Efficacy of intramuscular doramectin on gastrointestinal nematodes in sheep (Ovis aries)

Abstract

Small ruminants are susceptible to helminth infections, and remain a major constraint on its activity; the main tool for controlling these pathogens is based on the administration of anthelmintic, but there is increasing development of resistance to these drugs, causing difficulty in control. This study evaluated the effectiveness of doramectin administered intramuscularly in sheep, 11 naturally infected sheep was taken and divided into two groups, a control group (CG) without treatment was constituted by 4 animals, and treated group (GT) were constituted for seven animals receiving doramectin 1%. Both groups were sampled by Mc Master technique before treatment (T0) and 6,10,16,24 and 30 days post treatment. Descriptive statistics was performed and efficiency of treatment at different sampling times was calculated. 100% animals were parasitized at T0, and a low percentage of efficacy of treatment was taken during study days and a percentage of overall efficiency of 46.76% product, this indicates resistance doramectin

Keywords

• Rumiantes
• avermectinas
• parasitismo gastroentérico
• tratamiento.