Current status of L. infantum infection in stray cats in the Madrid region (Spain): implications for the recent outbreak of human leishmaniosis?
© Miró et al.; licensee BioMed Central Ltd. 2014
Received: 17 January 2014
Accepted: 4 March 2014
Published: 24 March 2014
Since 2009, the incidence of human leishmaniosis in the SW of the Madrid region has been unusually high. Although dogs are the main reservoir for this disease, a role played by dogs in this outbreak has been ruled out and investigators are now considering other hosts (eg. cats, rabbits, hares) as possible alternative reservoirs.
This study was designed to examine the Leishmania infantum status of stray cats in Madrid to assess its possible implications in the human leishmaniosis outbreak.
346 captured stray cats were tested for antibodies against L. infantum by the indirect fluorescent antibody technique (IFAT) and nested-PCR methods were used to detect Leishmania DNA in blood samples of cats testing seropositive for L. infantum and/or retroviruses infection. Cats were also tested for Toxoplasma gondii using the direct agglutination test (DAT) and feline leukemia virus (FeLV) antigen and feline immunodeficiency virus (FIV) antibodies (PetChek* FIV/FeLV). The presence of intestinal parasites was determined using a routine coprological method.
The seroprevalence of L. infantum infection (cut off ≥ 1/100) was 3.2% (11/346). However, it was not possible to amplify Leishmania DNA in any of the blood samples. Seropositivity was not associated with sex, age, capture site, clinical status, retrovirus infection or T. gondii seropositivity. Of the 11 cats seropositive for L. infantum, 3 also tested positive for FIV, none for FeLV and 6 for T. gondii. It should be mentioned that the prevalence of FeLV p27 antigen was 4% and of FIV antibody was 9.2%. Although the seroprevalence of T. gondii was quite high at 53.5%, no T. gondii oocysts were found in any of the faeces samples analysed (n = 287). In contrast, intestinal parasites were detected in 76 (26.5%) samples, Toxocara cati being the most prevalent.
Our results suggest a stable L. infantum infection situation among the stray cats of the Madrid area; the disease is uncommon and no clinical cases have been reported to date. The detection of other zoonotic parasites such as T. gondii and T. cati in stray cats indicates a need to adopt strict control measures in this population.
Leishmaniosis is a zoonotic disease caused by the protozoan Leishmania infantum. In Spain, the disease is transmitted by the female sandflies, Phlebotomus perniciosus and P. ariasi. Although dogs are considered the main reservoir, L. infantum has been detected in a wide range of mammalian species, including cats[1–4].
Because of its zoonotic nature, leishmaniosis has been a notifiable disease in Spain since 1982. Before 2009, the mean reported annual incidence of human leishmaniosis in the Madrid Autonomous Community (CM) was 1.12 cases/100,000 inhabitants. However, this incidence increased abruptly to 22.2 cases per 100,000 inhabitants from mid-2009 to the end of 2012 in the southwest region of Madrid. In total, 446 cases were reported: 6 in 2009, 97 in 2010, 196 in 2011 and 147 in 2012. Entomological and serological surveys in the area have surprisingly detected an infection rate in dogs of 1.6-2%. Other animals including cats, rats, rabbits, and hares from the affected area have also been examined. Preliminary results confirm the role that hares and rabbits could serve as wild reservoirs of leishmaniosis for the recent outbreak of visceral leishmaniosis in Madrid[8, 9]. Nevertheless, antibodies against L. infantum have also been detected in four cats and blood from cats was found in a gravid female P. perniciosus collected from the area affected by the outbreak.
In the past decade, several studies have been conducted in cats, and seroprevalences ranging from 0.9 to 59% have been reported in Mediterranean countries and Brazil. In Spain, L. infantum seroprevalence data on cat populations is still scarce and ranges from 1.3% in the central region to 28% in the South ((cut off ≥ 1/40); the real seroprevalence being 12.2% using a cut off ≥ 1:80). Prevalences detected by PCR have ranged from 0.3 to 26% for blood samples from cats in the Mediterranean area[11–13] and from 5.8 to 9.9% for bone marrow and lymph node samples from cats in Brazil[14, 15].
Despite the high prevalence of canine leishmaniosis in endemic areas, feline leishmaniosis is frequently subclinical. Over 40 clinical cases in cats have been described in the literature in Europe, South America and Texas. These cases were characterized by cutaneous lesions (nodular and ulcerative lesions), enlarged lymph nodes, weight loss and ocular lesions[11, 16–26]. Xenodiagnosis studies performed in two chronically infected cats have shown that a cat can be infectious to a competent L. infantum vector[22, 27]. However, the role of the cat in the transmission cycle of leishmaniosis is not clear, highlighting a need for further studies.
The present study was designed to determine the status of L. infantum infection among the stray cats inhabiting the central region of Spain (Madrid and two of its bordering provinces Toledo and Guadalajara) and to identify risk factors associated with the presence of infection/disease. These factors include coinfection with other pathogens mainly affecting outdoor cats: feline immunodeficiency virus (FIV), feline leukemia virus (FeLV), T. gondii and other intestinal parasites.
Every year in spring, the Animal Protection Society ALBA in Madrid undertakes a health control programme for stray cats. A large number of cats are captured to assess their health state and FeLV-FIV status and then healthy cats are sterilized before they are returned to their site of capture.
Clinical assessment consisted of sedation with a combination of 80 micrograms medetomidine/kg-5 mg ketamine/kg followed by a thorough physical exam and the collection of samples: blood (serum and EDTA) by jugular venipuncture, rectum and ear swabs, and skin scrapings if cutaneous lesions were observed. Samples were kept at 4°C until processed at the laboratory.
Serum antibody testing
For serological tests, specific antibodies to L. infantum were detected using the indirect immunofluorescence antibody test (IFAT) against in-house cultured promastigotes. The IFAT for anti-Leishmania-specific immunoglobulin G (IgG) antibodies was performed as described previously using a cut-off ≥ 1:100 to define seropositivity.
DNA was extracted from the blood samples of cats that had been identified as L. infantum seropositive and/or FeLV/FIV positive (n = 57) using the QIAamp DNA Mikro kit (QIAGEN). Extracted DNA was stored at -20°C until PCR was performed.
The parasite was detected using two nested PCR protocols. One was a nested-PCR targeting the Leishmania SSUrRNA gene (LnPCR) as described by Cruz et al.. This protocol is Leishmania genus specific and uses the primer pair R221 (5’-GGTTCCTTTCCTGATTTACG-3’) and R332 (5’-GGCCGGTAAAGGCCGAATAG-3’) in the first reaction. In this second mixture, the starting primers were replaced with the primers R223 (5’-TCCCATCGCAACCTCGGTT-3’) and R333 (5’-AAAGCGGGCGCGGTGCTG-3’). The PCR product amplification size was 603 bp in the first reaction and 353 bp in the nested PCR.
The second protocol was PCR amplification of a portion of the ITS-1n gene according to the protocol described by Schönian et al. but briefly modified. In this PCR, the region of the tandem ribosomal RNA genes (ITS-1) was amplified using the primers SAC (5'-CATTTTCCGATGATTACACC-3') and VAN2 (5'-GCGACACGTTATGTGAGCCG-3'). L. infantum DNA amplification was carried out in a 25 μl reaction volume containing 2.5 ul Buffer 10X (Biotools), 2 mM MgCl2; 0.5 ul dNTP mix 10 mM (Biotools), 0.5 ul of each primer (15 pmol/uL), 0.7 ul Tth DNA polymerase (1U/ul) (Biotools) and 10 ul of DNA. PCR amplification was performed in a thermal cycler at 80°C for 2 min, 94°C for 5 min, and 40 temperature cycles (94°C for 30 s, 57°C for 30 s, and 72°C for 30 s); this was followed by an extension step of 5 min at 72°C. The size of the PCR amplification product was 280–330 bp.
Toxoplasma gondii infection
Cat sera were tested for antibodies against T. gondii using a direct agglutination test (DAT) kit (Toxo-Screen DA; Biomerieux) as described by Desmonts and Remington (1980). An antibody titre of 1:40 was considered indicative of exposure of the cat population to T. gondii.
Cats were tested for FeLV antigen (p27) and FIV antibodies using a commercial ELISA kit (PetChek* FIV/FeLV; IDEXX Laboratories).
Other parasitological methods
Faeces samples were collected using a rectal swab. For coprological analysis, we used the modified Telemann sedimentation method plus merthiolate-iodine-formalin staining, followed by examination under a light microscope.
Ear swabs were also collected to determine the presence of ectoparasites, mainly Otodectes cynotis. Auricular secretions were examined under the microscope.
Whole skin was explored to detect the presence of skin lesions and during this process other ectoparasites were sometimes detected. When these were detected, they were stained in 70° alcohol until their identification under the microscope and/or magnification using identification keys[35, 36].
Correlations between all the variables examined were identified by the Chi-square test (SPSS 17.0). Significance was set at p < 0.05.
The study was carried out in accordance with Spanish Legislation guidelines (Ley 1/1990, Comunidad de Madrid) and the International Guiding Principles for Biomedical Research Involving Animals, issued by the Council for the International Organizations of Medical Sciences.
Of the 346 stray cats (146 male, 200 female) included in the study, 181 were enrolled in 2012 and 165 in 2013. Cats were grouped according to age: 6.3% (22/346) were kittens (under 6 months), 25.7% (89/346) were young (6 months to 1 year) and 67.9% (235/346) were estimated to be older than one year.
L . infantum infected cats according to sex, age, capture site and clinical signs compatible with leishmaniosis
L. infantum IFAT
< 6 months
6 months- 1 year
> 1 year
In a clinical examination, 326 cats were classed as healthy and 20 cats had clinical signs compatible with feline leishmaniosis. The clinical signs more frequently observed were skin lesions (alopecia and crusts), ocular lesions (eg. conjunctivitis, keratitis), weight loss and lymphadenomegaly.
The distribution of seropositive cats by capture site is shown in Figure 1. Leishmania infantum seroprevalences were 3.2% (11/346) as determined by IFAT (cut off ≥ 1:100): observed titres were 1:100 (n = 4) (sites 2, 3, 7, and one unknown), 1:200 (n = 5) (sites 4, 6, 7 (n = 2) and 8) and 1:400 (n = 2) (sites 1 and 11) (see Figure 1A for sites). In a further six cats, antibody titres were 1:50. This meant a percentage of cats with antibodies against L. infantum of 4.9% (17/346). Correlations between the seroprevalence data and sex, age, clinical signs and capture site are shown in Table 1. No significant differences in seroprevalence emerged according to these factors.
Blood samples from 57 cats testing seropositive for L. infantum and/or positive for feline retroviruses were subjected to PCR to detect the presence of L. infantum DNA. However, none of these tests proved positive.
Feline retroviruses (FeLV-FIV) were detected in 43 cats: 14 tested positive for FeLV infection, 32 for FIV and 3 cats were positive for both retroviruses.
Antibodies against T. gondii were detected in a high proportion of the animals (185 cats, 53.4%). However, T. gondii oocysts were not observed in faeces samples.
L . infantum infected cats and co-infection with feline immunodeficiency virus (FIV), feline leukemia virus (FeLV) or Toxoplasma gondii
L. infantum IFAT
T . gondii
Faecal samples were collected from 287 cats and intestinal parasites were detected in 76 (26.5%) of these samples. The intestinal parasites observed were: Toxocara cati (7.7%), Taenia spp. (6.9%), Cystoisospora spp. (6.3%), Giardia duodenalis (2.4%), Joyeuxyella spp. (1.7%), Dipylidium caninum (1.4%) and Aelurostrongylus abstrusus (0.3%).
In ear swab samples collected from 281 cats, 36 (12.8%) showed the presence of Otodectes cynotis. In some cats, other ectoparasites were also detected during physical examination: Ctenocephalides felis (n = 13), Felicola subrostratus (n = 2), Rhipicephalus sanguineus (n = 1) and Demodex spp (n = 1).
In this study, the seroprevalence of L. infantum in stray cats in Madrid and its neighbouring provinces was estimated at 3.2%. Prior studies have indicated similar seroprevalences for Madrid (1.3-3.7%)[3, 4] and other Mediterranean regions such as Greece, Portugal[38, 39], southern Italy and Israel (Jerusalem). In contrast, reported seroprevalences for Ibiza (13.2%) and southern Spain (28.3%) have been notably higher. These two regions are endemic for canine leishmaniosis and seroprevalences of L. infantum in dogs are also much higher than in other Spanish regions[43–45]. We should, however, mention that these rates are difficult to compare due to differences in the diagnostic techniques used (IFAT, ELISA), the cut-offs established, the sizes and origins of samples, and the season of study. There is a clear need to standardize protocols, establish cut-offs for the different techniques and define a gold standard procedure, as in the case of canine leishmaniosis[46, 47].
Despite these differences among the seroprevalence studies performed to date, the seroprevalence of L. infantum among cats observed here and in other studies has not substantially changed since the first studies conducted in Madrid[3, 4]. This trend has been paralleled by the L. infantum situation in dogs in Madrid, where the seroprevalence over the past 15 years has been stable at 6.4 to 8.1%[43, 48, 49], including the time period corresponding to an unusual outbreak of human leishmaniosis in SW Madrid.
Although PCR is a sensitive method, we were unable to detect L. infantum DNA in any of the blood samples testing seropositive for the pathogen. One possible reason for this inconsistency is that blood is not a good sample for this purpose or that the sample volume generally used is insufficient (100 μl)[2, 51]. Similar studies have also reported a low prevalence of Leishmania positivity detected by PCR in blood samples (0.3-0.6%) collected from cats in Madrid and N Portugal, where the seroprevalence is also lower (2.8-3.7%)[3, 12, 52]. Surveys in the Balearic Islands, S Spain and S Portugal have detected higher percentages of cats testing positive for Leishmania infection by PCR on blood samples (8.7-26%)[13, 38, 42, 53]. In these studies, however, seroprevalences were also higher (13.2-26%)[1, 42]. The findings of molecular studies from Brazil are not comparable to these data because the samples used for PCR were bone marrow, spleen and lymph nodes[14, 15, 54]. This type of sample probably should be the sample of choice yet has the drawback that invasive methods are needed for their collection. Also, with cats being smaller and more difficult to handle than dogs, samples are difficult to obtain. These limitations prompt a need to assess the sensitivity of the use of non invasive samples (eg. conjunctival swabs), as reported for canine leishmaniosis, for the PCR detection of Leishmania. Further molecular studies need to determine whether samples such as bone marrow, lymph nodes, conjunctival/oral swabs and/or skin will improve the detection of Leishmania DNA and diagnosis of the parasite[14, 42, 51].
In the current study, no significant correlation was found between L. infantum infection and sex, age or clinical status, as reported in similar studies[1, 41, 56]. According to the capture site, seroprevalences were higher in the E (8.8%) and NE of Madrid (10%) and in Guadalajara (8%), though differences were not significant (p = 0.13). Cats seropositive for L. infantum showed a homogenous distribution in the area of the human leishmaniosis (SW) outbreak, indicating that cats are not playing a role as a reservoir for L. infantum infection in this area.
Reported clinical cases of feline leishmaniosis are frequently associated with skin lesions as well as other less specific clinical signs (eg, lymph node enlargement, weight loss, ocular involvement), which can also be observed in other infectious diseases such as those produced by retroviruses. Accordingly, most cats developing clinical signs are suspected of having an impaired immune system. In our study, 5.7% (20/346) of the cats showed clinical signs compatible with feline leishmaniosis, of which, only one was seropositive for L. infantum antibodies. These results are in line with those of prior studies in which high proportions of seropositive dogs and/or cats showed no clinical signs of leishmaniosis[13, 14, 42, 48] and suggest the need for tests (e.g. serology, molecular diagnosis, etc.) in companion animals regardless of the presence of clinical signs, since in many cases the disease is underdiagnosed.
The prevalence of feline retroviruses (FeLV/FIV) in stray cats of our study area was consistent with the rates detected in previous studies[2, 42]. FeLV and FIV infections are frequently associated with opportunistic infections caused by protozoans, fungi, bacteria or viruses since these viruses may compromise the cellular immune response. Sobrinho et al., and Pennisi et al. reported feline leishmaniosis in association with FIV, while in a study performed by our group in Ibiza (Spain) association between L. infantum and FeLV was detected. In the present study, certain positive association was observed between Leishmania and retroviruses as reported in Jerusalem (Israel) and Brazil. However, since leishmaniosis is an immunomediated disease, future studies need to address possible correlations with immunosuppressive diseases or states (eg, retrovirus infections, neoplasias, treatment with corticosteroids, etc.)[2, 11].
Antibodies against T. gondii were detected in 53.4% of the stray cat population studied. This seroprevalence is similar to that reported by Aparicio et al. and Alonso et al. for stray cats in Madrid, though we previously observed a lower seroprevalence over the period of 2003–2007[61, 62]. The presence of cats testing seropositive for T. gondii is significant because, despite not detecting the oocysts of T. gondii in any faeces sample, these cats must have excreted oocysts sometime during their life, mainly when they were young. This could not be confirmed, however, due to the low numbers of kittens and young cats included in our study. Thus, the oocysts of T. gondii and other zoonotic parasites such as Giardia duodenalis and Toxocara cati, also detected here, could be present in the soils of public parks. In effect, Toxocara cati was the intestinal parasite appearing at the highest prevalence. Toxocara spp. (Toxocara cati and T. canis) are responsible for visceral larvae migrans (VLM) in humans and although, Toxocara canis is often more recognized as a zoonotic agent, Toxocara cati should not be overlooked[64, 65]. Moreover, some patients with ocular larva migrans (OLM) due to Toxocara spp. show a stronger reaction to the T. cati than T. canis antigen in the Ouchterlony test. It appears that T. cati may contribute to OLM and VLM in larger measure than was previously thought[64, 65]. The prevalence of the other intestinal parasites was similar to that detected in stray cats from other major cities such as Lisbon or Milan or even in other studies performed in Madrid[61, 62].
Prevalences of the ectoparasites Otodectes cynotis, Ctenocephalides felis, Rhipicephalus sanguineus and Felicola subrostratus were similar to those reported by others[39, 67]. As vectors for zoonotic diseases (eg, dipylidiosis, ricketsiosis, bartonellosis, etc.), many of these ectoparasites will have implications for public health.
In conclusion, the results of this study point to the stable situation of Leishmania infantum infection among the stray cats of Madrid and neighbouring areas (Toledo and Guadalajara), with clinical cases being rare. Further molecular and xenodiagnosis studies are, however, needed to clarify the epidemiological role of this alternative host. We suggest that veterinarians in canine leishmaniosis endemic areas should include leishmaniosis in the differential diagnosis of cats with compatible cutaneous or systemic clinical signs and inform cat owners of measures to prevent or reduce disease transmission. In addition, efficient repellents/insecticides to prevent sandfly bites need to be developed for use in cats.
The detection of other important zoonotic parasites such as Toxoplasma gondii, Toxocara cati, Giardia duodenalis, etc. in the stray cats analyzed identifies a need for appropriate control measures in this population.
We would like to thank all the veterinarians of ALBA for their collaboration in this study and the volunteers who captured the cats. The authors are also indebted to ALBA for their initiative to control cat colonies in Madrid.
This study was funded by Bayer HealthCare (Animal Health) and IDEXX (Spain).
- Martín-Sánchez J, Acedo C, Muñoz-Pérez M, Pesson B, Marchal O, Morillas-Márquez F: Infection by Leishmania infantum in cats: epidemiological study in Spain. Vet Parasitol. 2007, 145 (3–4): 267-273.View ArticlePubMedGoogle Scholar
- Solano-Gallego L, Rodríguez-Cortés A, Iniesta L, Quintana J, Pastor J, Espada Y, Portús M, Alberola J: Cross-sectional serosurvey of feline leishmaniasis in ecoregions around the Northwestern Mediterranean. Am J Trop Med Hyg. 2007, 76 (4): 676-680.PubMedGoogle Scholar
- Ayllón T, Diniz PP, Breitschwerdt EB, Villaescusa A, Rodríguez-Franco F, Sainz A: Vector-borne diseases in client-owned and stray cats from Madrid, Spain. Vector Borne Zoonotic Dis. 2012, 12 (2): 143-150.View ArticlePubMedGoogle Scholar
- Ayllon T, Tesouro MA, Amusategui I, Villaescusa A, Rodriguez-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.View ArticlePubMedGoogle Scholar
- Valcárcel Y, Bastero R, Anegón M, González S, Gil A: The epidemiology of hospital admissions due to leishmaniasis in Spain (1999–2003). Enferm Infecc Microbiol Clin. 2008, 26 (5): 278-281.View ArticlePubMedGoogle Scholar
- Arce A, Estirado A, Ordobas M, Sevilla S, García N, Moratilla L, de la Fuente S, Martínez AM, Pérez AM, Aránguez E, Iriso A, Sevillano O, Bernal J, Vilas F: Re-emergence of leishmaniasis in Spain: community outbreak in Madrid, Spain, 2009 to 2012. Euro Surveill. 2013, 18 (30): 20546-PubMedGoogle Scholar
- Carrillo E, Moreno J, Cruz I: What is responsible for a large and unusual outbreak of leishmaniasis in Madrid?. Trends Parasitol. 2013, 29 (12): 579-580.View ArticlePubMedGoogle Scholar
- Molina R, Jiménez MI, Cruz I, Iriso A, Martín-Martín I, Sevillano O, Melero S, Bernal J: The hare (Lepus granatensis) as potential sylvatic reservoir of Leishmania infantum in Spain. Vet Parasitol. 2012, 190 (1–2): 268-271.View ArticlePubMedGoogle Scholar
- Moreno I, Alvarez J, García N, de la Fuente S, Martínez I, Marino E, Toraño A, Goyache J, Vilas F, Domínguez L, Domínguez M: Detection of anti-Leishmania infantum antibodies in sylvatic lagomorphs from an epidemic area of Madrid using the indirect immunofluorescence antibody test. Vet Parasitol. 2014, 19 (3-4): 264-267.View ArticleGoogle Scholar
- Jiménez M, González E, Iriso A, Marco E, Alegret A, Fúster F, Molina R: Detection of Leishmania infantum and identification of blood meals in Phlebotomus perniciosus from a focus of human leishmaniasis in Madrid, Spain. Parasitol Res. 2013, 112 (7): 2453-2459.View ArticlePubMedGoogle Scholar
- Pennisi MG, Hartmann K, Lloret A, Addie D, Belák S, Boucraut-Baralon C, Egberink H, Frymus T, Gruffydd-Jones T, Hosie MJ, Lutz H, Marsilio F, Möstl K, Radford AD, Thiry E, Truyen U, Horzinek MC: Leishmaniosis in cats: ABCD guidelines on prevention and management. J Feline Med Surg. 2013, 15 (7): 638-642.View ArticlePubMedGoogle Scholar
- Vilhena H, Martinez-Díaz VL, Cardoso L, Vieira L, Altet L, Francino O, Pastor J, Silvestre-Ferreira AC: Feline vector-borne pathogens in the north and centre of Portugal. Parasit Vectors. 2013, 6: 99-PubMed CentralView ArticlePubMedGoogle Scholar
- Millán J, Zanet S, Gomis M, Trisciuoglio A, Negre N, Ferroglio E: An investigation into alternative reservoirs of canine leishmaniasis on the endemic island of Mallorca (Spain). Transbound Emerg Dis. 2011, 58 (4): 352-357.View ArticlePubMedGoogle Scholar
- Sobrinho LS, Rossi CN, Vides JP, Braga ET, Gomes AA, de Lima VM, Perri SH, Generoso D, Langoni H, Leutenegger C, Biondo AW, Laurenti MD, Marcondes M: Coinfection of Leishmania chagasi with Toxoplasma gondii, Feline Immunodeficiency Virus (FIV) and Feline Leukemia Virus (FeLV) in cats from an endemic area of zoonotic visceral leishmaniasis. Vet Parasitol. 2012, 187 (1–2): 302-306.View ArticlePubMedGoogle Scholar
- Coelho WM, Richini-Pereira VB, Langoni H, Bresciani FD: Molecular detection of Leishmania sp. in cats (Felis catus) from Andradina Municipality, São Paulo State, Brazil. Vet Parasitol. 2011, 176 (2–3): 281-282.View ArticlePubMedGoogle Scholar
- Hervás J, Chacón-M De Lara F, Sánchez-Isarria MA, Pellicer S, Carrasco L, Castillo JA, Gómez-Villamandos JC: Two cases of feline visceral and cutaneous leishmaniosis in Spain. J Feline Med Surg. 1999, 1 (2): 101-105.View ArticlePubMedGoogle Scholar
- Hervás J, Chacón-Manrique Delara F, López J, Gómez-Villamandos JC, Guerrero MJ, Moreno A: Granulomatous (pseudotumoral) iridociclitis associated with leishmaniasis in a cat. Vet Rec. 2001, 149 (20): 624-625.View ArticlePubMedGoogle Scholar
- Ozon C, Marty P, Pratlong F, Breton C, Blein M, Lelièvre A, Haas P: Disseminated feline leishmaniosis due to Leishmania infantum in Southern France. Vet Parasitol. 1998, 75 (2–3): 273-277.View ArticlePubMedGoogle Scholar
- Poli A, Abramo F, Barsotti P, Leva S, Gramiccia M, Ludovisi A, Mancianti F: Feline leishmaniosis due to Leishmania infantum in Italy. Vet Parasitol. 2002, 106 (3): 181-191.View ArticlePubMedGoogle Scholar
- Grevot A, Jaussaud Hugues P, Marty P, Pratlong F, Ozon C, Haas P, Breton C, Bourdoiseau G: Leishmaniosis due to Leishmania infantum in a FIV and FelV positive cat with a squamous cell carcinoma diagnosed with histological, serological and isoenzymatic methods. Parasite. 2005, 12 (3): 271-275.View ArticlePubMedGoogle Scholar
- Rüfenacht S, Sager H, Müller N, Schaerer V, Heier A, Welle MM, Roosje PJ: Two cases of feline leishmaniosis in Switzerland. Vet Rec. 2005, 156 (17): 542-545.View ArticlePubMedGoogle Scholar
- Maroli M, Pennisi MG, Di Muccio T, Khoury C, Gradoni L, Gramiccia M: Infection of sandflies by a cat naturally infected with Leishmania infantum. Vet Parasitol. 2007, 145 (3–4): 357-360.View ArticlePubMedGoogle Scholar
- Navarro JA, Sánchez J, Peñafiel-Verdú C, Buendía AJ, Altimira J, Vilafranca M: Histopathological lesions in 15 cats with leishmaniosis. J Comp Pathol. 2010, 143 (4): 297-302.View ArticlePubMedGoogle Scholar
- Verneuil M: Ocular leishmaniasis in a cat: case report. J Fr Ophtalmol. 2013, 36 (4): e67-e72.View ArticlePubMedGoogle Scholar
- Rougeron V, Catzeflis F, Hide M, De Meeûs T, Bañuls AL: First clinical case of cutaneous leishmaniasis due to Leishmania (Viannia) braziliensis in a domestic cat from French Guiana. Vet Parasitol. 2011, 181 (2–4): 325-328.View ArticlePubMedGoogle Scholar
- Trainor KE, Porter BF, Logan KS, Hoffman RJ, Snowden KF: Eight cases of feline cutaneous leishmaniasis in Texas. Vet Pathol. 2010, 47 (6): 1076-1081.View ArticlePubMedGoogle Scholar
- da Silva SM, Rabelo PF, Gontijo NF, Ribeiro RR, Melo MN, Ribeiro VM, Michalick MS: First report of infection of Lutzomyia longipalpis by Leishmania (Leishmania) infantum from a naturally infected cat of Brazil. Vet Parasitol. 2010, 174 (1–2): 150-154.View ArticlePubMedGoogle Scholar
- Maia C, Campino L: Can domestic cats be considered reservoir hosts of zoonotic leishmaniasis?. Trends Parasitol. 2011, 27 (8): 341-344.View ArticlePubMedGoogle Scholar
- Verstegen J, Fargetton X, Ectors F: Medetomidine/ketamine anaesthesia in cats. Acta Vet Scand Suppl. 1989, 85: 117-123.PubMedGoogle Scholar
- Cruz I, Cañavate C, Rubio JM, Morales MA, Chicharro C, Laguna F, Jiménez-Mejías M, Sirera G, Videla S, Alvar J: A nested polymerase chain reaction (Ln-PCR) for diagnosing and monitoring Leishmania infantum infection in patients co-infected with human immunodeficiency virus. Trans R Soc Trop Med Hyg. 2002, 96 (Suppl 1): S185-S189.View ArticlePubMedGoogle Scholar
- Schönian G, Nasereddin A, Dinse N, Schweynoch C, Schallig HD, Presber W, Jaffe CL: PCR diagnosis and characterization of Leishmania in local and imported clinical samples. Diagn Microbiol Infect Dis. 2003, 47 (1): 349-358.View ArticlePubMedGoogle Scholar
- Desmonts G, Remington JS: Direct agglutination test for diagnosis of Toxoplasma infection: method for increasing sensitivity and specificity. J Clin Microbiol. 1980, 11 (6): 562-568.PubMed CentralPubMedGoogle Scholar
- Tonelli QJ: Enzyme-linked immunosorbent assay methods for detection of feline leukemia virus and feline immunodeficiency virus. J Am Vet Med Assoc. 1991, 199 (10): 1336-1339.PubMedGoogle Scholar
- Thiepont D, Rochette F, Vanparijs F: Diagnostic de verminose par examen coprologique. Edited by: Janssen Research Foundation. 1979, Beerse, Belgique: Belgique, 35-36.Google Scholar
- Krämer F, Mencke N: Flea Biology and Control. 2001, Germany: SpringerView ArticleGoogle Scholar
- Miró G: vol. I. Atlas de Dermatología del Perro y el Gato. Enfermedades Infecciosas y Parasitarias. 2004, Madrid, SpainGoogle Scholar
- Diakou A, Papadopoulos E, Lazarides K: Specific anti-Leishmania spp. antibodies in stray cats in Greece. J Feline Med Surg. 2009, 11 (8): 728-730.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 (3–4): 336-340.View ArticlePubMedGoogle Scholar
- Duarte A, Castro I, da Fonseca IM P, Almeida V, de Carvalho LM M, Meireles J, Fazendeiro MI, Tavares L, Vaz Y: Survey of infectious and parasitic diseases in stray cats at the Lisbon Metropolitan Area, Portugal. J Feline Med Surg. 2010, 12 (6): 441-446.View ArticlePubMedGoogle Scholar
- Pennisi M, Lupo T, Malara D, Massuci 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
- Nasereddin A, Salant H, Abdeen Z: Feline leishmaniasis in Jerusalem: serological investigation. Vet Parasitol. 2008, 158 (4): 364-369.View ArticlePubMedGoogle Scholar
- Sherry K, Miró G, Trotta M, Miranda C, Montoya A, Espinosa C, Ribas F, Furlanello T, Solano-Gallego L: A serological and molecular study of Leishmania infantum infection in cats from the Island of Ibiza (Spain). Vector Borne Zoonotic Dis. 2011, 11 (3): 239-245.View ArticlePubMedGoogle Scholar
- Miró G, Montoya A, Roura X, Gálvez R, Sainz A: Seropositivity rates for agents of canine vector-borne diseases in Spain: a multicentre study. Parasit Vectors. 2013, 6: 117-PubMed CentralView ArticlePubMedGoogle Scholar
- Martín-Sánchez J, Morales-Yuste M, Acedo-Sánchez C, Barón S, Díaz V, Morillas-Márquez F: Canine leishmaniasis in southeastern Spain. Emerg Infect Dis. 2009, 15 (5): 795-798.PubMed CentralView ArticlePubMedGoogle Scholar
- Suárez Rodríguez B, Isidoro Fernández B, Santos Sanz S, Sierra Moros MJ, Molina Moreno R, Astray Mochales J, Amela Heras C: Review of the current situation and the risk factors of Leishmania infantum in Spain. Rev Esp Salud Publica. 2012, 86 (6): 555-564.PubMedGoogle Scholar
- Solano-Gallego L, Koutinas A, Miró G, Cardoso L, Pennisi MG, Ferrer L, Bourdeau P, Oliva G, Baneth G: Directions for the diagnosis, clinical staging, treatment and prevention of canine leishmaniosis. Vet Parasitol. 2009, 165 (1–2): 1-18.View ArticlePubMedGoogle Scholar
- Solano-Gallego L, Miró G, Koutinas A, Cardoso L, Pennisi MG, Ferrer L, Bourdeau P, Oliva G, Baneth G, The LeishVet Group: LeishVet guidelines for the practical management of canine leishmaniosis. Parasit Vectors. 2011, 4: 86-PubMed CentralView ArticlePubMedGoogle Scholar
- Miró G, Montoya A, Mateo M, Alonso A, García S, García A, Caballero MJ, Molina R: A leishmaniosis surveillance system among stray dogs in the region of Madrid: ten years of serodiagnosis (1996–2006). Parasitol Res. 2007, 101 (2): 253-257.View ArticlePubMedGoogle Scholar
- Gálvez R, Miró G, Descalzo MA, Nieto J, Dado D, Martín O, Cubero E, Molina R: Emerging trends in the seroprevalence of canine leishmaniasis in the Madrid region (central Spain). Vet Parasitol. 2010, 169 (3–4): 327-334.View ArticlePubMedGoogle Scholar
- Cruz I, Millet A, Carrillo E, Chenik M, Salotra P, Verma S, Veland N, Jara M, Adaui V, Castrillón C, Arévalo J, Moreno J, Cañavate C: An approach for interlaboratory comparison of conventional and real-time PCR assays for diagnosis of human leishmaniasis. Exp Parasitol. 2013, 134 (3): 281-289.View ArticlePubMedGoogle Scholar
- Vita S, Santori D, Aguzzi I, Petrotta E, Luciani A: Feline leishmaniasis and ehrlichiosis: serological investigation in Abruzzo region. Vet Res Commun. 2005, 29 (Suppl 2): 319-321.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 (1–2): 37-42.View ArticlePubMedGoogle Scholar
- Maia C, Nunes M, Campino L: Importance of cats in zoonotic leishmaniasis in Portugal. Vector Borne Zoonotic Dis. 2008, 8 (4): 555-559.View ArticlePubMedGoogle Scholar
- Vides JP, Schwardt TF, Sobrinho LS, Marinho M, Laurenti MD, Biondo AW, Leutenegger C, Marcondes M: Leishmania chagasi infection in cats with dermatologic lesions from an endemic area of visceral leishmaniosis in Brazil. Vet Parasitol. 2011, 178 (1–2): 22-28.View ArticlePubMedGoogle Scholar
- Strauss-Ayali D, Jaffe CL, Burshtain O, Gonen L, Baneth G: Polymerase chain reaction using noninvasively obtained samples, for the detection of Leishmania infantum DNA in dogs. J Infect Dis. 2004, 189 (9): 1729-1733.View ArticlePubMedGoogle Scholar
- Coelho WM, Do Amarante AF, Apolinário JC, Coelho NM, de Lima VM, Perri SH, Bresciani KD: Seroepidemiology of Toxoplasma gondii, Neospora caninum, and Leishmania spp. infections and risk factors for cats from Brazil. Parasitol Res. 2011, 109 (4): 1009-1013.View ArticlePubMedGoogle Scholar
- Mancianti F: Feline leishmaniasis: what's the epidemiological role of the cat?. Parassitologia. 2004, 46 (1–2): 203-206.PubMedGoogle Scholar
- Baneth G, Koutinas AF, Solano-Gallego L, Bourdeau P, Ferrer L: Canine leishmaniosis - new concepts and insights on an expanding zoonosis: part one. Trends Parasitol. 2008, 24 (7): 324-330.View ArticlePubMedGoogle Scholar
- Aparicio Garrido J, Cour Boveda I, Berzosa Aguilar AMJPM: Study on the epidemiology of toxoplasmosis. Infection in the domestic cat in suburbs of Madrid. Serological and copro-parasitological study. Med Trop (Madr). 1972, 48: 24-39.Google Scholar
- Alonso A, Quintanilla-Gozalo A, Rodríguez M, Pereira-Bueno J, Ortega-Mora L, Miró G: Seroprevalencia de la infección por Toxoplasma gondii en gatos vagabundos en el área de Madrid. Acta Parasitológica Portuguesa. 1997, 12:Google Scholar
- Miró G, Montoya A, Jiménez S, Frisuelos C, Mateo M, Fuentes I: Prevalence of antibodies to Toxoplasma gondii and intestinal parasites in stray, farm and household cats in Spain. Vet Parasitol. 2004, 126 (3): 249-255.View ArticlePubMedGoogle Scholar
- Montoya A: La infección por Toxoplasma gondii en el gato: aspectos epidemiológicos, diagnóstico y caracterización de aislados autóctonos. 2007, Madrid: Universidad Complutense de MadridGoogle Scholar
- Dado D, Izquierdo F, Vera O, Montoya A, Mateo M, Fenoy S, Galván AL, García S, García A, Aránguez E, López L, del águila C, Miró G: Detection of zoonotic intestinal parasites in public parks of Spain, Potential epidemiological role of microsporidia. Zoonoses Public Health. 2012, 59 (1): 23-28.View ArticlePubMedGoogle Scholar
- Fisher M: Toxocara cati: an underestimated zoonotic agent. Trends Parasitol. 2003, 19 (4): 167-170.View ArticlePubMedGoogle Scholar
- Lee AC, Schantz PM, Kazacos KR, Montgomery SP, Bowman DD: Epidemiologic and zoonotic aspects of ascarid infections in dogs and cats. Trends Parasitol. 2010, 26 (4): 155-161.View ArticlePubMedGoogle Scholar
- Spada E, Proverbio D, Della Pepa A, Perego R, Baggiani L, DeGiorgi GB, Domenichini G, Ferro E, Cremonesi F: Seroprevalence of feline immunodeficiency virus, feline leukaemia virus and Toxoplasma gondii in stray cat colonies in northern Italy and correlation with clinical and laboratory data. J Feline Med Surg. 2012, 14 (6): 369-377.View ArticlePubMedGoogle Scholar
- Salant H, Mumcuoglu KY, Baneth G: Ectoparasites in urban stray cats in Jerusalem, Israel: differences in infestation patterns of fleas, ticks and permanent ectoparasites. Med Vet Entomol. 2013, doi: 10.1111/mve.12032Google Scholar
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