Skip to main content

Small risk of developing symptomatic tick-borne diseases following a tick bite in the Netherlands



In The Netherlands, the incidence of Lyme borreliosis is on the rise. Besides its causative agent, Borrelia burgdorferi s.l., other potential pathogens like Rickettsia, Babesia and Ehrlichia species are present in Ixodes ricinus ticks. The risk of disease associated with these microorganisms after tick-bites remains, however, largely unclear. A prospective study was performed to investigate how many persons with tick-bites develop localized or systemic symptoms and whether these are associated with tick-borne microorganisms.


In total, 297 Ixodes ricinus ticks were collected from 246 study participants who consulted a general practitioner on the island of Ameland for tick bites. Ticks were subjected to PCR to detect DNA of Borrelia burgdorferi s.l., Rickettsia spp., Babesia spp. or Ehrlichia/Anaplasma spp.. Sixteen percent of the collected ticks were positive for Borrelia burgdorferi s.l., 19% for Rickettsia spp., 12% for Ehrlichia/Anaplasma spp. and 10% for Babesia spp.. At least six months after the tick bite, study participants were interviewed on symptoms by means of a standard questionnaire. 14 out of 193 participants (8.3%) reported reddening at the bite site and 6 participants (4.1%) reported systemic symptoms. No association between symptoms and tick-borne microorganisms was found. Attachment duration ≥24 h was positively associated with reddening at the bite site and systemic symptoms. Using logistic regression techniques, reddening was positively correlated with presence of Borrelia afzelii, and having 'any symptoms' was positively associated with attachment duration.


The risk of contracting acute Lyme borreliosis, rickettsiosis, babesiosis or ehrlichiosis from a single tick bite was <1% in this study population.


The most prevalent and widespread vector-borne disease of humans and animals in the northern hemisphere is Lyme borreliosis. Early detection of Lyme borreliosis is crucial, as antibiotics are most effective at this stage, preventing the development severe sequelae [1]. Over the last decade, the incidence of Lyme borreliosis has increased significantly in Europe, with up to 16 and 21 cases per 10,000 individuals reported in Scandinavia and Slovenia, respectively [2]. A periodical retrospective study under general practitioners in The Netherlands has shown a continuing and strong increase in general practitioner (GP) consultations for erythema migrans and hospital admissions in the past 15 years with 22000 cases in 2009. The most straightforward explanation for this increase is the concomitant increase in the number of GP consultations for tick bites [3, 4]. Although direct evidence is lacking, the factors responsible for this increase are most probably a combination of higher tick numbers and intensified human recreational behaviour, leading to an increased exposure of the population to tick bites.

The same tick species transmitting the etiologic agents of Lyme disease in Europe, Ixodes ricinus, also serves as vector of pathogens causing tick-borne encephalitis, babesiosis, several forms of rickettsioses and anaplasmoses. Incidences and public health risks of tick-borne diseases other than Lyme borreliosis are largely unknown in The Netherlands, but also in other countries. Although Dutch ticks have been shown to have a high prevalence of Rickettsia helvetica and can contain Babesia, so far no endemic disease cases in humans have been observed for these microorganisms [5]. R. helvetica is a intracellular bacterium that is suspected of causing acute perimyocarditis, unexplained febrile illness and sarcoidosis [611]. Various Babesia species are known to cause disease in humans and animals with Babesia divergens probably being the most important human pathogenic species in Europe but one European case of B. microti infection has been reported as well [1215]. Anaplasma and Ehrlichia have also been found in Dutch ticks and a few human cases have been reported in the Netherlands [16, 17].

Not only transmitted pathogens but also the tick itself can lead to health impairments. Ticks secrete a complex mixture of bio-active compounds, mainly proteins, during the blood meal [1820]. These can have local or systemic toxic effects or induce an immune response. Individuals rarely react with intense anaphylaxis but milder allergic reactions are probably more common and easily overlooked [2123].

The risk of developing Lyme borreliosis or any other tick-borne disease after a tick bite depends on many unrelated factors, including the tick species, the number of pathogens per tick, the site and duration of the tick bite, the (genetic) constitution of the pathogen and the individual susceptibility to infection [2426]. Many, if not all, of these factors may vary geographically and in time. Several prospective studies have estimated the risk of developing Lyme borreliosis following a tick bite, but not in The Netherlands, and rarely for other tick-borne diseases such as spotted fever rickettsiosis, babesiosis, and anaplasmosis [2730]. Data on Borrelia infection on patients and ticks from the years 2004-2006 were previously reported [31].

Field studies between 1989 and 1993 on the Dutch island of Ameland reported a B. burgdorferi s.l. prevalence in ticks of all life stages (n = 521) of 24% (95% CI: 20.7-28.0%) [32, 33], which led to an increased awareness of Lyme disease on the island. To estimate the risk of developing symptoms following tick bites and to investigate whether this risk is associated to specific tick-borne pathogens a study was initiated. Patients who consulted one GP on Ameland for a tick bite were invited to participate. They were asked to fill out a questionnaire on the day they visited the GP and were approached again several months later. The ticks were tested for Borrelia burgdorferi s.l.., Rickettsia spp., Babesia spp. and Ehrlichia/Anaplasma spp..

Materials and methods

Study participants

Between January 2004 and December 2008 ticks were collected from patients with one or more tick bites that consulted the GP in the village of Ballum on Ameland (53°44'41N, 5°68'43E). Ballum is the smallest village on Ameland with only about 370 citizens but about 500000 tourists visit this village yearly. This is represented in the composition of the study population of which only 20% was a resident of the island. Patients or their guardians were asked for an informed consent for testing the tick for various microorganisms and for collecting data via questionnaires or interviews. In a first questionnaire data were collected concerning, amongst others, the number of tick bites and duration of tick attachment. Approximately six months after the first visit to the GP patients were contacted by phone and interviewed. Some of the patients where only reached after 12 to 18 months. This second interview aimed at identifying possible symptoms related to the tick bite including local redness or erythema migrans and systemic symptoms as fever, malaise, palpitations, joint problems, or neurological symptoms, and if so whether they consulted a GP for this symptoms.

Removal and analysis of ticks

Ticks were carefully removed by the general practitioner and were immersed in 70% ethanol or a lysis buffer (0,5% sodium dodecyl sulfate; 100 mM tris-(hydroxymethyl) aminomethane; 10 mM ethylenediaminetetraacetic acid; 10 mM NaCl; pH: 8,3; 0,5 mg/ml protease K) and sent to the laboratory. Ticks stored in ethanol were determined to species level and DNA was extracted as described earlier [31]. Tick DNA extracts were analyzed by polymerase chain reaction (PCR) followed by reverse line blotting (RLB), as described elsewhere [34]. Primers and probes are described in Table 1.

Table 1 Primers and probes used in this study for PCR and RLB.


Outcomes were defined as redness on the site of the tick bite, and/or any systemic symptoms such as fever, malaise or pain. Risk factors that were investigated included positive PCR/RLB results for one of the micro-organisms (Borrelia, Rickettsia, Babesia or Ehrlichia/Anaplasma) in the ticks, any of these (= any micro-organism), duration (<24 h, between 24 h and 48 h, >48 h) and number of tick bites.

Firstly, we tested for all possible outcome - risk factor combinations, the strength of association (null hypothesis of unity odds ratio, i.e. no association). To this end, contingency tables were constructed and Fisher's exact tests were performed for each combination. All calculations were performed using R 2.11.1, using the 'Epi' package v1.1.17. For outcomes and binary risk factors (i.e. absence-presence of microorganisms), risk ratios and their 95% confidence intervals were computed. For non-binary risk factors categories were defined. Furthermore, we calculated the exact p-value for the hypothesis of unity odds-ratio.

For purposes of logistic regression, it is convenient to know what factors are associated at the 70% significance level [35]. Significant factors and categorical data (number of bites, number of days the tick was attached) were included in backwards logistic regressions for each outcome variable. Any combination of microorganism and days of attachment was also tested in the logistic regression.


Ticks were collected from 246 study participants. In total 297 ticks were removed ranging from 1 to 18 ticks per individual with an average of 1.2 ticks per individual. All ticks that were identified to species level were Ixodes ricinus. Life stages of 236 ticks could be determined microscopically. Of these ticks, 65 (28%) were adults, 133 (56%) were nymphs and 38 (16%) were larvae. At least 53 participants were bitten by adult ticks, 96 by nymphs and 16 by larvae. Two hundred-ninety-four ticks were tested for Borrelia burgdorferi s.l., Rickettsia spp. and Babesia spp., 286 ticks were also tested for Ehrlichia/Anaplasma spp.. One-hundred-ninety-three (78.5%) participants were reached for a second interview, 51 participants were lost to follow-up. For epidemiological analysis only data of the responding participants were used.

Of all tested ticks 58% were negative for all microorganisms tested for. 16% were positive for B. burgdorferi s.l., 19% for Rickettsia spp., 10% for Babesia spp. and 12% for Ehrlichia/Anaplasma spp.. The overall infection rate with B. burgdorferi s.l. was 16% (n = 294, CI 12.1-20.5%), which is significantly lower (p = 0.005) than in the early 90s (24% (n = 521, CI 20.7-28.0%) [32]. Different sub-species of B. burdorferi s.l. were found during this study of which B. afzelii was the most common one. Rickettsiae that were identified to species level were Rickettsia helvetica and Rickettsia monacensis. All but one Babesia species were identified as Babesia microti. The Ehrlichia/Anaplasma species identified were mainly Ehrlichia sp. schotti variant (recently named "Candidatus Neoehrlichia mikurensis"), one tick contained Anaplasma phagocytophilum and a last one could not be determined to species level. An overview on the identified microorganisms is given in Table 2. No larvae were found positive for Babesia and only one for Borrelia. Infection rates of the different life stages were calculated and are presented in figure 1.

Table 2 Different tick-borne microorganisms found in ticks collected from humans.
Figure 1

Prevalence of microorganisms in different tick stages. Ticks of different life stages were collected from humans and microorganisms were detected and identified using PCR followed by RLB. Bars indicate 95% confidence intervals calculated with Fisher's exact test.

In total 22 study participants reported symptoms of which 14 reported reddening around the tick bite site and 6 reported systemic symptoms and 2 reported both. This corresponds to an absolute risk of 11.4% for developing symptoms and 8.3% and 4.1%, respectively, for local reddening and systemic symptoms after a tick bite. Reddening at the bite site did not show the pattern of erythema migrans in any of the cases. Systemic symptoms included fever (n = 3), malaise (n = 3), fatigue (n = 3), panic attacks (n = 1), muscle pain (n = 1), joint pain (n = 1) or stiffness of the neck (n = 1). Three study participants reported symptoms but did not specify them further. Local reddening occurred and systemic symptoms occurred most frequently in participants bitten by an adult tick (n = 8 and n = 3, respectively) followed by those bitten by nymphs (n = 4 and n = 2) and larvae (n = 0 and n = 1). For the remaining cases life stages of ticks were not determined. Three 171 participants reported no symptoms. Eighty-four percent of the participants reported that the tick had been attached less than 24 hours while 4.7% reported that the tick had been attached for more than 48 hours. The occurrence of symptoms or reddening at the bite site was not correlated with the infectious state of the ticks (Table 3, 4, 5). However, a significant positive correlation (at 95% significance) was found between attachment duration of ticks (≥24 h) and symptoms. This was the case for redness (p = 0.08) and systemic symptoms (p = 0.02) analyzed individually and also when symptoms were analyzed conjointly (p = 0.009).

Table 3 Relative risks of developing any symptom correlated to various risk factors.
Table 4 Relative risks of developing redness at the bite site correlated to various risk factors.
Table 5 Relative risks of developing systemic symptoms correlated to various risk factors.

Fisher's exact test were significant (p < 0.30) at the 70% level for local redness with attachment duration of more than 24 h, more than 48 h, more than two tick bites and B. afzelii, for systemic symptoms with >24 h, Ehrlichia spp. and B. garinii infection of the tick and for any symptom with >24 h, >48 h, any infection of the tick, B. afzelii and Borrelia burgdorferi s.l.. Logistic regression with these factors and categorical data yielded no significant result for systemic symptoms. For redness, or any symptoms the following significant regression was found,

R = e 0.79 d e 1.1 A 36.6 + e 0.79 d e 1.1 A ,
G = e 0.8 d 21.8 + e 0.8 d ,

where R is the probability of redness at d days of tick presence and A indicates absence ('0') or presence ('1') of B. afzelii. G is the probability of systemic symptoms depending again on the number of days d. Logistic regression indicated the presence of one B. burgdorferi sub-species, B. afzelii, to be associated with local reddening (Figure 2). For example, 4 days of B. afzelii presence yields a probability of redness of 66%.

Figure 2

Probability of adverse effects after a tick bite. Described as a function of days of attachment and accounting for the presence/absence of B. afzelii. The formula describing this relationship can be found in the results section.


Tick bites may cause serious and lasting effects due to transmitted pathogens. Symptoms, especially localized ones, can also be due to reaction towards the tick itself. During this study several risk factors for developing localized and systemic symptoms were investigated. Ticks were tested for four different groups of micro-organisms. Statistical analysis showed none of the micro-organisms to be significantly associated to systemic symptoms but logistic regression indicated that B. afzelii might be associated with local reddening. In this study, only DNA of microorganisms was detected and identified in the ticks. This does not proof the presence of viable microorganisms neither does it tell something about their pathogenicity to humans. Therefore some of the PCR positive ticks might not have carried infectious agents at all and this could contribute to the absence of disease cases during this study. Future studies should aim to investigate whether these microorganisms, especially the less well studied Rickettsiaceae and Babesia species, are an emerging risk to public health.

Tick attachment duration was found to be strongly associated with an increased risk for developing localized reddening other than erythema migrans at the bite site as well as systemic symptoms. This association is most probably due to a direct response towards the tick or substances it secreted into the wound. Ticks secrete a complex mixture of compounds, some of which are potentially toxic, and which accumulate during the feeding process. Castelli et al.[36] described local reactions as result of tick bites. These included nodules, erythema and alopecia. A longer attachment period is likely to increase the risk of developing localized or systemic symptoms due to excreted tick proteins and also due to pathogens [37]. Timely removal of a tick is therefore a major factor to reduce transmission of potentially toxic tick excretions and tick-borne pathogens and our study supports that it significantly lowers the risk of developing symptoms.

Many microorganisms that do not live symbiotically in ticks need vertebrate hosts to maintain themselves in a tick population. However, transovarial transmission can contribute more or less to the maintenance of microorganisms in ticks, which seems to play a minor role for Ehrlichia/Anaplasma and a major role for Rickettsia spp.. The prevalence of these bacteria in larvae was already 8.1% and 26%, respectively. For Rickettsia spp. the prevalence was similar in adults, nymphs and larvae. This was observed in an earlier study as well and indicates that Rickettsiae are transmitted transovarially at a high degree and therefore rely only a little on vertebrate hosts [5]. It was observed that the prevalence of B. burgdorferi s.l. in ticks decreased significantly from 1989/1993 to 2004/2008. This seems to contradict findings that Lyme borreliosis is on the rise in the Netherlands [3, 4]. However, an increase in disease incidence is more likely due to an increased exposure of people to infected ticks. This can also be caused by a change in recreational behaviour or in the number of ticks present in the environment. Although these factors are difficult to measure and have not been measured during this study it seems likely that these and not an increase in infection rate are responsible for an increase in Lyme borreliosis incidence.


In our study, the overall risk of developing symptoms after a tick bite is 11.4% and most of these symptoms are restricted to local reactions. The risk of contracting symptoms of Lyme borreliosis after a single tick bite, even if the tick is infested with potential pathogens, is lower than 1%. Based upon the data collected in this study none of the participants developed symptomatic rickettsiosis, babesiosis or ehrlichiosis. This means that the risk of contracting overt symptoms one of these diseases was lower than 0.5% in this study population. The study shows that prompt removal of ticks reduces the risk of developing symptoms after a tick bite. Thorough checking for ticks together with appropriate clothing, tick avoiding behavior and use of insect repellents, is therefore the most powerful measure to prevent tick-borne diseases. Although the risk of developing symptoms after a tick bite is very low, timely removal of the tick is of an essence and this message should be promoted more clearly and with emphasis to the public.


  1. 1.

    Girschick HJ, Morbach H, Tappe D: Treatment of Lyme borreliosis. Arthritis Res Ther. 2009, 11: 258-10.1186/ar2853.

    PubMed Central  Article  PubMed  Google Scholar 

  2. 2.

    Smith R, Takkinen J: Lyme borreliosis: Europe-wide coordinated surveillance and action needed?. Euro Surveill. 2006, 11: E060622 060621-

    Google Scholar 

  3. 3.

    Hofhuis A, Giessen Jvd, Borgsteede F, Wielinga P, Notermans D, Pelt Wv: Lyme borreliosis in the Netherlands: strong increase in GP consultations and hospital admissions in past 10 years. Euro Surveill. 2006, 11:

    Google Scholar 

  4. 4.

    Hofhuis A, Harms MG, Giessen JWBvd, Sprong H, Notermans DW, Pelt Wv: Ziekte van Lyme in Nederland 1994-2009: Aantal huisartsconsulten blijft toenemen. Is voorlichting en curatief beleid genoeg?. Infectieziekten Bulletin. 2010, 21:

    Google Scholar 

  5. 5.

    Sprong H, Wielinga PR, Fonville M, Reusken C, Brandenburg AH, Borgsteede F, Gaasenbeek C, van der Giessen JW: Ixodes ricinus ticks are reservoir hosts for Rickettsia helvetica and potentially carry flea-borne Rickettsia species. Parasit Vectors. 2009, 2: 41-10.1186/1756-3305-2-41.

    PubMed Central  Article  PubMed  Google Scholar 

  6. 6.

    Nielsen H, Fournier PE, Pedersen IS, Krarup H, Ejlertsen T, Raoult D: Serological and molecular evidence of Rickettsia helvetica in Denmark. Scand J Infect Dis. 2004, 36: 559-563. 10.1080/00365540410020776.

    Article  PubMed  Google Scholar 

  7. 7.

    Fournier PE, Allombert C, Supputamongkol Y, Caruso G, Brouqui P, Raoult D: Aneruptive fever associated with antibodies to Rickettsia helvetica in Europe and Thailand. J Clin Microbiol. 2004, 42: 816-818. 10.1128/JCM.42.2.816-818.2004.

    PubMed Central  Article  PubMed  Google Scholar 

  8. 8.

    Nilsson K: Septicaemia with Rickettsia helvetica in a patient with acute febrile illness, rash and myasthenia. J Infect. 2009, 58: 79-82. 10.1016/j.jinf.2008.06.005.

    CAS  Article  PubMed  Google Scholar 

  9. 9.

    Nilsson K, Lindquist O, Pahlson C: Association of Rickettsia helvetica with chronic perimyocarditis in sudden cardiac death. Lancet. 1999, 354: 1169-1173. 10.1016/S0140-6736(99)04093-3.

    CAS  Article  PubMed  Google Scholar 

  10. 10.

    Cinco M, Luzzati R, Mascioli M, Floris R, Brouqui P: Serological evidence of Rickettsia infections in forestry rangers in north-eastern Italy. Clin Microbiol Infect. 2006, 12: 493-495. 10.1111/j.1469-0691.2006.01385.x.

    CAS  Article  PubMed  Google Scholar 

  11. 11.

    Nilsson K, Pahlson C, Lukinius A, Eriksson L, Nilsson L, Lindquist O: Presence of Rickettsia helvetica in granulomatous tissue from patients with sarcoidosis. J Infect Dis. 2002, 185: 1128-1138. 10.1086/339962.

    Article  PubMed  Google Scholar 

  12. 12.

    Hildebrandt A, Hunfeld KP, Baier M, Krumbholz A, Sachse S, Lorenzen T, Kiehntopf M, Fricke HJ, Straube E: First confirmed autochthonous case of human Babesia microti infection in Europe. Eur J Clin Microbiol Infect Dis. 2007, 26: 595-601. 10.1007/s10096-007-0333-1.

    CAS  Article  PubMed  Google Scholar 

  13. 13.

    Hunfeld KP, Hildebrandt A, Gray JS: Babesiosis: recent insights into an ancient disease. Int J Parasitol. 2008, 38: 1219-1237. 10.1016/j.ijpara.2008.03.001.

    CAS  Article  PubMed  Google Scholar 

  14. 14.

    Martinot M, Zadeh MM, Hansmann Y, Grawey I, Christmann D, Aguillon S, Jouglin M, Chauvin A, De Briel D: Babesiosis in immunocompetent patients, Europe. Emerg Infect Dis. 2011, 17: 114-116. 10.3201/eid1701.100737.

    PubMed Central  Article  PubMed  Google Scholar 

  15. 15.

    Kjemtrup AM, Conrad PA: Human babesiosis: an emerging tick-borne disease. Int J Parasitol. 2000, 30: 1323-1337. 10.1016/S0020-7519(00)00137-5.

    CAS  Article  PubMed  Google Scholar 

  16. 16.

    Doudier B, Olano J, Parola P, Brouqui P: Factors contributing to emergence of Ehrlichia and Anaplasma spp. as human pathogens. Vet Parasitol. 2010, 167: 149-154. 10.1016/j.vetpar.2009.09.016.

    CAS  Article  PubMed  Google Scholar 

  17. 17.

    van Dobbenburgh A, van Dam AP, Fikrig E: Human granulocytic ehrlichiosis in western Europe. N Engl J Med. 1999, 340: 1214-1216. 10.1056/NEJM199904153401517.

    CAS  Article  PubMed  Google Scholar 

  18. 18.

    Valenzuela JG: Exploring tick saliva: from biochemistry to 'sialomes' and functional genomics. Parasitology. 2004, 129 (Suppl): S83-94. 10.1017/S0031182004005189.

    CAS  Article  PubMed  Google Scholar 

  19. 19.

    Steen NA, Barker SC, Alewood PF: Proteins in the saliva of the Ixodida (ticks): pharmacological features and biological significance. Toxicon. 2006, 47: 1-20. 10.1016/j.toxicon.2005.09.010.

    CAS  Article  PubMed  Google Scholar 

  20. 20.

    Francischetti IM, Sa-Nunes A, Mans BJ, Santos IM, Ribeiro JM: The role of saliva in tick feeding. Front Biosci. 2009, 14: 2051-2088. 10.2741/3363.

    CAS  Article  Google Scholar 

  21. 21.

    Fernandez-Soto P, Davila I, Laffond E, Lorente F, Encinas-Grandes A, Perez-Sanchez R: Tick-bite-induced anaphylaxis in Spain. Ann Trop Med Parasitol. 2001, 95: 97-103. 10.1080/00034980020035960.

    CAS  Article  PubMed  Google Scholar 

  22. 22.

    Acero S, Blanco R, Bartolome B: Anaphylaxis due to a tick bite. Allergy. 2003, 58: 824-825. 10.1034/j.1398-9995.2003.00211.x.

    CAS  Article  PubMed  Google Scholar 

  23. 23.

    Beaudouin E, Kanny G, Guerin B, Guerin L, Plenat F, Moneret-Vautrin DA: Unusual manifestations of hypersensitivity after a tick bite: report of two cases. Ann Allergy Asthma Immunol. 1997, 79: 43-46. 10.1016/S1081-1206(10)63082-7.

    CAS  Article  PubMed  Google Scholar 

  24. 24.

    Lane RS, Piesman J, Burgdorfer W: Lyme borreliosis: relation of its causative agent to its vectors and hosts in North America and Europe. Annu Rev Entomol. 1991, 36: 587-609. 10.1146/annurev.en.36.010191.003103.

    CAS  Article  PubMed  Google Scholar 

  25. 25.

    Piesman J, Mather TN, Sinsky RJ, Spielman A: Duration of tick attachment and Borrelia burgdorferi transmission. J Clin Microbiol. 1987, 25: 557-558.

    PubMed Central  CAS  PubMed  Google Scholar 

  26. 26.

    Wang G, Ojaimi C, Wu H, Saksenberg V, Iyer R, Liveris D, McClain SA, Wormser GP, Schwartz I: Disease severity in a murine model of lyme borreliosis is associated with the genotype of the infecting Borrelia burgdorferi sensu stricto strain. J Infect Dis. 2002, 186: 782-791. 10.1086/343043.

    PubMed Central  CAS  Article  PubMed  Google Scholar 

  27. 27.

    Sood SK, Salzman MB, Johnson BJ, Happ CM, Feig K, Carmody L, Rubin LG, Hilton E, Piesman J: Duration of tick attachment as a predictor of the risk of Lyme disease in an area in which Lyme disease is endemic. J Infect Dis. 1997, 175: 996-999. 10.1086/514009.

    CAS  Article  PubMed  Google Scholar 

  28. 28.

    Costello CM, Steere AC, Pinkerton RE, Feder HM: A prospective study of tick bites in an endemic area for Lyme disease. Conn Med. 1989, 53: 338-340.

    CAS  PubMed  Google Scholar 

  29. 29.

    Nilsson K, Lukinius A, Pahlson C, Moron C, Hajem N, Olsson B, Lindquist O: Evidence of Rickettsia spp. infection in Sweden: a clinical, ultrastructural and serological study. Apmis. 2005, 113: 126-134. 10.1111/j.1600-0463.2005.apm1130206.x.

    Article  PubMed  Google Scholar 

  30. 30.

    Bjoersdorff A, Wittesjo B, Berglun J, Massung RF, Eliasson I: Human granulocytic ehrlichiosis as a common cause of tick-associated fever in Southeast Sweden: report from a prospective clinical study. Scand J Infect Dis. 2002, 34: 187-191. 10.1080/00365540110080061.

    Article  PubMed  Google Scholar 

  31. 31.

    Jacobs JJ, Noordhoek GT, Brouwers JM, Wielinga PR, Jacobs JP, Brandenburg AH: [Small risk of developing Lyme borreliosis following a tick bite on Ameland: research in a general practice]. Ned Tijdschr Geneeskd. 2008, 152: 2022-2026.

    CAS  PubMed  Google Scholar 

  32. 32.

    Rijpkema S, Nieuwenhuijs J, Franssen FF, Jongejan F: Infection rates of Borrelia burgdorferi in different instars of Ixodes ricinus ticks from the Dutch North Sea Island of Ameland. Exp Appl Acarol. 1994, 18: 531-542. 10.1007/BF00058936.

    CAS  Article  PubMed  Google Scholar 

  33. 33.

    Jongejan F, Rijpkema S: [Borrelia burgdorferi from Ixodes ricinus ticks on Ameland]. Tijdschr Diergeneeskd. 1989, 114: 1195-1197.

    CAS  PubMed  Google Scholar 

  34. 34.

    Tijsse-Klasen E, Fonville M, Reimerink JH, Spitzen-van der Sluijs A, Sprong H: Role of sand lizards in the ecology of Lyme and other tick-borne diseases in the Netherlands. Parasit Vectors. 2010, 3: 42-10.1186/1756-3305-3-42.

    PubMed Central  Article  PubMed  Google Scholar 

  35. 35.

    Dohoo I, Martin W, Stryhn H: Veterinary Epidemiological Research. 2007, Charlottetown: AVC Inc

    Google Scholar 

  36. 36.

    Castelli E, Caputo V, Morello V, Tomasino RM: Local reactions to tick bites. Am J Dermatopathol. 2008, 30: 241-248. 10.1097/DAD.0b013e3181676b60.

    Article  PubMed  Google Scholar 

  37. 37.

    Dana AN: Diagnosis and treatment of tick infestation and tick-borne diseases with cutaneous manifestations. Dermatol Ther. 2009, 22: 293-326. 10.1111/j.1529-8019.2009.01244.x.

    Article  PubMed  Google Scholar 

  38. 38.

    Wielinga PR, Gaasenbeek C, Fonville M, de Boer A, de Vries A, Dimmers W, Akkerhuis Op Jagers G, Schouls LM, Borgsteede F, van der Giessen JW: Longitudinal analysis of tick densities and Borrelia, Anaplasma, and Ehrlichia infections of Ixodes ricinus ticks in different habitat areas in The Netherlands. Appl Environ Microbiol. 2006, 72: 7594-7601. 10.1128/AEM.01851-06.

    PubMed Central  CAS  Article  PubMed  Google Scholar 

  39. 39.

    Rijpkema SG, Molkenboer MJ, Schouls LM, Jongejan F, Schellekens JF: Simultaneous detection and genotyping of three genomic groups of Borrelia burgdorferi sensu lato in Dutch Ixodes ricinus ticks by characterization of the amplified intergenic spacer region between 5S and 23S rRNA genes. J Clin Microbiol. 1995, 33: 3091-3095.

    PubMed Central  CAS  PubMed  Google Scholar 

  40. 40.

    Alekseev AN, Dubinina HV, Van De Pol I, Schouls LM: Identification of Ehrlichia spp. and Borrelia burgdorferi in Ixodes ticks in the Baltic regions of Russia. J Clin Microbiol. 2001, 39: 2237-2242. 10.1128/JCM.39.6.2237-2242.2001.

    PubMed Central  CAS  Article  PubMed  Google Scholar 

  41. 41.

    Christova I, Van De Pol J, Yazar S, Velo E, Schouls L: Identification of Borrelia burgdorferi sensu lato, Anaplasma and Ehrlichia species, and spotted fever group Rickettsiae in ticks from Southeastern Europe. Eur J Clin Microbiol Infect Dis. 2003, 22: 535-542. 10.1007/s10096-003-0988-1.

    CAS  Article  PubMed  Google Scholar 

  42. 42.

    Schouls LM, Van De Pol I, Rijpkema SG, Schot CS: Detection and identification of Ehrlichia, Borrelia burgdorferi sensu lato, and Bartonella species in Dutch Ixodes ricinus ticks. J Clin Microbiol. 1999, 37: 2215-2222.

    PubMed Central  CAS  PubMed  Google Scholar 

  43. 43.

    Bergmans AM, Groothedde JW, Schellekens JF, van Embden JD, Ossewaarde JM, Schouls LM: Etiology of cat scratch disease: comparison of polymerase chain reaction detection of Bartonella (formerly Rochalimaea) and Afipia felis DNA with serology and skin tests. J Infect Dis. 1995, 171: 916-923.

    CAS  Article  PubMed  Google Scholar 

  44. 44.

    Wielinga PR, Fonville M, Sprong H, Gaasenbeek C, Borgsteede F, Giessen JW: Persistent Detection of Babesia EU1 and Babesia microti in Ixodes ricinus in The Netherlands During a 5-Year Surveillance: 2003-2007. Vector Borne Zoonotic Dis. 2008

    Google Scholar 

  45. 45.

    Gubbels JM, de Vos AP, van der Weide M, Viseras J, Schouls LM, de Vries E, Jongejan F: Simultaneous detection of bovine Theileria and Babesia species by reverse line blot hybridization. J Clin Microbiol. 1999, 37: 1782-1789.

    PubMed Central  CAS  PubMed  Google Scholar 

Download references


We are grateful to Gerda Noordhoek and Marije Oosting for their valuable contributions in the first phases of this study. We thank Wilfrid van Pelt for critically reading the manuscript and his advice on data analysis. This study was financially supported by the Dutch Food and Consumer Product Safety Authority (VWA) and by the Ministry of Health, Welfare and Sport.

Author information



Corresponding authors

Correspondence to Afke H Brandenburg or Hein Sprong.

Additional information

Competing interests

The authors declare that they have no competing interests.

Authors' contributions

JJ and AB designed the study, JJ collected data and ticks, ETK, MF and AB performed lab tests and developed new methodology. AS and AH analyzed data and performed statistical analysis. JG supervised part of study. HS and JR wrote initial drafts and HS and ETK wrote the final manuscript. All authors read and approved the final manuscript.

Authors’ original submitted files for images

Below are the links to the authors’ original submitted files for images.

Authors’ original file for figure 1

Authors’ original file for figure 2

Rights and permissions

Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Tijsse-Klasen, E., Jacobs, J.J., Swart, A. et al. Small risk of developing symptomatic tick-borne diseases following a tick bite in the Netherlands. Parasites Vectors 4, 17 (2011).

Download citation


  • Lyme Disease
  • Systemic Symptom
  • Babesia
  • Borrelia Burgdorferi
  • Lyme Borreliosis