Doramectin resistance in Haemonchus contortus on an alpaca farm in Belgium.

摘要: Parasitism by gastrointestinal nematodes is a health concern in New World Camelids (NWC) worldwide, and anthelmintic treatment often needed for parasite control. Although resistance has been reported ruminants data NWC are only scarce. In the present study, case of suspected doramectin alpacas was examined. A field efficacy study conducted evaluation two different dosages using faecal egg count reduction test. group 8 treated with subcutaneous injection at 0.2mg/kg bodyweight. Individual samples were collected before 7 days after treatment. The counts indicated 68%. To determine whether failure caused true or suboptimal dosage this animal species, 4 subsequently 0.3mg/kg Faecal post reduced 41%, indicating that more likely to be presence resistant parasites on farm. Coprocultures 98.5% Haemonchus contortus small percentage Cooperia oncophora (<1.5%). controlled trial sheep, which optimal known, ensure truly parasites. Infective larvae from faeces these used infect eight nematode-free lambs. These lambs assigned one groups based infection. One injectable bodyweight, other served as non control group. Pharmacokinetics adequate, yet an 16% determined day Identification revealed 100% H. contortus. On treatment, worm 8% results report first time alpacas, mainly