A clinical report on the occurrence of diseases in broiler at Sitakunda, Chattogram in Bangladesh and their link with biosecurity and effect on production

Abstract

A cross-sectional survey was conducted to observe the occurrence of diseases in small scale broiler farms and its link to biosecurity and effect on production at Sitakunda upazila of Chattogram district. . Data are collected from a preformed questionnaire from 23 broiler farms from February 2021 to May 2021. Results show that the most prevalent disease in study area was Newcastle disease (26.09%).None of the flock was raised without antibiotic and combined antibiotic is widely used (47.83%) to treat the infection. Analysis of biosecurity parameter found, 50% of farmers did not know what is biosecurity, 50% of the farmers did not use footbaths, 80% of the farmers did not provide hand washing for doctors or visitors, 100% of the farmers did not provide dedicated clothing to visit the farm, 86% farm had access of rodents, 21% farmers throw the dead bird in open space. Crude mortality rate (CMR) at day one was 38 per 1000 chicks. CMR during the brooding period was 6 per 1000 chicks. CMR after brooding period is 70 per 1000 birds, which is significantly higher than the CMR of brooding period (P=0.004).the number of birds ranged from 500 to 4000, the majority of the farm having 500 to 1000 birds. Almost more than, The results of the study suggest that biosecurity is a major issue in small and medium-scale poultry farming which needs to be addressed prevention of poultry diseases, protecting public health, and ensuring environmental hygiene.