-transparent.png){kind=logo}
Multiple resistance to albendazole, thiophanate, levamisole and orally administered invermectin was detected in an isolate of Haemonchus contortus in sheep on a farm where benzimidazole resistance had already been identified. Following a faecal egg count reduction test, this was confirmed by both critical and controlled anthelmintic tests. Different groups of sheep infected naturally or given an experimental infection with the benzimidazole-resistant isolate were treated with the recommended doses of various anthelmintics. Compared to the control group, the percentage reductions in the faecal egg counts of sheep treated with albendazole, thiophanate, levamisole and ivermectin varied between 38.2% and 79.1% and the residual worm counts between 27.3% and 57.5%. The results indicate the presence of multiple anthelmintic resistance in this isolate of H. contortus. Sheep treated with closantel showed 100% reductions in faecal egg and worm counts, indicating that this drug was very effective against the population of H. contortus on the farm.
R M Waruiru, and
J W Ngotho, and
J G Mukiri
December 1995,
Veterinary parasitology,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
May 1994,
Veterinary parasitology,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
December 2013,
The Veterinary record,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
January 1992,
Veterinary research communications,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
October 1994,
Veterinary parasitology,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
January 2016,
Advances in parasitology,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
June 1990,
The Veterinary record,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
April 2015,
Veterinary parasitology,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
January 1990,
Australian veterinary journal,
R M Waruiru, and
J W Ngotho, and
J G Mukiri
February 2003,
Tropical animal health and production,
