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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2007 > Volume 6 Number 5 > Kamaldeep1, P.C. Sharma2, N. Jindal2 and G. Narang2

Occurrence of Marek’s Disease in Vaccinated Poultry Flocks of Haryana (India)

Kamaldeep1, P.C. Sharma2, N. Jindal2 and G. Narang2
1Department of Veterinary Microbiology 2Department of Veterinary Epidemiology and Preventive Medicine, College of Veterinary Sciences, CCS Haryana Agricultural University, Hisar-125 004, India
Abstract :

Marek’s Disease (MD), which is a lymphoproliferative disease of chickens, remains one of the most important diseases. In the present study, occurrence of Marek’s disease virus in ten vaccinated poultry
flocks of Haryana (India) from different geographical locations was determined on the basis of clinical signs, gross and histopathology and precipitation test. The vaccines used were either HVT alone or in combination with SB-1. Samples from all the flocks had gross and histopathological lesions suggestive of Marek’s disease. Grossly, visceral tumors in liver, spleen, kidney and ovary were observed. The characteristic histopathological lesions included infiltration of pleomorphic lymphoid cells such as lymphoblasts, small and large lymphocytes, plasma cells and occasionally MD cells in different organs. The lesions were noncapsulated and infiltrative type. In immunodiffusion test, feather follicle tip samples from five flocks gave a positive precipitation reaction.

Keywords :
Marek’s disease, vaccinated poultry, diagnosis

Date Deposited : 14 Jul 2011 13:53

Last Modified : 14 Jul 2011 13:53

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 6, Number 5, - 2007 , ISSN 1682-8356

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