IMPACT DES TIQUES SUR DES BOVINS METISSES DANS LE NORD DE LA COTE D’IVOIRE

Abstract

Bred mixed animals (Ndama x Abondance (Ndamance), Ndamance x Montbeliard, Ndamance x Holstein) following in traditional and modern herds, allowed us to know the ticks genus and species and their seasonal variation in savannah region of North Cote d’Ivoire. Amblyomma variegatum level of infestation was higher in such breed than local one (up to 1200 adults ticks per animal) and Dermatophilosis impact was important (up to 90% for untreated animals) with lesions, sometimes, extended to all the body. Slight wound was seen in predilections areas of Amblyomma adults localized in udder or scrotum regions. Others adverse effects were observed as anemia and weight loss. The PVC value was frequently observed before animal’s death. At clinical level, Heartwater was identified only once. The prevalence of Theileria sp, Babesia bovis and B. bigemina was observed from blood smears were 5%, 0.1% and 0.05% respectively. The rate of follow up treatment rate was not adapted to seasonal variation of ticks, including Amblyomma variegatum. Key Words: Ticks, Seasonal variation, Mixed breed cattle, North Côte d’Ivoire