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
Description:
A Thesis
Submitted to the Department of Microbiology and Parasitology
Sher-e-Bangla Agricultural University, Dhaka
In Partial Fulfillment of the Requirements
for the degree of
MASTER OF SCIENCE (M.S.) IN PARASITOLOGY
SEMESTER: July-Dec/2021
