Anthelmintic activity of albendazole in white-tailed deer.

Albendazole at dose rates of 11 to 54 mg/kg (mean of 25 +/- 11 SD) of body weight was highly effective (greater than 99%) against Haemonchus contortus, Ostertagia odocoilei, O mossi, Trichostrongylus askivali and Nematodirus odocoilei in 22 white tailed deer (Odocoileus virginianus) in southern Texas. It was 38% effective against mature and immature deer liver flukes (Fascioloides magna). Toxicoses associated with treatment were not observed. Large numbers of abomasal nematodes (mean of 2,949 +/- 3.147 SD) were recovered from 16 untreated control deer, indicating these may have had a potential impact on herd health and indicating the importance of treatment or other management alternatives.