author(s)
Shanmugasundaram Udhayavel, Tippichettypalayam Ramasamy Gopala Krishna Murthy, Vasudevan Gowthaman and Kandasamy Senthilvel

abstract
Mycoplasma gallisepticum (MG) is one of the causative organisms of chronic respiratory disease in poultry. It causes poor weight gain, increase FCR and high mortality in broiler chicken which result in heavy economic loss in broiler industry. In the present research the seroprevalence of Mycoplasma gallisepticum (MG) in broiler chickens in the area of Tamil Nadu, India was studied. From 9 broiler farms, 141 sera samples were collected and subjected to indirect ELISA. The overall prevalence of MG was 16.31% in broiler chicken. Among the positive samples, 8 samples (18.18%) from the age of 4 weeks, 3 samples (5.66%) from the age of 5 weeks and 12 samples (27.27%) from the age of 6 weeks were detected respectively. The prevalence of M. gallisepticum infection in broiler chicken was documented in this study. So, to control MG infection strict bio security measure has to be followed in the poultry farms.