title: A study on African animal trypanosomosis in four areas of Senegal.
abstract: In Senegal, several areas provide great potential for agriculture and animal production, but African animal trypanosomosis (AAT) is one of the major constraints to the development of more effective livestock production systems. A study was conducted to assess the current situation of AAT in this country. Surveys were carried out between June 2011 and September 2012 in four different areas: Dakar, Sine Saloum, Kedougou region and Basse Casamance in several animal species: dogs (152), donkeys (23), horses (63), sheep (43), goats (52) and cattle (104), distributed in the four sites. Molecular tools (PCR) indicated 3.4% positive animals including dogs, donkeys, a goat and cattle. The savannah type of Trypanosoma congolense Broden, 1904 (53% of positive cases) and the forest type of T. congolense (subgenus Nannomonas Hoare, 1964) were predominant. Trypanosoma vivax Ziemann, 1905 (subgenus Duttonella Chalmers, 1918) was only present in one animal and no trypanosome of the subgenus Trypanozoon Lühe, 1906 was found. Half of the positive cases were detected in Sine Saloum, where T. congolense savannah-type was predominant, and the other half in Basse Casamance, where T. congolense forest-type was predominant; no cases were found in Dakar or in the Kedougou region. A high risk of infection in dogs with T. congolense savannah-type was shown in Sine Saloum, requiring prevention and control of dogs in this area. The involvement of tsetse flies in the transmission of T. congolense in Sine Saloum and Basse Casamance is discussed.
authors.affiliation: Institut de Recherche pour le Developpement, UMR INTERTRYP, Montpellier, France;
authors.forename: Sophie
authors.initials: S
authors.lastname: Ravel
authors.affiliation: Institut de Recherche pour le Developpement, UMR URMITE, Dakar, Senegal;
authors.forename: Oleg
authors.initials: O
authors.lastname: Mediannikov
authors.affiliation: Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement, UMR INTERTRYP, Montpellier, France;
authors.forename: Geraldine
authors.initials: G
authors.lastname: Bossard
authors.affiliation: Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement, UMR INTERTRYP, Montpellier, France.|Faculty of Veterinary Medicine, Bangkok, Thailand.
authors.forename: Marc
authors.initials: M
authors.lastname: Desquesnes
authors.affiliation: Institut de Recherche pour le Developpement, UMR INTERTRYP, Montpellier, France;
authors.forename: Gerard
authors.initials: G
authors.lastname: Cuny
authors.affiliation: Unite de Recherche sur les Maladies Infectieuses et Tropicales Emergentes Aix-Marseille-Universite, Marseille, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Davoust
keywords: Trypanosoma congolense; cattle; dog; donkey; epidemiology