Aurup Ratan Dhar

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Antibiotic usage in commercial chicken production Gazipur, Chattogram, Cumilla, Joypurhat and Bogura ▪ Almost all farms had used antibiotics since the start of their production cycle ▪ Antibiotics were used for both treatment and prophylactic purposes ▪ Antibiotic usage was mainly advised by veterinary practitioners, followed by feed dealers and farmers Chowdhury et~al.

Bangladesh is the 4th largest country in the world with respect to rice area and production [1]. At present, the net cultivable area is about 8.50 M ha and net cultivated area is 7.45 M ha [2]. Rice is the staple food for the people of Bangladesh. It grows in all the three crop growing seasons of the year and occupies about 77% (11.42 M ha) of the total cropped area of about 14.94 M ha. Rice alone constitutes about 93% of the total food grains produced annually in the country [3].