Seasonal Prevalence of Myiasis Causing Fly (Oestrus ovis) Diptera Oestridae in Goats in Kaduna State Nigeria.

OWOLABI, Y.H., GEORGE, B.D.J.,AND NATALA,A.J.

Nig. J. Ent. 31: 109-115 (2015)

ABSTRACT. The survey was carried out for two consecutive dry and wet seasons to determine seasonality of Oestrus ovis (Diptera: Oestridae) infestation in goats in five Local Govemment Areas (LGAs) of Kaduna State, Nigeria. A total of 893 goat heads were bought from slaughter houses and market places. The heads were hand sawn vertically through the nasal cavity; forceps and pen knife were used to expose the nasal cavities, and turbinate bones and frontal sinuses. The larvae collected were preserved in 10% formalin and kept in appropriately labelled sample
bottles. The average prevalence of O. ovis in goats was 18.7%; the distribution of prevalence by LGAs was 22.9%, 19.8%, 14.1%, 17.0% and 18.8% for Sabon Gari, Zaria, Kudan and Makarfi LGAs, respectively. The seasonal prevalence showed a bi-modal peak during the two year periods, each occurring between June and July of each year. There was a significant difference (P<0.05)
in the prevalence during the dry season of November to April(14.7%) and wet season of May to October (22.7%).
Keywords: Goats, Oestrus ovis, Prevalence, Seasonal variation.

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