Ticks and hemoparasi­toses of livestock in Senegal. III. The north-Sudanian area

Abstract

The authors describe the results of a study on ticks and hemoparasito­ses of cattle and small ruminants in the Senegalese north-sudanian area. For 15 months, 40 bovine, 40 sheep and 40 goals received a routine dipping treatment, aimed at the determination of the tick population dynamics together with an accurate localization of the preferential sites for the different species. The following parasites were collected from the animals : Hyalomma margimitum rulipes, H. truncatum, Rhipicephalus lunulatus, Rh. e. evertsi, Rh. sukatus, Rh. senegalensis, Boophilus decoloratus. Joint studies were  conducted  on the hemoparasites using blood smear and splenectomy. Among bovine, Anaplasma marginale, Ehrlichia bovis, Theileria mutans, Th. teJifera, Trypanosoma congolense, T. brucei and microfilariae from Setaria labiatopapillosa were observed. Babesia bigemimi was observed after a splenectomy. In small ruminants, the detected infections are brought about by A. ovis, Th. ovis and T. vivax.  Hematocrite  value  of apparently healthy animals are studied as well as the  seasonal  variation of this hematological factor.