Optimum timing for assessing phenotypic resistance against gastrointestinal nematodes in Pelibuey ewes
C. V. Zaragoza-Vera,
R. Gonzalez-Garduño,
G. Arjona-Jimenez
et al.
Abstract:Summary
The objective was to identify the optimal stage of production to evaluate the resistance of Pelibuey ewes against gastrointestinal nematodes (GIN). Faecal egg count (FEC) was used to classify the ewes as resistant, sensible or intermediate against GIN. Forty-seven ewes were mating during 30 d. The gestation was verified by ultrasonography, and the breeding date was used to calculate the productive stages. Faeces were taken weekly to determine the FEC. Blood samples were taken to determin… Show more
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