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Okolo, G.P. , Egena, S.S.A. , Otu, B.O. and Sikiru, A.B. 2023. Expression of major histocompatibility complex class II gene in commercial strains of broiler chickens administered varying levels of aqueous ginger extract . Nigerian Journal of Animal Production. 49, 5 (May 2023), 147–155. DOI:https://doi.org/10.51791/njap.v49i5.3773.