Ecology and Epidemiology of Crimean-Congo Hemorrhagic Fever Virus Transmission in the Republic of Senegal
Abstract
Initial progress is reported for year 1 of a 3-year project to investigate the transmission ecology of tick-borne Crimean-Congo Hemorrhagic Fever virus (CCHFV) in the West African savannah. Long-term, prospective observations were begun a 3 sites in northern Senegal; other studies of virus and tick prevalence include Mauritania and The Gambia. Vertebrates and ticks were catalogued and components of their ecology described. At least 8 Ixodid tick species were identified including Hyalomma marginatum rufipes and H. truncatum. Initial results from more than 400 birds (42 species) and 500 small mammals (8 species) indicate these immature ticks are most active from August to october. Observations from 1,500 domestic ungulates demonstrate a more diffuse pattern for adults. Estimates of vertebrate density and host association are beings made. The temporal pattern of drop-off of adult and larval H. truncatum appears non-uniform. Studies of the reproductive capacity of numerous Hyalomma species have begun. studies of virus transmission in nature include measuring IgG antibody prevalence in vertebrates and infection rates in vectors to develop estimates of transmission frequencies between ticks stages or ticks and hosts.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1988
- Accession Number
- ADA206174
Entities
People
- Jean-pierre Digoutte
- Mark L. Wilson