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Prevalence of Borrelia burgdorferi sensu lato infection in Ixodes ricinus in Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics.
Uppsala University, Music and Museums, Museum of Evolution.
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1995 (English)In: Scandinavian Journal of Infectious Diseases, ISSN 0036-5548, E-ISSN 1651-1980, Vol. 27, no 6, 597-601 p.Article in journal (Refereed) Published
Abstract [en]

Between 1988-1991, a total of 3,141 Ixodes ricinus ticks, 2,740 adults and 401 nymphs, was collected from different localities in 23 of the 25 provinces of Sweden. The ticks were identified, dissected and examined for the presence of Borrelia spirochetes. Indirect immunofluorescence was performed, using an antiserum obtained from rabbits, immunized with sonicated, whole Borrelia burgdorferi spirochetes isolated from Swedish Ixodes ricinus ticks. Borrelia-positive I. ricinus were found in all 23 provinces. The prevalence of infection in adults ranged from 3% in Jämtland to 23% in Södermanland. In nymphs, the infection prevalence ranged from 0% in 9 provinces to 15% in Södermanland. A significantly greater proportion of the adult ticks were found to be positive for Borrelia in the southern and central parts of Sweden as compared to the northern part (Norrland). No significant difference in prevalence could be demonstrated between the western and eastern parts of Sweden. On average, 10% of the nymphs and 15% of the adult I. ricinus were positive for Borrelia. Of 41 non-I. ricinus ticks, none was positive for Borrelia. This study shows that Borrelia burgdorferi sensu lato is present throughout the distributional area of I. ricinus in Sweden. This should lead to increased awareness of signs and symptoms compatible with Lyme borreliosis in persons living in or visiting areas where I. ricinus is present.

Place, publisher, year, edition, pages
1995. Vol. 27, no 6, 597-601 p.
Keyword [en]
Animals, Arthropod Vectors/*microbiology, Borrelia burgdorferi Group/classification/*isolation & purification, Cats, Dogs, Humans, Incidence, Lyme Disease/epidemiology, Rabbits, Sweden/epidemiology, Ticks/*microbiology
National Category
Microbiology Immunology
URN: urn:nbn:se:uu:diva-16395DOI: 10.3109/00365549509047074PubMedID: 8685640OAI: oai:DiVA.org:uu-16395DiVA: diva2:44166
Available from: 2008-05-20 Created: 2008-05-20 Last updated: 2015-08-05Bibliographically approved

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Jaenson, Thomas G.T.Mejlon, Hans
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Department of Evolution, Genomics and SystematicsMuseum of Evolution
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