Prevalence of different diseases and growth performance of broilers vary with environmental variation

Broiler meat is known for its nutritional value, widespread availability, and low price. However, broilers are sensitive to environmental conditions and need a specific environment for optimum production. Global warming and natural disasters are important obstacles to broiler production. Therefore, we conducted this study during analysed the years 2019, 2020, and 2021, to reveal the broiler production status throughout the year in a subtropical region. The study area included Noakhali and Lakshimpur, located in the southern part of Bangladesh. We selected 10 smallholder broiler farms following specific conditions and collected information at the end of each month for analysis. The body weight of broilers was significantly lower in July than in other months. However, the mortality was significantly lower in July than in other months of the year. Nonetheless, the prevalence of viral disease was higher in the winter season (December, January and February). Although, the prevalence of metabolic diseases was higher in October, a high prevalence of bacterial disease was found in April. These results suggest that high temperatures decrease broiler performance while broilers are more susceptible to viral disease in the winter season.