Status of anthelmintic resistance in goats maintained under field and farm conditions in chhattisgarh plain

In the present study, field goats in Chattisgarh Plain exhibited 100, 99 and 100% reduction in faecal egg counts with albendazole, levamisole and ivermectin, respectively and lower 95% confidence limit was 98% in all treatment groups. This indicates susceptibility of nematode parasites of field towards all three groups of anthelmintics. On the contrary, farm goats exhibited resistance against benzimidazoles (FECR-94% and lower 95% confidence limit-68%) while levamisole and ivermectin showed 100% efficacy with lower 95% confidence limit of 96 and 99%, respectively. The dominant nematode parasite exhibiting resistance was Haemonchus spp. On egg hatch assay, ED₅₀ value of field goats was 0.0310μg TBZ ml⁻¹ and that of farm was 0.1500μg TBZ ml⁻¹ further confirms emergence of benzimidazole resistance in farm goats.