ASSESSMENT OF EFFICIENCY OF DIFFERENT COMBINED COCCIDIOSTATS AGAINST DIFFERENT EMERIA SPECIES INFECTION IN BROILERS IN BANGLADESH

Abstract

ABSTRACT Coccidiosis is considered as the major parasitic disease of poultry which seriously impairs the growth and productivity. This study was aimed to assess the efficacy of combined coccidiostats in broilers. A total of 1200 broiler chicks (Cobb 500) were reared in different feeding group such as Treatment- 1 (T1), Treatment- 2 (T2), Treatment- 3 (T3), Treatment- 4 (T4), Treatment- 5 (T5) which were treated with anticoccidial combined agents namely without coccidiostat, Maduramicin + Nicarbazin, Narasin + Nicarbazin, Semduramicin + Nicarbazin, Monensin + Nicarbazin respectively. It was found that T3 group consumed lower ration (2.797 kg/bird) followed by T5 group (2.825kg/bird), T2 group (2.835kg/bird), without anticoccidial T1 group (2.880kg/bird) and T4 group (2.888kg/bird) throughout life time. At the culling week, the highest body weight gain (1915g) was recorded in the T5, followed by T3 group (1883g), T4 group (1832g), T2 group (1808g) and T1 group (1805g). The lowest FCR (1.500) was observed in the T5 group, followed by T3 group (1.504), T4 group (1.547), T2 group (1.571), and T1 group (1.576). Highest lesion score recorded in controlled group which was not treated with anticoccidial drugs. On the other hand, lowest lesion score was observed in broilers of T5 followed by T3, T4, T2 and T1. E. tenella showed highest lesion score in broilers in comparison to E. maxima and E. acervulina. Monensin + Nicarbazin combination showed the best efficiency among coccidiostats used in broilers. The findings of the study might be helpful for the prevention and control of coccidiosis in broilers using proper anticoccidial drugs for both prophylaxis and treatment. Keywords: Efficiency, coccidiostats, Eimeria, Lesion score, floor pen, Bangladesh