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  4. Relationship between <i>Borrelia burgdorferi</i> sensu lato species, red squirrels (<i>Sciurus vulgaris</i>) and <i>Ixodes ricinus</i> in enzootic areas in Switzerland
 
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Relationship between <i>Borrelia burgdorferi</i> sensu lato species, red squirrels (<i>Sciurus vulgaris</i>) and <i>Ixodes ricinus</i> in enzootic areas in Switzerland

Auteur(s)
Humair, Pierre-François
Editeur(s)
Gern, Lise 
Institut de biologie 
Date de parution
1998
In
Acta Tropica, 1998/69/213-227
Mots-clés
  • Lyme borreliosis

  • Ecology

  • <i>Sciurus vulgaris</...

  • Host

  • <i>Ixodes ricinus</i>...

  • <i>Borrelia burgdorfe...

Résumé
The infection and reservoir status of red squirrels (<i>Sciurus vulgaris</i>) for <i>Borrelia burgdorferi</i> sensu lato were studied in Switzerland. <i>B. burgdorferi</i> sensu lato was isolated from 15 skin samples from 4/6 dead red squirrels, victims of road traffic. Isolates were identified using restriction fragment length polymorphism (RFLP): <i>B. burgdorferi</i> sensu stricto was present in 14 culture tubes containing skin samples and <i>B. afzelii</i> in two other tubes. A mixed infection was revealed in one case. A total of 227 ticks attached to squirrels were cultivated in BSKII medium and 90 isolates were obtained. Genotypic identification by RFLP showed that <i>B. afzelii</i> (59%) and <i>B. burgdorferi</i> sensu stricto (46%) dominated in ticks feeding on red squirrels. Data collected from one particular animal, highly infested with <i>Ixodes ricinus</i> and harbouring numerous <i>Borrelia</i>-infected <i>Ixodes ricinus</i> ticks, showed that transmission of <i>B. burgdorferi</i> sensu lato occurred from <i>S. vulgaris</i> to feeding ticks. More precisely, <i>B. burgdorferi</i> sensu stricto and <i>B. afzelii</i> were mainly transmitted from <i>S. vulgaris</i> to ticks. The present data emphasized the results obtained previously from small rodents and birds in Japan and in Switzerland, showing the occurrence of specific associations between host species and <i>Borrelia</i> genospecies.
URI
https://libra.unine.ch/handle/123456789/18749
DOI
10.1016/S0001-706X(97)00126-5
Autre version
http://dx.doi.org/10.1016/S0001-706X(97)00126-5
Type de publication
Resource Types::text::journal::journal article
Dossier(s) à télécharger
 main article: 1_Humair_Jean-Fran__ois_-_Relationship_between_Borrelia_burgdorferi_20060516.pdf (578.41 KB)
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