Caractérisation des Paramètres de Productivité des Poules Locales (Gallus Gallus Domesticus) de Côte D’ivoire Élevées en Conditions Semi Intensives

Abstract

The purpose of this study iswas to evaluate the effects of N. caninum serological prevalence oninfection on the fertility of dairy cows in the area surrounding Dakar, Senegal. This study was conducted from January 2006 to December 2010 and involved 400 dairy cows ( aged 2 to -10 years old.) stabled on these farms. Females identified by ear tagsthe animals were inseminated on natural and / or induced oestrus. Pregnancy status was assessed by rectal palpation 60 days after insemination. A blood sample was collected from each cow and . The sera obtained were analyzed tested for N. caninum antibodies with the multi - species cELISA kit kit(VMRD Inc., Pullman, WA 99163, USA).. On average, The seroprevalence of neosporosis, the pregnancy rate and the calving rates were respectively 23.8%, 43.6% and 95.6% in those herdsrespectively. Pregnancy and calving rates were respectively 33.1% and 92.1% respectively in seropositive cows against compared to 51.7% and 97.3% in seronegative cows (p <0.05). Seropositive cows required more inseminations to get pregnant compared to seronegative cows (3.0 vs 1.9 inseminations /  pregnancy) (p <0.05). A longer calving-fertilizing insemination interval of 22.1 days was observed in seropositive females compared to negative females (p <0.05). In conclusion, So, this protozoan disease has an economic impact due to increased infertility rate it is likely to induce in cattlecows herds.