Pathological studies on viral diseases of poultry in Mizoram, India

L D BHUTIA; Y D SINGH

Volume : VI, Issue : IX, September - 2016

Pathological studies on viral diseases of poultry in Mizoram, India

L D Bhutia, Y D Singh

Abstract :

A study was conducted during the period from March 2013 to Feuary 2014 to survey the prevalence of viral diseases of poultry in Mizoram, to study the pathology and finally to diagnose them by using common laboratory techniques. A total of 476 dead and sick birds were collected from different organized and unorganized poultry farms of Mizoram. Of these, 208 cases (i.e. 43.69%) were diagnosed as viral diseases. The diseases were diagnosed based on clinical history, signs and symptoms prior to death, gross lesions observed on post–mortem examination, histopathology and laboratory detection of viral antigens. Among the diseases, infectious bursal disease (IBD) was found in 15.13% followed by Newcastle disease (ND) in 8.40%, Marek’s disease (MD) in 7.14%, lymphoid leukosis (LL) in 5.88%, hydropericardium hepatitis syndrome (HHS) in 5.04% and infectious laryngotracheitis (ILT) in 2.10% cases, respectively. Age–wise analysis showed that the maximum number of cases were recorded in the age group of 3–6 weeks (40.38%), followed by 6–9 weeks (28.84%), above 12 weeks (17.30%), 1–3 and 9–12 weeks (6.73%) age groups of poultry. The season–wise incidence of viral diseases was found to be the highest during winter season, followed by summer and rainy seasons. The present study suggests that many viral diseases are prevalent in poultry population of Mizoram which occur mostly in winter season with higher incidence in 3–6 weeks age groups.