- Open Access
Survey of Toxoplasma gondii and Neospora caninum, haemotropic mycoplasmas and other arthropod-borne pathogens in cats from Albania
© Silaghi et al.; licensee BioMed Central Ltd. 2014
- Received: 14 October 2013
- Accepted: 5 February 2014
- Published: 11 February 2014
Albania is a country on the western part of the Balkan Peninsula. The Mediterranean climate is favourable for the stable development of many arthropod species, which are incriminated as vectors for various agents. Recently, several papers have reported on epidemiological aspects of parasitic diseases including vector-borne disease agents of dogs with zoonotic characteristics in Albania. However, data on the epidemiology of feline parasitic and bacterial agents in Albania is scarce.
Serum and EDTA-blood samples collected from 146 domestic cats from Tirana during 2008 through 2010 were examined for exposure to Toxoplasma gondii, Neospora caninum, Leishmania infantum, and Anaplasma spp. with IFAT, for infection with L. infantum, A. phagocytophilum, Bartonella spp. and haemotropic mycoplasmas with conventional PCR and real-time PCR and for Dirofilaria immitis with antigen ELISA. Additionally blood smear microscopy was carried out for detection of blood-borne pathogens.
Antibodies to T. gondii (titre ≥1:100) were demonstrated in 91 cats (62.3%). Antibodies to N. caninum (titre ≥1:100), L. infantum (titre ≥1:64) and Anaplasma spp. (titre ≥1:100) were found in the serum of 15 (10.3%), 1 (0.7%) or 3 (2.1%) cats, respectively. DNA of haemotropic mycoplasmas was detected in the blood of 45 cats (30.8%), namely Candidatus Mycoplasma haemominutum (21.9%), Mycoplasma haemofelis (10.3%), and Candidatus Mycoplasma turicensis (5.5%), with ten cats harbouring co-infections of two mycoplasmas each; blood from one cat was PCR positive for Bartonella henselae. No DNA of Leishmania spp. and A. phagocytophilum or circulating D. immitis antigen was detected in any cat sample. The overall prevalence of haemotropic mycoplasmas was significantly higher in male compared to female cats (40.6% vs. 24.1%, p = 0.0444); and age was associated positively with the prevalence of antibodies to T. gondii (p = 0.0008) and the percentage of haemotropic mycoplasma infection (p = 0.0454).
With the broad screening panel including direct and indirect methods applied in the present study, a wide spectrum of exposure to or infection with parasitic or bacterial agents was detected.
- Toxoplasma gondii
- Neospora caninum
- Leishmania infantum
- Anaplasma spp.
- Bartonella henselae
- haemotropic mycoplasmas
Albania is a country on the western part of the Balkan Peninsula that extends to the south from central Europe into the Mediterranean Sea. The country is bordered by Montenegro to the northwest, Kosovo to the northeast, Former Yugoslav Republic of Macedonia to the east and Greece to the south and southeast. Albania has a coast on the Adriatic Sea to the west and on the Ionian Sea to the southwest, and is less than 75 km from southern Italy, across the Strait of Otranto. The climate is Mediterranean on the Adriatic coast, but the mountainous interior of Albania has a humid continental climate with frosty and snowy winters, especially in the north-eastern part of the country.
The Mediterranean Basin is considered as a region where zoonoses are widespread and most numerous as regards variety, but often receives insufficient attention to specifically assess its situation. Dogs especially, but cats too, may act as reservoirs of pathogens of zoonotic concern as populations of dogs and cats are numerous in both urban and rural areas. Among other factors, the mild Mediterranean climate is favourable for the stable development of many arthropod species, which are incriminated as vectors for various agents [1, 2].
Due to its history, Albania can be considered as a relatively uncharted country with respect to canine and feline diseases, including infections of zoonotic importance. Recently, several papers reported on aspects of the epidemiology of parasites including vector-borne disease agents of dogs with zoonotic character in Albania [3–7]. The knowledge regarding cats, however, is limited to preliminary data on parasites of internal organs, arthropod ectoparasites and the detection of zoonotic bacterial pathogens in fleas collected from cats [8–10].
The objective of this study was to assess exposure to or infection with Toxoplasma gondii and Neospora caninum, as well as bacterial and parasitic arthropod-transmitted pathogens, in serum and blood samples of cats from the capital Tirana by serological and molecular detection methods.
EDTA-blood and serum samples were collected from 146 (59 male, 87 female) clinically normal, free-roaming cats from suburban areas from Tirana, Albania, on four occasions either in summer (June/July, 75 cats) or autumn (October/November, 71 cats) during 2008 to 2010. The age of the cats ranged from approximately three months up to five years. The cats were categorized into the following age groups: kittens, <6 months (n = 33); juveniles, >6 and up to 12 months (n = 39); young adults, >12 and up to 36 months (n = 43); adults, >36 months (n = 31). Blood samples were frozen after collection with the exception of a total of 82 samples. Examination of the cats for ectoparasites revealed infestation with 1 to 50 fleas on 71 cats (total 320 Ctenocephalides felis and 5 Ctenocephalides Ctenocephalides canis), and a single female Rhipicephalus sanguineus tick was found on one other cat. As reported previously, the fleas collected from those cats and another seven cats were analyzed for the presence of flea-borne zoonotic pathogens, i.e. Bartonella spp. and Rickettsia spp. .
Sera were tested for the presence and the level of IgG antibodies against T. gondii, N. caninum, Anaplasma phagocytophilum and Leishmania infantum by indirect fluorescent antibody test (IFAT). A commercial test available for cat serum was used for T. gondii with controls and conjugate provided in the kit (MEGASCREEN® FLUO TOXOPLASMA gondii Test Kit antifeline). N. caninum and A. phagocytophilum were also tested with commercial kits, [MEGASCREEN® FLUO NEOSPORA c., MEGASCREEN® FLUO ANAPLASMA ph. (MegaCor, Hörbranz, Austria)] with FITC labeled anti-cat IgG conjugate (Sigma-Aldrich, Taufkirchen, Germany). For anti-L. infantum antibody detection, an in-house IFAT was used with L. infantum promastigote stages derived from cell culture serving as antigen 
In the absence of validated IFAT for felines, visible cytoplasmatic/membrane fluorescence (N. caninum, L. infantum) or fluorescence of cytoplasmatic morulae (A. phagocytophilum) was considered as seroreactive.
Two-fold serial dilutions were made starting from 1:25 (T. gondii, N. caninum, A. phagocytophilum) or 1:32 (L. infantum). Reactions at a dilution of ≥1:64 for L. infantum or ≥1:100 for T. gondii, N. caninum, and A. phagocytophilum were considered positive; positive serum was serially diluted to 1:800 (N. caninum, A. phagocytophilum), 1:1600 (T. gondii), or 1:512 (L. infantum). Positive control sera for T. gondii were provided by the manufacturer of the test kit and by Dr. Sándor Hornok (Institute for Parasitology and Zoology, Faculty of Veterinary Medicine, Szent Istvan University, Budapest, Hungary) who also provided a N. caninum-positive cat serum sample. For Leishmania and Anaplasma, feline serum samples obtained from the routine diagnostic centre of the Institute of Comparative Tropical Medicine and Parasitology in Munich, with titres of >1:256, were used as positive controls.
The DiroCHEK® Canine/Feline Antigen Test Kit (Synbiotics Corp., San Diego, USA) was employed for the detection of circulating female adult heartworm proteins (Dirofilaria immitis).
Direct pathogen detection and molecular biological analysis
A Giemsa-stained blood smear from each cat was microscopically examined for intra- and extracellular pathogens, and the Knott’s test was used to detect microfilariae in a subset of 82 blood samples, which had not been frozen after sampling.
DNA was extracted from the EDTA–blood with a commercial kit according to the manufacturer’s instructions for blood (QIAamp DNA MiniKit, Qiagen, Hilden, Germany). Quality and quantity of the extracted DNA were checked with a spectrophotometer (NanoDrop®1000, Peqlab, Erlangen, Germany).
Summary of specific PCR and real-time PCR methods used in this study on cats from Albania
Conventional PCR methods
Bartonella spp. 16S-23S ITS (154–260 bp) B. henselae: 172 bp
44 cycles: 30 Sec 94°C, 30 Sec 60°C, 30 Sec 72°C
Mycoplasma haemofelis/Candidatus M. haemominutum 16S rRNA gene (274 bp/202 bp respectively)
35 cycles: 45 Sec 94°C, 45 Sec 58°C, 45 Sec 72°C
Real-time PCR methods
Leishmania infantum Kinetoplast ~700 bp
All Real-time PCR methods: 2 min 50°C, 10 min 95°C, 40 cycles: 15 Sec 95°C, 1 min 60°C
Anaplasma phagocytophilum: Msp2 gene (77 bp)
Candidatus M. turicensis 16S rRNA gene (85 bp)
HS Real2_for: GAAGGCCAGACAGGTCGTAAAG
HS Real2_rev: CTGGCACATAGTTWGCTGTCACTTA
HS RealT: FAM-AAATTTGATGGTACCCTCTGA-MGB
Exact 95% confidence intervals (95% CI) for the percentages of seropositivity or prevalences of pathogens were calculated with the Clopper and Pearson method. Fisher’s exact test or chi-squared statistics were used to test for associations of the analytical results with gender and age of the cats, season of sample collection or between analytical results themselves. P-values <0.05 were considered as significant.
This study was approved by the ethical committee of the Universiteti Bujqësor, Fakulteti i Mjeksise Veterinare, Tirana, Albania.
A total of 63.7% of the 146 cats tested positive in the indirect detection tests, as well as 31.5% with direct test methods, resulting in 72.6% of the 146 cats with evidence for exposure to T. gondii, N. caninum, L. infantum and/or Anaplasma spp., and/or infection with Bartonella henselae or haemotropic mycoplasmas.
Details of cats that tested seropositive (IFAT titre ≥1:100) for Toxoplasma gondii
Number of cats studied
Number of cats seropositive for Toxoplasma gondii, total (%)
34 (57.6, 95% CI1 44.1-70.4)
57 (65.5, 95% CI 54.6-75.4)
Kitten, ≤6 months
12 (36.4, 95% CI 20.4-54.9)
Juvenile, >6-12 months
23 (59.0, 95% CI 42.1-74.4)
Young adult, >12-36 months
30 (69.8, 95% CI 53.9-82.8)
Adult, >36 months
26 (83.9, 95% CI 66.2-94.6)
91 (62.3, 95% CI 53.9-70.2)
Details of cats that tested seropositive (IFAT titre ≥1:100) for Neospora caninum
Number of cats studied
Number of cats seropositive for Neospora caninum, total (%)
6 (10.2, 95% CI1 3.8-20.8)
9 (10.3, 95% CI 4.8-18.7)
Kitten, ≤6 months
2 (6.1, 95% CI 0.7-20.2)
Juvenile, >6-12 months
5 (12.8, 95% CI 4.3-27.4)
Young adult, >12-36 onths
5 (11.6, 95% CI 3.9-25.1)
Adult, >36 months
3 (9.7, 95% CI 2.0-25.8)
15 (10.3, 95% CI 5.9-16.4)
In addition, one (0.7%, 95% CI, 0.02-3.76) and three (2.1%, 95% CI 0.4-5.9) serum samples tested positive for antibodies to L. infantum (IFAT titre 1:256) or A. phagocytophilum (IFAT titres 1:100, 1:200 or 1:800), respectively. Borderline 1:32 anti-L. infantum or 1:50 anti-Anaplasma- IFAT titres were observed in ten and eight cats, respectively. All ELISA tests were negative for circulating D. immitis antigen.
Direct pathogen detection
Details of cats that tested positive for haemotropic mycoplasmas
Number of cats studied
Number of cats tested positive for mycoplasmas, total (%)
24 (40.7, 95% CI4 28.1-54.3)
21 (24.1, 95% CI 15.6-34.5)
Kitten, ≤6 months
4 (12.1, 95% CI 3.4-28.2)
Juvenile, >6-12 months
12 (30.8, 95% CI 17.0-47.6)
Young adult, >12-36 months
16 (37.2, 95% CI 23.0-53.3)
Adult, >36 months
13 (41.9, 95% CI 24.6-60.9)
45 (30.8, 95% CI 23.5-39.0)
Microscopy of the blood smears did not reveal evidence for the presence of any pathogen, and all Knott’s tests were negative. No blood sample was PCR-positive for DNA of A. phagocytophilum or L. infantum.
The overall prevalence of haemotropic mycoplasmas was significantly higher in male compared to female cats (40.6% vs. 24.1%, p = 0.0444); however, there was no significant association of either sex to the seroprevalences of T. gondii (57.6% and 65.5%, respectively) and N. caninum (10.2% and 10.3%, respectively). Age was associated positively with the frequency of anti-T. gondii antibodies (p = 0.0008) and the prevalence of haemotropic mycoplasmas (p = 0.0454), but there was no association with age for the seropositivity for N. caninum. There was no significant difference in the prevalence of haemotropic mycoplasmas for the two seasons of collection (summer: 25/75, 33.3% vs. autumn: 20/71, 28.2%, respectively) or the status of infestation with fleas (haemotropic mycoplasma-positive/flea-positive: 17/71, 23.9% vs. haemotropic mycoplasma-positive/flea-negative: 28/75, 37.3%, respectively).
Co-infections and exposure to multiple pathogens
Single and combined seropositivity and/or infection in 146 cats from Tirana, Albania
Prevalence, total (%)
Single seropositivity or infection in cats
Toxoplasma gondii 1
Neospora caninum 1
Candidatus Mycoplasma haemominutum
Candidatus Mycoplasma turicensis
Combined seropositivity and/or infection in cats
T. gondii + N. caninum
T. gondii + Leishmania infantum2
T. gondii + Anaplasma phagocytophilum1
T. gondii + M. haemofelis
T. gondii + Candidatus M. haemominutum
T. gondii + Candidatus M. turicensis
M. haemofelis + Candidatus M. haemominutum
Candidatus M. haemominutum + Candidatus M. turicensis
T. gondii + N. caninum + M. haemofelis
T. gondii + N. caninum + Candidatus M. haemominutum
T. gondii + N. caninum + Candidatus M. turicensis
T. gondii + M. haemofelis + Candidatus M. haemominutum
T. gondii + Candidatus M. haemominutum + Candidatus M. turicensis
N. caninum + M. haemofelis + Candidatus M. haemominutum
T. gondii + N. caninum + Candidatus M. haemominutum + Candidatus M. turicensis
This is the first study documenting seroprevalence of T. gondii, N. caninum, L. infantum and Anaplasma spp., and the molecular detection and prevalence of B. henselae and three haemotropic mycoplasmas in cats in Tirana, Albania.
Toxoplasma gondii is one of the most prevalent cosmopolitan parasites, which can infect a wide spectrum of warm-blooded vertebrates. Based on its zoonotic nature, toxoplasmosis is one major public health issue worldwide and thus monitored closely in human medicine, but it is also considered as an important cause of reproductive disease in small ruminants. Felids, including domestic cats, are the only definitive hosts of this parasite. As cats are shedding Toxoplasma oocysts only for a short period, sero-surveys are suitable measures to study the epidemiology of the pathogen, and they can be used as an indicator of the environmental contamination [17–19]. Toxoplasmosis is widespread in south-east Europe . The average prevalence of IgG antibodies was reported to be approximately 50% in pregnant woman in Albania  and among Albanians who migrated to Italy  and this percentage of exposure represents the upper limit of the range of currently reported data from the Balkans [23–25]. The overall seroprevalence of 62.3% in the cats from Tirana is among the highest infection percentage observed in Europe where T. gondii antibodies were detected in up to 70% of the cats . Recently seroprevalences of 47% to 81% were reported in cats in Romania [27, 28] or of almost 48% in Hungary . Consistent with several other studies, the T. gondii seroprevalence in the cats from Tirana was positively associated with the age of the cats [28, 29]. The association between seropositivity and gender, however, is unclear: in most surveys, including this study, the overall prevalence of infection in male and female cats did not differ significantly [27, 28]; but there are some studies that found T. gondii exposure significantly more often among female cats [29, 30]. The high prevalence of T. gondii antibodies in the cats from Tirana, Albania, is certainly related to their origin from suburban habitats with constant access to the outdoors, which has been identified as a risk factor of the infection . The prevalence of antibodies to T. gondii in pregnant women in Albania was similar to the proportion observed in other parts of Europe. Beside consumption of undercooked meat, ‘direct soil contact’ has been thought to be associated with the seropositivity . Therefore, given the high percentage of exposure to T. gondii in cats from Tirana, the seroprevalence of T. gondii in cats should be monitored further as it gives an indication of the contamination of the environment with oocysts and thus the potential implication for public health. Furthermore, the public should be informed about the risks of undercooked meat consumption.
Neospora caninum is primarily associated with dogs and cattle, and neosporosis continues to be an important cause of abortion in cattle. Felines belong to the wide spectrum of domestic and wild animals that are exposed to N. caninum, but neither Neospora have been isolated from them nor were clinical signs of disease reported . For Albania, there is no information on the prevalence of N. caninum in cattle, but a recently conducted study estimated a seroprevalence of 18.3% in dogs (Hamel et al., unpublished). Sero-surveys in cats indicated 0 to almost 25% prevalence in domestic cats [29, 32–36]. The seroprevalence observed in the Tirana cats was thus in the range of results of other surveys, and consistent with a study from Italy .
Seropositivity was not associated to the age or sex of the cats. However, other studies found a positive correlation of the anti-N. caninum antibody prevalence and the cats’ age [33, 35, 36]. As indicated through the significant association of positive samples for N. caninum and T. gondii antibodies in this study (including the considerable number of cats with borderline anti-N. caninum titres) and similar observations in other studies [34, 35], serological cross-reactions between these two closely related apicomplexan protozoa cannot be ruled-out because N. caninum and T. gondii share common antigens .
None of the blood smears were positive for morulae, and no A. phagocytophilum- DNA was detected in any blood sample, but exposure to Anaplasma infection has been demonstrated through low titres in the serum of three cats (2.1%) using the commercial A. phagocytophilum- IFAT. Similar results were obtained previously when cat sera from Spain were tested [38, 39]. In contrast, 40% of 30 dogs from Tirana tested positive with an A. phagocytophilum-IFAT , and in a recently completed study with 602 dogs under veterinary care from Albania, a seropositivity of 24% was established (Hamel et al., unpublished). The main vector of A. phagocytophilum in Europe, the tick Ixodes ricinus, is abundant in Albania and has been recorded on dogs in the city and district of Tirana in the past . However, recently conducted surveys revealed R. sanguineus as the predominating species of ticks parasitizing dogs from Tirana while I. ricinus was recovered from single animals in low numbers only . On cats from Tirana, however, no I. ricinus at all, but few R. sanguineus ticks were found previously  as well as in the present study. The occurrence of two anaplasmas, A. phagocytophilum and A. platys, has been confirmed in blood samples of dogs from Albania with the latter species dominating (Hamel et al., unpublished). A. platys is thought to be transmitted by R. sanguineus and feline A. platys infections have been reported previously . Cross-reactivity of serum samples between A. phagocytophilum and A. platys antigens have been described in dogs [43–45]. Thus, seropositivity detected with the commercial A. phagocytophilum-IFAT in the cats in this study may be attributed to infection with either of the two or both anaplasmas.
Albania belongs to the countries where zoonotic visceral leishmaniosis is endemic, and the disease is of great relevance in humans [46–48]. Competent vectors of L. infantum, the causative agent of human and canine leishmaniosis in Albania , are abundant in the country , and their occurrence was also documented for the district and city of Tirana . Sero-surveys conducted in Albania indicated average anti-Leishmania antibody prevalences of 4–5.1% in dogs of different categories and geographic origin  (Hamel et al., unpublished). In contrast to the situation in dogs, feline leishmaniosis occurs sporadically and usually only in regions where canine leishmaniosis is endemic. The recently proven infectiousness of cats to sand-flies re-emphasized the question of the role of felines in the epidemiology of leishmaniosis which is still not clear [52, 53]. With only 1 out of 146 feline sera from Tirana testing as Leishmania-positive, the percentage of exposure of cats to the parasite in the present study was at the lower end of the wide range of findings reported from other countries in the south of mainland Europe [54–58] and is much lower than the 5.1% seroprevalence recorded in dogs from Tirana (Hamel et al., unpublished). For the Balkans, information on feline leishmaniosis is available apparently through two recently conducted sero-surveys in Greece only. For both studies, serum samples were collected from stray cats in the Thessaloniki area, but the seroprevalences determined differed substantially with 21.6%  or 3.9% , respectively.
Canine D. immitis is endemic in Albania [3–5, 7], and several of its incriminated vectors are common representatives of the culicid fauna in the country . However, microfilariae were not detected in any blood smears or by using the Knott’s test neither was heartworm antigen detected in any serum sample of the cats from Tirana. Although canine heartworm infection was reported with increasing frequency from most of the countries of the Balkans in the recent past [7, 62], the authors are not aware of any survey on feline dirofilariosis in the region. Similar to leishmaniosis, feline dirofilariosis is much less frequently diagnosed compared to canine dirofilariosis in a given region and, based on data collected in endemic areas, the prevalence of heartworm infection in cats can be expected to be 5% to 10% of that seen in dogs .
As the main reservoir for B. henselae, the cat is a host which is often associated with Bartonella infections and with their transmission to man, while fleas have been proven to serve as vectors for transmission of the agents among cats [64, 65]. Human disease associated to infection with Bartonella species as well as seropositivity to Bartonella spp. has been described from some countries in the Balkans [66, 67] but yet not from Albania. The prevalence of Bartonella infection in cats in the Balkan region is largely unknown. To the knowledge of the authors, there is only a small-scale survey from Serbia, which found that 57% of 40 cats had anti-B. henselae antibodies . Bartonella henselae and B. clarridgeiae were demonstrated in C. felis fleas collected from seven cats from Tirana  including five cats studied in this survey. The single flea collected from the four months old, female kitten whose blood tested positive for B. henselae in the present study, however, did not harbour Bartonella- DNA . In contrast, the positive fleas reported by Silaghi et al. (2012) were collected from cats negative for Bartonella spp. . Thus, further studies are needed to understand the involvement of cats in the epidemiology of Bartonella infections in the Balkans.
Four haemotropic mycoplasmas have been recognized in cats: M. haemofelis, Candidatus M. haemominutum, Candidatus M. turicenis and Candidatus M. haematoparvum-like. These mycoplasmas differ in their pathogenicity, with M. haemofelis being the most virulent one that may cause severe haemolytic anaemia. The others may cause changes in blood parameters, but rarely cause diseases without concurrent infections; for the latter one no data is available. Subclinical infections with cats acting as carriers with subclinical infection are common. Feline haemotropic mycoplasma infections are believed to have a worldwide distribution with variable prevalence in the different populations of cats [69, 70]. For Albania, this is the first study to document the occurrence and prevalence of three haemotropic mycoplasmas in cats, and it is the only other study on feline haemotropic mycoplasma infection from the Balkans beside one report from Greece . The overall proportion of haemotropic mycoplasma infection of almost 31% as well as the prevalence of the individual mycoplasmas, including the percentage of co-infections, were within the range of results obtained in other studies in Europe [71–75]. The highest overall prevalence of haemotropic mycoplasmas in Europe (43.4%) was found in a recently reported study from Portugal, where all four feline haemotropic mycoplasmas were identified, with all four mycoplasmas co-infecting one cat . In line with some other studies, male sex [69, 71, 72] and older age [16, 71, 77, 78] were found significantly associated with the detection of haemotropic mycoplasma DNA in the cats from Tirana. Contradictory to Gentilini et al. (2009), who suggested an association of summer season and higher prevalence of feline haemotropic mycoplasma infection because of a higher ectoparasite load which facilitates vectorial transmission of infections, own data and results of studies from Germany and Portugal [72, 76, 79] do not indicate a positive correlation of the presence of blood-feeding arthropods and feline haemoplasmosis. Furthermore, analysis for mycoplasma DNA of all fleas collected from the cats in this study revealed only DNA of Candidatus M. haemominutum in two single C. felis fleas from two cats (unpublished data). One of those cats was a kitten that tested positive for B. henselae but was negative for haemotropic mycoplasma infection and had one flea only; the other cat was infected with Candidatus M. haemominutum and had three fleas. Both, the lack of correlation of the presence of blood-feeding arthropods and detection of DNA of haemotropic mycoplasmas and the marked discrepancy between the detection percentages of haemotropic mycoplasmas in the cats and in their fleas support hypotheses of the existence of routes of transmission of these bacterial organisms other than fleas acting as vectors. Aggressive interaction, such as cat bites, has been suggested as the possible route of transmission and this is supported by the higher prevalence in older and male cats seen in the present study .
In conclusion, with the broad screening panel including direct and indirect methods applied in the present study, a wide spectrum of parasitic or vector-borne agents and/or exposure to them could be detected in Albanian cats from Tirana.
We thank Dr. Sándor Hornok, Faculty of Veterinary Medicine, Szent Istvan University, Hungary for providing the N. caninum and T. gondii-positive feline serum samples. Further we acknowledge the excellent technical assistance of Andrea Mihalkov and Claudia Thiel.
This document is provided for scientific purposes only. Any reference to a brand or trademark herein is for informational purposes only and is not intended for a commercial purpose or to dilute the rights of the respective owner(s) of the brand(s) or trademark(s).
- Seimensis A, Morelli D, Mantovani A: Zoonoses in the Mediterranean region. Ann Ist Super San. 2006, 42: 437-445.Google Scholar
- Otranto D, Dantas-Torres F: Canine and feline vector-borne diseases in Italy: current situation and perspectives. Parasit Vectors. 2010, 3: 2-10.1186/1756-3305-3-2.PubMed CentralView ArticlePubMedGoogle Scholar
- Lazri T, Duscher G, Edelhofer R, Bytyci B, Gjino P, Joachim A: Infektionen mit arthropodenübertragenen Parasiten bei Hunden im Kosovo und in Albanien unter besonderer Berücksichtigung der Leishmanieninfektionen. Wiener Klin Wochenschr. 2008, 120 (Suppl 4): 54-58.View ArticleGoogle Scholar
- Hamel D, Silaghi C, Knaus M, Visser M, Kusi I, Rapti D, Rehbein S, Pfister K: Detection of Babesia canis subspecies and other arthropod-borne diseases in dogs from Tirana, Albania. Wiener Klin Wochenschr. 2009, 121 (Suppl 3): 42-45.View ArticleGoogle Scholar
- Xhaxhiu D, Kusi I, Rapti D, Kondi E, Postoli R, Rinaldi L, Dimitrova ZM, Visser M, Knaus M, Rehbein S: Principal intestinal parasites of dogs in Tirana, Albania. Parasitol Res. 2011, 108: 341-353. 10.1007/s00436-010-2067-8.View ArticlePubMedGoogle Scholar
- Xhaxhiu D, Kusi I, Rapti D, Visser M, Knaus M, Lindner T, Rehbein S: Ectoparasites of dogs and cats in Albania. Parasitol Res. 2009, 105: 1577-1587. 10.1007/s00436-009-1591-x.View ArticlePubMedGoogle Scholar
- Rapti D, Rehbein S: Seroprevalence of canine heartworm (Dirofilaria immitis) infection in Albania. Parasitol Res. 2010, 107: 481-485. 10.1007/s00436-010-1914-y.View ArticlePubMedGoogle Scholar
- Knaus M, Kusi I, Rapti D, Xhaxhiu D, Winter R, Visser M, Rehbein S: Endoparasites of cats from the Tirana area and the first report on Aelurostrongylus abstrusus (railliet, 1898) in Albania. Wiener Klin Wochenschr. 2011, 123 (Suppl 1): 31-35.View ArticleGoogle Scholar
- Knaus M, Rapti D, Kusi I, Shukullari E, Postoli R, Xhaxhiu D, Winter R, Visser M, Rehbein S: Survey of Endo- and Ectoparasites of Cats from Tirana, Albania. 2011, Buenos Aires, Argentina: 23rd International Conference of the World Association for the Advancement in Veterinary Parasitology (WAAVP), 232-AbstractsGoogle Scholar
- Silaghi C, Knaus M, Rapti D, Shukullari E, Pfister K, Rehbein S: Rickettsia felis and Bartonella spp. in fleas from cats in Albania. Vector-Borne Zoonotic Dis. 2012, 12: 76-77. 10.1089/vbz.2011.0732.View ArticlePubMedGoogle Scholar
- Mancianti F, Falcone ML, Giannelli C, Poli A: Comparison between an enzyme-linked immunosorbent assay using a detergent-soluble Leishmania infantum antigen and indirect immunofluorescence for the diagnosis of canine leishmaniosis. Vet Parasitol. 1995, 59: 13-21. 10.1016/0304-4017(94)00738-X.View ArticlePubMedGoogle Scholar
- Jensen WA, Fall MZ, Rooney J, Kordick DL, Breitschwerdt EB: Rapid identification and differentiation of Bartonella species using a single-step PCR assay. J Clin Microbiol. 2000, 38: 1717-1722.PubMed CentralPubMedGoogle Scholar
- Watanabe M, Hisasue M, Hashizaki K, Furuichi M, Ogata M, Hisamatsu S, Ogi E, Hasegawa M, Tsuchiya R, Yamada T: Molecular detection and characterization of Haemobartonella felis in domestic cats in Japan employing sequence-specific polymerase chain reaction (SS-PCR). J Vet Med Sci. 2003, 65: 1111-1114. 10.1292/jvms.65.1111.View ArticlePubMedGoogle Scholar
- Mary C, Faraut F, Lascombe L, Dumon H: Quantification of Leishmania infantum DNA by a real-time PCR assay with high sensitivity. J Clin Microbiol. 2004, 42: 5249-5255. 10.1128/JCM.42.11.5249-5255.2004.PubMed CentralView ArticlePubMedGoogle Scholar
- Courtney JW, Kostelnik LM, Zeidner NS, Massung RF: Multiplex real-time PCR for detection of Anaplasma phagocytophilum and Borrelia burgdorferi. J Clin Microbiol. 2004, 42: 3164-3168. 10.1128/JCM.42.7.3164-3168.2004.PubMed CentralView ArticlePubMedGoogle Scholar
- Willi B, Boretti FS, Baumgartner C, Tasker S, Wenger B, Cattori V, Meli ML, Reusch CE, Lutz H, Hofmann-Lehmann R: Prevalence, risk factor analysis, and follow-up of infections caused by three feline hemoplasma species in cats in Switzerland. J Clin Microbiol. 2006, 44: 961-969. 10.1128/JCM.44.3.961-969.2006.PubMed CentralView ArticlePubMedGoogle Scholar
- Tenter AM, Heckeroth AR, Weiss LM: Toxoplasma gondii: from animals to humans. Int J Parasitol. 2000, 30: 1217-1258. 10.1016/S0020-7519(00)00124-7.PubMed CentralView ArticlePubMedGoogle Scholar
- Dabritz HA, Conrad PA: Cats and Toxoplasma: implications for public health. Zoon Publ Health. 2010, 57: 34-52. 10.1111/j.1863-2378.2009.01273.x.View ArticleGoogle Scholar
- Elmore SA, Jones JL, Conrad PA, Patton S, Lindsay DS, Dubey JP: Toxoplasma gondii: epidemiology, feline clinical aspects, and prevention. Trends Parasitol. 2010, 26: 190-196. 10.1016/j.pt.2010.01.009.View ArticlePubMedGoogle Scholar
- Bobić B, Klun I, Nikolić A, Djurković-Djaković O: Toxoplasma gondii-infection in south-east Europe: epidemiology and epizootiology. Toxoplasmosis – Recent Advances. Edited by: Djurković-Djaković O. 2012, Rijeka, Croatia: InTech, 37-54.Google Scholar
- Maggi P, Volpe A, Carito V, Schinaia N, Bino S, Basho M, Dentico P: Surveillance of toxoplasmosis in pregnant women in Albania. New Microbiol. 2009, 32: 89-92.PubMedGoogle Scholar
- Ventura MT, Munno G, Giannoccaro F, Accettura F, Chironna M, Lama R, Hoxha M, Panetta V, Ferrigno L, Rosmini F, Matricardi PM, Barbuti S, Priftanji A, Bonini S, Tursi A: Allergy, asthma and markers of infections among Albanian migrants to Southern Italy. Allergy. 2004, 59: 632-636. 10.1111/j.1398-9995.2004.00448.x.View ArticlePubMedGoogle Scholar
- Bobić B, Nikolić A, Klun I, Djurković-Djaković O: Kinetics of Toxoplasma infection in the Balkans. Wiener Klin Wochenschr. 2011, 123 (Suppl 1): 2-6.Google Scholar
- Dentico P, Volpe A, Putoto G, Ramadani N, Bertinato L, Berisha M, Schinaia N, Quaglio G, Maggi P: Toxoplasmosis in Kosovo pregnant women. New Microbiol. 2011, 34: 203-207.PubMedGoogle Scholar
- Mancianti F, Nardoni S, Ariti G, Parlanti D, Giuliani G, Papini RA: Cross-sectional survey of Toxoplasma gondii infection in colony cats from urban Florence (Italy). J Feline Med Surg. 2010, 12: 351-354. 10.1016/j.jfms.2009.09.001.View ArticlePubMedGoogle Scholar
- Michalski MM, Platt-Samoraj A, Mikulska-Skupień E: Toxoplasma gondii antibodies in domestic cats in Olsztyn urban area, Poland. Wiad Parazytol. 2010, 56: 277-279.PubMedGoogle Scholar
- Darabus G, Hotea I, Oprescu I, Morariu S, Brudiu I, Olariu RT: Toxoplasmosis seroprevalence in cats and sheep from western Romania. Rev Med Vet. 2011, 162: 316-320.Google Scholar
- Györke A, Opsteegh M, Mircean V, Iovu A, Cozma V: Toxoplasma gondii in Romanian household cats: evaluation of serological tests, epidemiology and risk factors. Prev Vet Med. 2011, 102: 321-328. 10.1016/j.prevetmed.2011.07.015.View ArticlePubMedGoogle Scholar
- Hornok S, Edelhofer R, Joachim A, Farkas R, Berta K, Répási A, Lakatos B: Seroprevalence of Toxoplasma gondii and Neospora caninum infection of cats in hungary. Acta Vet Hung. 2008, 56: 81-88. 10.1556/AVet.56.2008.1.8.View ArticlePubMedGoogle Scholar
- Jittapalapong S, Nimsupan B, Pinyopanuwat N, Chimnoi W, Kabeya H, Maruyama S: Seroprevalence of Toxoplasma gondii antibodies in stray cats and dogs in the Bangkok metropolitan area, Thailand. Vet Parasitol. 2007, 145: 138-141. 10.1016/j.vetpar.2006.10.021.View ArticlePubMedGoogle Scholar
- Dubey JP, Schares G: Neosporosis in animals–the last five years. Vet Parasitol. 2011, 180: 90-108. 10.1016/j.vetpar.2011.05.031.View ArticlePubMedGoogle Scholar
- Ferroglio E, Guiso P, Pasino M, Accossato A, Trisciuoglio A: Antibodies to Neospora caninum in stray cats from north Italy. Vet Parasitol. 2005, 131: 31-34. 10.1016/j.vetpar.2005.04.012.View ArticlePubMedGoogle Scholar
- Bresciani KDS, Gennai SM, Serrano ACM, Rodrigues AAR, Ueno T, Franco LG, Perri SHV, Amarante AFT: Antibodies to Neospora caninum and Toxoplasma gondii in domestic cats from Brazil. Parasitol Res. 2007, 100: 281-285. 10.1007/s00436-006-0262-4.View ArticlePubMedGoogle Scholar
- Millán J, Cabezón O, Pabón M, Dubey JP, Almería S: Seroprevalence of Toxoplasma gondii and Neospora caninum in feral cats (Felis silvestris catus) in Majorca, Balearic Islands, Spain. Vet Parasitol. 2009, 165: 323-326. 10.1016/j.vetpar.2009.07.014.View ArticlePubMedGoogle Scholar
- Dourado Coelho WM, Amarante AF S d, de Carvalho Apolinário J, Dourado Coelho NM, de Lima VM F, Perri SHV, Bresciani KDS: Seroepidemiology of Toxoplasma gondii, Neospora caninum, and Leishmania spp. Infections and risk factors for cats from Brazil. Parasitol Res. 2011, 109: 1009-1013. 10.1007/s00436-011-2461-x.View ArticleGoogle Scholar
- Hamidinejat H, Mosalanejad B, Avizeh R, Jalali MHR, Ghorbanpour M, Namavari M: Neospora caninum and Toxoplasma gondii antibody prevalence in Ahvaz feral cats, Iran. Jundishapur J Microbiol. 2011, 4: 217-222.Google Scholar
- Bjerkas I, Jenkins MC, Dubey JP: Identification and characterization of Neospora caninum tachyzoite antigens useful for diagnosis of neosporosis. Clin Diag Lab Immunol. 1994, 1: 214-221.Google Scholar
- Aguirre E, Tesoro MA, Amusategui I, Rodríguez-Franco F, Sainz A: Assessment of feline ehrlichiosis in central Spain using serology and a polymerase chain reaction technique. Ann N Y Acad Sci. 2004, 1026: 103-105. 10.1196/annals.1307.013.View ArticlePubMedGoogle Scholar
- Solano-Gallego L, Hegarty B, Espada Y, Llull J, Breitschwerdt E: Serological and molecular evidence of exposure to arthropod-borne organisms in cats from northeastern Spain. Vet Microbiol. 2006, 118: 274-277. 10.1016/j.vetmic.2006.07.010.View ArticlePubMedGoogle Scholar
- Gina A: Të dhëna faunistike mbi rriqnat e familjes ixodidae në rrethin e tiranës. Bul Shkencave Nat. 1973, 2: 73-86.Google Scholar
- Sanogo YO, Davoust B, Inokuma H, Camicas JL, Parola P, Brouqui P: First evidence of Anaplasma platys in Rhipicephalus sanguineus (Acari: ixodida) collected from dogs in Africa. Onderstepoort J Vet Res. 2003, 70: 205-212.PubMedGoogle Scholar
- Lima MLF, Soares PT, Ramos CAN, Araújo FR, Ramos RAN, Souza IIF, Faustino MAG, Alves LCA: Molecular detection of Anaplasma platys in a naturally-infected cat in Brazil. Braz J Microbiol. 2010, 41: 381-385. 10.1590/S1517-83822010000200019.PubMed CentralView ArticlePubMedGoogle Scholar
- Beaufils JP, Inokuma H, Martin-Granel J, Jumelle P, Barbault-Jumelle M, Brouqui P: Anaplasma platys (Ehrlichia platys) infection in a dog in France: description of the case, and characterization of the agent. Rev Med Vet. 2002, 153: 85-90.Google Scholar
- Inokuma H, Fujii K, Matsumoto K, Okuda M, Nalagome K, Kosugi R, Hirakawa M, Onishi T: Demonstration of Anaplasma (Ehrlichia) platys inclusions in peripheral blood platelets of a dog in Japan. Vet Parasitol. 2002, 110: 145-152. 10.1016/S0304-4017(02)00289-3.View ArticlePubMedGoogle Scholar
- Santos AS, Alexandre N, Sousa R, Núncio MS, Bacellar F, Dumler JS: Serological and molecular survey of Anaplasma species infection in dogs with suspected tickborne disease in Portugal. Vet Rec. 2009, 164: 168-171. 10.1136/vr.164.6.168.View ArticlePubMedGoogle Scholar
- Sotira B: Zoonotic diseases of major concern in Albania. WHO Mediterranean zoonoses control centre. Info Circul. 2000, 49: 6-8.Google Scholar
- Lito G, Davachi F, Sulcebe G, Bregu H, Basha M: Pediatric visceral leishmaniasis in Albania. Int J Inf Dis. 2002, 6: 66-68. 10.1016/S1201-9712(02)90139-6.View ArticleGoogle Scholar
- Petrela R, Kuneshka L, Foto E, Zavalani F, Gradoni L: Pediatric visceral leishmaniasis in Albania: a retrospective analysis of 1,210 consecutive hospitalized patients (1995–2009). PloS Negl Trop Dis. 2010, 4: e814-10.1371/journal.pntd.0000814.PubMed CentralView ArticlePubMedGoogle Scholar
- Cani E, Petrela R, Myrseli T, Fuga L, Minarolli P, Hyskaj M: Identification of two visceral Leishmania strains isolated in Tirana, Albania. Clin Microbiol Inf. 2001, 7 (Suppl 1): 346-Google Scholar
- Velo E, Paparisto A, Bongiorno G, Di Muccio T, Khoury C, Bino S, Gramoccia M, Gradoni L, Maroli M: Entomological and parasitological study on phlebotomine sandflies in central and northern Albania. Parasite. 2005, 12: 45-49. 10.1051/parasite/2005121045.View ArticlePubMedGoogle Scholar
- Adhami J, Miho V, Murati N: Fauna e flebotomëve të qytetit të Tiranës, disa fshatrave përreth tij dhe rëndësia epidemiologjike e tyre. Rev Mjekësore. 1988, 4: 9-12.Google Scholar
- Gramiccia M: Recent advances in leishmaniosis in pet animals: epidemiology, diagostics and anti-vectorial prophylaxis. Vet Parasitol. 2011, 181: 23-30. 10.1016/j.vetpar.2011.04.019.View ArticlePubMedGoogle Scholar
- Maia C, Campino L: Can domestic cats be considered reservoir hosts of zoonotic leishmaniasis?. Trends Parasitol. 2008, 27: 341-344.View ArticleGoogle Scholar
- Solano-Gallego L, Rodríguez-Cortés A, Iniesta L, Quintana J, Pastor J, Espada Y, Portús M, Alberala J: Cross-sectional serosurvey of feline leishmaniasis in ecoregions around the Northwestern Mediterranean. Am J Trop Med Hyg. 2007, 76: 676-680.PubMedGoogle Scholar
- Ayllón T, Tesuoro MA, Amutsategui I, Villaescusa A, Rodríguez-Franco F, Sainz A: Serologic and molecular evaluation of Leishmania infantum in cats from central Spain. Ann N Y Acad Sci. 2008, 1149: 361-364. 10.1196/annals.1428.019.View ArticlePubMedGoogle Scholar
- Maia C, Gomes J, Cristóvão J, Nunes M, Martins A, Rebêlo E, Campino L: Feline Leishmania infection in a canine leishmaniasis endemic region, Portugal. Vet Parasitol. 2010, 174: 336-340. 10.1016/j.vetpar.2010.08.030.View ArticlePubMedGoogle Scholar
- Cardoso L, Lopes AP, Sherry K, Schallig H, Solano-Gallego L: Low seroprevalence of Leishmania infantum infection in cats from northern Portugal based on DAT and ELISA. Vet Parasitol. 2010, 174: 37-42. 10.1016/j.vetpar.2010.08.022.View ArticlePubMedGoogle Scholar
- Pennisi MG, Lupo T, Masucci M, Migliazzo A, Lombardo G: Serological and molecular prevalence of Leishmania infantum infection in cats from southern Italy. J Feline Med Surg. 2012, 14: 656-657.Google Scholar
- Huebner J, Müller E, Langbein-Detsch I, Naucke T: Serological survey of Leishmania infections in cats from north Greece. J Vet Int Med. 2008, 22: 782-783.Google Scholar
- Diakou A, Papadopoulos E, Lazarides K: Specific anti-Leishmania spp. antibodies in stray cats in Greece. J Feline Med Surg. 2009, 11: 728-730. 10.1016/j.jfms.2008.01.009.View ArticlePubMedGoogle Scholar
- Adhami J, Reiter P: Introduction and establishment of Aedes (Stegomyia) albopictus skuse (Diptera: Culicidae) in Albania. J Am Mosq Contr Ass. 1998, 14: 340-343.Google Scholar
- Tasić A, Tasić-Otašević S, Gabrielli S, Miladinović-Tasić N, Ignjatović A, Đorđević J, Dimitrijević S, Cancrini G: Canine Dirofilaria infections in two uninvestigated areas of Serbia: epidemiological and genetic aspects. Vector-borne Zoon Dis. 2012, 12: 1031-1035. 10.1089/vbz.2011.0949.View ArticleGoogle Scholar
- Litster AL, Atwell RB: Feline heartworm disease: a clinical review. J Feline Med Surg. 2008, 10: 137-144. 10.1016/j.jfms.2007.09.007.View ArticlePubMedGoogle Scholar
- Bitam I, Dittmar K, Parola P, Whiting MF, Raoult D: Fleas and flea-borne diseases. Int J Infect Dis. 2010, 14: e667-e676. 10.1016/j.ijid.2009.11.011.View ArticlePubMedGoogle Scholar
- Guptill L: Bartonella infection in cats: what is the significance?. In Pract. 2012, 34: 434-445. 10.1136/inp.e5704.View ArticleGoogle Scholar
- Pape M, Manraveli K, Alexiou-Daniel S: Clinical aspects of Bartonella infection in northern Greece. Clin Microbiol Infect. 2009, 15 (Suppl 2): 91-92.View ArticlePubMedGoogle Scholar
- Vilibic-Cavlek T, Karlovoc-Martinovic D, Ljubin-Sternak S, Tabain I, Persic Z, Mlinaric-Galinovic G: High prevalence of Bartonella henselae and Bartonella quintana antibodies in Croatian patients presenting with lymphadenopathy. Polish J Microbiol. 2012, 61: 315-318.Google Scholar
- Potkonjak A, Lako B, Babić D, Lako B, Suvajdžić L, Stefančević M, Toholj B, Vraneš M: First report on seroepidemiological and clinical investigation of cat infection with Bartonella henselae in the area of Novi Sad, Serbia. Acta Vet (Beograd). 2011, 61: 183-192. 10.2298/AVB1103183P.View ArticleGoogle Scholar
- Sykes JE: Feline hemotropic mycoplasmas. Vet Clin North Am Small Anim Pract. 2010, 40: 1157-1170. 10.1016/j.cvsm.2010.07.003.View ArticlePubMedGoogle Scholar
- Tasker S: Haemotropic mycoplasmas – what’s their real significance in cats?. J Feline Med Surg. 2010, 12: 369-381. 10.1016/j.jfms.2010.03.011.PubMed CentralView ArticlePubMedGoogle Scholar
- Maher IE, Tasker S, Polizopoulou Z, Dasopoulou A, Egan K, Helps CR, Papasouliotis K: Polymerase chain reaction survey of feline haemotropic mycoplasma infections in Greece. J Feline Med Surg. 2010, 12: 601-605. 10.1016/j.jfms.2010.02.004.View ArticlePubMedGoogle Scholar
- Laberke S, Just F, Pfister K, Hartmann K: Prevalence of feline haemotropic mycoplasma infection in cats in Southern Bavaria, Germany, and infection risk factor analysis. Berl Munch Tierarztl Wochenschr. 2010, 123: 42-48.PubMedGoogle Scholar
- Roura X, Peters IR, Altet L, Tabar M-D, Barker EN, Planellas M, Helps CR, Francino O, Shaw SE, Tasker S: Prevalence of hemotropic mycoplasmas in healthy and unhealthy cats and dogs in Spain. J Vet Diag Invest. 2010, 22: 270-274. 10.1177/104063871002200219.View ArticleGoogle Scholar
- Willi B, Novacco M, Wolf-Jäckel GA, Boretti FS, Wengi N, Lutz H, Hofmann-Lehmann R: Haemotropic mycoplasmas of cats and dogs: transmission, diagnosis, prevalence and importance in Europe. Schweiz Archiv Tierheilk. 2010, 152: 237-244. 10.1024/0036-7281/a000055.View ArticleGoogle Scholar
- Morgenthal D, Hamel D, Arndt G, Silaghi C, Pfister K, Kempf VAJ, Kohn B: Prävalenz von hämotrophen Mycoplasma spp., Bartonella spp. und Anaplasma phagocytophilum bei Katzen im Raum Berlin/Brandenburg. Berl Munch Tierarztl Wochenschr. 2012, 125: 418-427.PubMedGoogle Scholar
- Martínez-Díaz V, Silvestre-Ferreira AC, Vilhena H, Pastor J, Francino O, Altet L: Prevalence and co-infection of haemotropic mycoplasmas in Portuguese cats by real-time polymerase chain reaction. J Feline Med Surg. 2013, 15: 879-885. 10.1177/1098612X13480985.View ArticlePubMedGoogle Scholar
- Tasker S, Binns SH, Day MJ, Gruffydd-Jones TJ, Harbour DA, Helps CR, Jensen WA, Oliver CS, Lappin MR: Use of a PCR assay to assess prevalence and risk factors for mycoplasma haemofelis and ‘Candidatus M. haemominutum’ in cats in the United Kingdom. Vet Rec. 2003, 152: 193-198. 10.1136/vr.152.7.193.View ArticlePubMedGoogle Scholar
- Tasker S, Braddock JA, Baral R, Helps CR, Day MJ, Gruffydd-Jones TJ, Malik R: Diagnosis of feline haemotropic mycoplasma infection in Australian cats using a real-time PCR assay. J Feline Med Surg. 2004, 6: 345-354. 10.1016/j.jfms.2003.12.003.View ArticlePubMedGoogle Scholar
- Gentilini F, Novacco M, Turba ME, Willi B, Bacci ML, Hofmann-Lehmann R: Use of combined conventional and real-time PCR to determine the epidemiology of feline haemotropic mycoplasma infections in northern Italy. J Feline Med Surg. 2009, 11: 277-285. 10.1016/j.jfms.2008.06.008.View ArticlePubMedGoogle Scholar
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.