Characterization ofBorrelia burgdorferi sensu lato strains isolated fromIxodes ricinus in Mecklenburg-Vorpommern, Germany

The survey is based on a total of 1263 records (738 isolations and 525 molecular DNA detections) of five Borrelia burgdorferi s.l. genomic groups available from 26 European countries: B. burgdorferi sensu stricto, B. afzelii, B. garinii, B. valaisiana (= VS116) and B. lusitaniae (= PoTiB2). It shows the geographic distribution, the source (ixodid ticks 802 records, fleas 2 records, mosquitoes 2 records, wild mammals 66 records, human patients 391 records) and the association of the genomic groups with particular clinical manifestations of Lyme borreliosis in humans (B. afzelii significantly prevails in skin lesions whereas B. garinii is more often associated with neuroborreliosis). The most frequent genomic groups in Europe are B. garinii (501 records) and B. afzelii (469 records). They occur across the continent and islands, whereas the third frequent genomic group, B. burgdorferi s.s. (201 records), has only rarely been isolated in eastern Europe. The remaining genomic groups, i.e. B. valaisiana (85 records) and B. lusitaniae (7 records) have only been isolated from, or detected in, Ixodes ricinus ticks in a few European countries.

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Younsi

Postić

Baranton

et al. 2001

European Journal of Epidemiology

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To investigate whether ticks of the genus Ixodes are infected by Borrelia burgdorferi complex, 490 unfed Ixodes ricinus ticks were collected by flagging in three different areas of Tunisia in 1998. DNAs extracted from 81 adults, 60 nymphs and 38 larvae were analysed after genic amplification of the non-coding spacer between the two copies of the rrl-rrf genes of B. burgdorferi sl. The prevalence of B. burgdorferi sl. in adults, nymphs and larvae was found to be 34, 33.3 and 2.6%, respectively. All DNAs (n = 61) but one were identified as belonging to different genotypes of B. lusitaniae by analysis of the restriction fragment length polymorphism of amplification products. In addition, 290 adults, 14 nymphs and 7 larvae were used to inoculate BSK-H medium to isolate spirochetes. Fifteen strains were isolated from adult ticks in the humid areas of Tunisia, whereas only one was obtained from larvae. Isolates were identified as B. lusitaniae (15/16) and B. garinii (1/16). These results provide new evidence for the existence of Lyme borreliosis in North Africa.

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Characterization ofBorrelia burgdorferi sensu lato strains isolated fromIxodes ricinus in Mecklenburg-Vorpommern, Germany

Cited by 4 publications

References 16 publications

Untersuchungen zur Epidemiologie der Borreliose im Freistaat Sachsen 1997

Untersuchungen zur Epidemiologie der Borreliose im Freistaat Sachsen 1997

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