Abstract
Horses with a history of frequent benzimidazole (BZD) treatment were used in a trial to assess the effectiveness of oxibendazole (OBZ). Initial investigations established that these animals were infected with small strongyles resistant to thiabendazole (TBZ), mebendazole (MBZ), cambendazole (CBZ), oxfendazole (OXF) and fenbendazole (FBZ). The herd was subsequently divided into four groups and received TBZ, CBZ, OBZ, or no treatment. OBZ effectly reduced fecal egg counts. Similar reductions were not observed with TBZ or CBZ.
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