Department of Veterinary Parasitology CCS Haryana Agricultural University, Hisar - 125 004 (Haryana).
2 Corresponding author.
* Part of M.V.Sc thesis submitted by the first author to CCS Haryana Agricultural University, Hisar.
In spite of prophylactic medication, coccidiosisis still one of the major problems of modem poultry production due to development of drug resistance. In the present study, drug resistance in four field isolates of Eimeria tenella, 3 from Kamal and 1 from Jind district of Haryana was assessed against three commonly used anticoccidial drugs, viz., monensin (100 ppm), salinomycin (60 ppm) and maduramicin (5 ppm). Broiler birds (Ross strain) were infected at the end of 3rd week (day 0) and prophylactic medication commenced on day 2 post infection. The resistance to test anticoccidials was judged by calculating the global index in all the field isolates for each drug individually. Five parameters, viz., weight gain, feed conversion ratio, oocyst index, lesion score and mortality were determined to calculate the global index.
No resistance was observed in any of the field isolates against any of the anticoccidial drugs used. All the drugs showed varying degree of efficacy i.e. maduramicin and monensin showed good efficacy against isolates collected from Kamal district, but against isolate collected from Jind district their efficacy was very good and limited, respectively. On the other hand salinomycin had limited efficacy against most of the isolates collected from Kamal district but against the isolate collected from Jind district its efficacy was very good.
Drug resistance, anticoccidials, ionophores, Eimeria tenella, Haryana
