Abstract

Coccidiosis is a critical parasitic disease that affects poultry through severe impairment in growth and yield. The present study aimed to evaluate the efficacy of combined coccidiostats in broiler chickens reared in floor pen systems. A total of 1200 Cobb500 broiler chickens were divided into five treatment groups, each group consisting of eight replications, which were based on different coccidiostats, including Treatment 1 (Control), Treatment 2 (Maduramicin-Nicarbazin), Treatment 3 (Narasin-Nicarbazin), Treatment 4 (Semduramicin-Nicarbazin), and Treatment 5 (Monensin-Nicarbazin). Performance parameters were recorded on days 7, 14, 21, 28, and 33. Treatment 3 exhibited the lowest feed consumption per chicken (2.797 kg), followed by Treatment 5 (2.825 kg) and Treatment 2 (2.835 kg). The control group consumed the highest amount of feed (2.880 kg), followed by Treatment 4 (2.888 kg). During week five, Treatment 5 demonstrated the highest body weight gain (1915 g), whereas Treatment 2 showed the lowest (1808 g). The lowest feed conversion ratio (FCR) was observed in Treatment 5 (1.500), followed by Treatment 3 (1.504), Treatment 4 (1.547), Treatment 2 (1.571), and the control group (1.576). However, the maximum intestinal lesion scores were noted in the control group, compared to the experimental groups observed on the culling day. Treatment 5 indicated the lowest lesion scores, followed by treatments 3, 4, and 2. Among the observed species, Eimeria (E.) tenella exhibited the highest lesion scores compared to E. maxima and E. acervulina in all the groups. Therefore, the effective use of these coccidiostats is crucial for preventing and managing coccidiosis outbreaks in poultry.