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  • Henningsson, AnnaRyhov County Hospital, Jönköping (author)

Low risk of seroconversion or clinical disease in humans after a bite by an Anaplasma phagocytophilum-infected tick

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • Elsevier,2015
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-122245
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122245URI
  • https://doi.org/10.1016/j.ttbdis.2015.07.005DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding text: Swedish Research Council; Medical Research Council of Southeast Sweden (FORSS); Futurum Academy of Healthcare; Jonkoping County Council; Interreg IV A Programme ScandTick; Division of Medical Services, Ryhov County Hospital, Jonkoping
  • The risk of contracting human granulocytic anaplasmosis (HGA) after a tick bite is mainly unknown. In this study we investigated the clinical and serological response in 30 humans bitten by ticks positive for Anaplasma phagocytophilum (Group A), 30 humans bitten by Borrelia burgdorferi sensu lato (s.l.)-positive ticks (Group B), and 30 humans bitten by ticks negative for both A. phagocytophilum and B. burgdorferi s.l. (Group C). Ticks, blood samples and questionnaires were collected from tick-bitten humans at 34 primary healthcare centres in Sweden and in the Åland Islands, Finland, at the time of the tick bite and after three months. A total of 2553 ticks detached from humans in 2007-2009 were analyzed by polymerase chain reaction, and 31 (1.2%) were positive for A. phagocytophilum, 556 (21.8%) were positive for B. burgdorferi s.l., and eight (0.3%) were co-infected by A. phagocytophilum and B. burgdorferi s.l. The overall prevalence of Anaplasma IgG antibodies in the included participants (n=90) was 17%, and there was no significant difference between the groups A-C. Only one of the participants (in Group C) showed a four-fold increase of IgG antibodies against A. phagocytophilum at the three-month follow-up, but reported no symptoms. The frequency of reported symptoms did not differ between groups A-C, and was unrelated to the findings of A. phagocytophilum and B. burgdorferi s.l. in the detached ticks. We conclude that the risk for HGA or asymptomatic seroconversion after a tick bite in Sweden or in the Åland Islands is low, even if the tick is infected by A. phagocytophilum.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Wilhelmsson, PeterLinköpings universitet,Avdelningen för mikrobiologi och molekylär medicin,Medicinska fakulteten(Swepub:liu)petwi60 (author)
  • Gyllemark, PaulaRyhov County Hospital, Jönköping (author)
  • Kozak Ljunggren, MonikaLinköpings universitet,Medicinska fakulteten,Avdelningen för cellbiologi(Swepub:liu)evako84 (author)
  • Matussek, AndreasRyhov County Hospital, Jönköping (author)
  • Nyman, DagRyhov County Hospital, Jönköping (author)
  • Ekerfelt, ChristinaBimelix Biomedical Laboratory, Mariehamn, Åland, Finland (author)
  • Lindgren, Per-EricLinköpings universitet,Avdelningen för mikrobiologi och molekylär medicin,Medicinska fakulteten,Ryhov County Hospital, Jönköping(Swepub:liu)perli15 (author)
  • Forsberg, PiaLinköpings universitet,Medicinska fakulteten,Avdelningen för mikrobiologi och molekylär medicin,Region Östergötland, Infektionskliniken i Östergötland(Swepub:liu)piafo27 (author)
  • Ryhov County Hospital, JönköpingAvdelningen för mikrobiologi och molekylär medicin (creator_code:org_t)

Related titles

  • In:Ticks and Tick-borne Diseases: Elsevier6:6, s. 787-7921877-959X1877-9603

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