How long before resistance makes it impossible to control some field strains of Haemonchus contortus in South Africa with any of the modern anthelmintics?

Veterinary Parasitology - Tập 70 - Trang 111-122 - 1997
J.A. van Wyk1, F.S. Malan2, J.L. Randles3
1Onderstepoort Veterinary Institute, Onderstepoort 0110, South Africa
2Hoechst Research Station, P.O. Box 124, Malelane 1320, South Africa
3Allerton Regional Veterinary Laboratory, Private Bag X2, Cascades 3203, South Africa

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