title: [Epidemiology of Cowdria infection in Senegal. II. Results of sero-epidemiological follow-up studies].
abstract: The authors report the results of sero-epidemiological monitoring of Zebu, Diakoré and Ndama cattle in the Sahel, Niayes and North Guinea zones, respectively. Calves aged 0-3 or 3-6 months were subjected to blood sampling every three months for a period of 20 months. In the Niayes and North Guinea zones, the immunofluorescence test showed that about 70% of 0-1 month old calves reacted positively to the Cowdria ruminantium antigen, whereas the prevalence was 92% between 3 and 6 months. After the age of 6 months, the results were 100% positive. In the Sahelian area, the prevalence of the infection was null. Results obtained with a sample of about 100 adult cattle from the Sahel, Niayes, North Sudan and North Guinea zones, showed a good correlation between positivity rates and the size of Amblyomma variegatum populations.
authors.affiliation: ISRA-LNERV, Dakar-Hann, Sénégal.
authors.forename: A
authors.initials: A
authors.lastname: Gueye
authors.forename: D
authors.initials: D
authors.lastname: Martinez
authors.forename: M B
authors.initials: MB
authors.lastname: Mbengue
authors.forename: T H
authors.initials: TH
authors.lastname: Dieye
authors.forename: A
authors.initials: A
authors.lastname: Diouf
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D005260:Female; D005500:Follow-Up Studies; D006357:Heartwater Disease / Q000453:epidemiology*; D008297:Male; D015995:Prevalence; D012675:Senegal / Q000453:epidemiology; D012698:Serologic Tests
vernacular_title: Epidémiologie de la cowdriose au Sénégal. II. Résultats de suivis séro-épidemiologiques.