Biology, Epidemiology, and Control of Gastrointestinal Nematodes of Small Ruminants

• Published in: The Veterinary clinics of North America. Food animal practice Vol. 36; no. 1; p. 73
• Main Authors: Zajac, Anne M, Garza, Javier
• Format: Journal Article
• Language: English
• Published: United States 01.03.2020
• Subjects: Animals; Anthelmintics - administration & dosage; Gastrointestinal Tract - parasitology; Goat Diseases - drug therapy; Goat Diseases - epidemiology; Goat Diseases - parasitology; Goat Diseases - prevention & control; Goats; Nematoda - isolation & purification; Nematode Infections - drug therapy; Nematode Infections - epidemiology; Nematode Infections - prevention & control; Nematode Infections - veterinary; Sheep; Sheep Diseases - drug therapy; Sheep Diseases - epidemiology; Sheep Diseases - parasitology; Sheep Diseases - prevention & control; Anthelmintics; Nematodes; Haemonchus contortus; Trichostrongyles; Combination treatments
• DOI: 10.1016/j.cvfa.2019.12.005

Strongylid gastrointestinal nematodes are an important cause of disease and economic loss in small ruminants. These parasites are important in most of the United States, with the bloodsucking parasite Haemonchus contortus being the predominant species of concern. Sheep and goats are infected while grazing, and the biology of infective larvae on pastures is important in the design of parasite management programs. Widespread resistance to anthelmintics requires strategies designed to preserve remaining drug activity; these include combination treatments with multiple classes of anthelmintics and targeted treatments.