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Epidemiological survey in a natural focus of Rickettsia transmitted by Ixodes ricinus in Switzerland


, : Epidemiological survey in a natural focus of Rickettsia transmitted by Ixodes ricinus in Switzerland. Annales de Parasitologie Humaine et Comparee 56(1): 1-8

A spotted fever group Rickettsia referred to as "Swiss agent" was detected in 8.5% of Ixodes ricinus collected in a marshy forest of the Swiss plateau. This organism, in its tick vector, was found to be transmitted stadially as well as ovarially; of 433 larval, nymphal or adult ticks from 17 parental tick females, all were infected. A total of 3,612 larval I. ricinus were collected from 168 small mammals including 127 Clethrionomys glareolus, 29 Apodemus sylvaticus and flavicolis, 7 Microtus agrestis, and 5 Sorex araneus from the same forest. 143 sera were obtained from these rodents: 114 (82%) had microagglutinating antibodies to the "Swiss agent".


Accession: 005375686

PMID: 7020557

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