Delayed anthelmintic treatment in cattle rearing on winter crops: a management of refugia for south Cordoba province, Argentina = Tratamiento antihelmíntico diferido en bovinos recriados sobre verdeos invernales: un manejo del refugio en el sur de Córdoba, Argentina

Abstract

Bovine gastrointestinal helminthic refugia is constituted by eggs and larvae in pastures, so they escape exposure to anthelmintic treatment and constitute a reservoir of susceptibility genes to these drugs. Therefore, if treatment is applied when there is little or no refugia, selection pressure for anthelmintic resistance increases. This study aimed to compare the productive performance of cattle reared on winter crops with and without refugia, applying delayed and pre-entering anthelmintic treatment, respectively.