ijvp

Indian Journal of Veterinary Pathology

0250-47580973-970X

Indian Association of Veterinary Pathologists

ijvp-38-3-abs004

ABSTRACTS OF DISSERTATIONS OR ARTICLES

Pathological studies on viral diseases of poultry in Mizoram

Bhutia

Lhaki Doma

¹Singh

Y. Damodar

Dr.¹

¹Degree/Year: M.V.Sc./2014 Name of the University: Central Agricultural University, Imphal, Manipur-795004.

192014

383216216

2014

IndianJournals.com

A study was conducted during the period from March 2013 to February 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. Regular visits were made to different organized and unorganized poultry farms of Mizoram and attended the disease outbreaks. The clinical signs exhibited by the individual bird during illness were recorded and dead or moribund birds were collected for proper necropsy. Representative tissue samples showing typical lesions were collected for histopathology and laboratory detection of the viral antigens.

During the study period, 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, clinical signs/symptoms prior to death, gross lesions observed on postmortem 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.