Crimean-Congo hemorrhagic fever in ticks (Acari: Ixodidae) and ruminants: field observations of an epizootic in Bandia, Senegal (1989-1992).
From 1989 to 1992, a longitudinal study of the relationships between different tick species and domestic ungulates in the transmission and amplification of Crimean-Congo hemorrhagic fever (CCHF) virus was undertaken in the Bandia area in Senegal where the presence of the virus had been reported previously. An epizootic occurred in 1991-1992 and 22 strains of CCHF virus were isolated from Hyalomma marginatum rufipes Koch, Amblyomma variegatum (F.), Rhipicephalus guilhoni Morel & Vassiliades, and R. evertsi evertsi Neumann ticks collected from cattle and goats. No human cases were reported. Transmission of CCHF virus in the area involves a complicated pattern including many tick species and hosts. Amplicons of the S fragment (536 bp) of the CCHF genome of 12 isolates from the study were obtained by polymerase chain reaction and analyzed by restriction-length fragment polymorphism. Three different genotypes of CCHF virus were identified and present during the epizootic. One genotype was recovered from A. variegatum, R. guilhoni, and R. e. evertsi and 2 genotypes were isolated from H. m. rufipes.
Zeller
H G
HG
Institut Pasteur, Laboratoire d'Epidemiologie des Arbovirus, Dakar, Senegal.
Cornet
J P
JP
Diop
A
A
Camicas
J L
JL
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000469:parasitology*; D015511:Goat Diseases / Q000453:epidemiology / Q000469:parasitology*; D006041:Goats; D006479:Hemorrhagic Fever, Crimean / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D006801:Humans; D012418:Ruminants / Q000469:parasitology*; D012675:Senegal / Q000453:epidemiology; D013987:Ticks / Q000469:parasitology*