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VetMed Resource

Veterinary information to support practice, based on evidence and continuing education

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60 randomly selected farms in Aguascalientes that kept Holstein cows in free-pen housing systems were visited once a month from May to July 1997. On each farm, 10 milk-producing cows were selected at random and flies were collected from the dorsum, flank and front of the legs for identification. ...

Cruz-Vázquez, C.; Vitela-Mendoza, I.; Ramos-Parra, M.; Quintero-Martínez, M. T.; García-Vázquez, Z.
Veterinaria México, 1999, 30, 2, pp 205-208