Anthelmintic efficacy of three endectocides administered by oral route in horses

In naturally gastrointestinal nematodes infected horses the anthelmintic ef ficacy of the endectocides invermectin (IVM). doramectin (DRM) and moxidect in (MXD) was evaluated. Animals were evenly distributed to 4 experimental g roups: Group 1. non treated horses. control: Group II treated with an oral dose of 0.2 mg/kg of IVM by oral route: Group III treated with a reformulat ed oral dose of 0.2 mg/kg of DRM: Group IV treated with on oral dose of 0.4 mg/kg of MSD. Faecal samples for parasites eggs count and larval cultures were collected before treatment at 3,6,10,20,40,60,90,105,125,145 and 175 d ays postreatment. Results obtained showed a significant reduction (p <0.05) in the faecal eggs count in treated group. from day 3 to day 145 post trea tment. This level of significant remained until day 175 post treatment only in the group treated with moxidectin.