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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2014 > Volume 13 Number 1 > Chekwube Paul EZE, John Osita Arinze Okoye, Innocent Okonkwo Ogbonna, Wilfred Sunday Ezema, Didacus Chukwuemeka EZE, Emmanuel Chukwudi Okwor, John Okpabi IBU and Elayor Aliyu Salihu

Comparative Study of the Pathology and Pathogenesis of a Local Velogenic Newcastle Disease Virus Infection in Ducks and Chickens

Chekwube Paul EZE, John Osita Arinze Okoye, Innocent Okonkwo Ogbonna, Wilfred Sunday Ezema, Didacus Chukwuemeka EZE, Emmanuel Chukwudi Okwor, John Okpabi IBU and Elayor Aliyu Salihu
Didacus Chukwuemeka EZE , Emmanuel Chukwudi Okwor , John Okpabi IBU and Elayor Aliyu Salihu 1 1 3 3 Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria 1 Microbiology Unit, Department of Biological Sciences, University of Agriculture, Makurdi, Nigeria 2 National Veterinary Research Institute, Vom, Nigeria
Abstract :

The susceptibility to a local velogenic Newcastle disease virus (NDV) strain (Kudu 113) was studied in 6-week-old ducks and chickens. Following intramuscular inoculation, of 106.667/mL ELD, classical signs of ND were observed in infected chicken (IC) on days 3-15 post inoculation (PI). In the infected ducks (ID), only paralysis was observed. Morbidity was 70% in IC and 15% in ID, while the total mortality was 58.3% in IC and 2.94% in ID. Weight loss was highly significant (p<0.05) in IC from day 3 to 21 (PI) but slightly significant (p<0.05) in ID on days 3 and 15 PI. The necropsy showed marked atrophy of the lymphoid organs and hemorrhages on the proventriculus of IC. They also presented severely congested skeletal muscles, sharply demarcated hemorrhagic and necrotic intestinal ulcers and cecal tonsil hemorrhages. The ID showed congested skeletal muscles, mild intestinal erosions and slight cecal tonsil hemorrhages. Sections of the bursa of Fabricius, thymus and spleen showed lymphocytic necrosis and depletion in IC but not in ID. The mild clinical signs and lesions in the ducks reveal that they are far less susceptible than the chickens and may be maintaining the endemicity of ND.


Keywords :
Velogenic newcastle disease, experimental infection, susceptibility, ducks, chickens, Nigeria

Date Deposited : 19 Mar 2015 12:12

Last Modified : 19 Mar 2015 12:12

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

Volume 13, Number 1, - 2014 , ISSN 1682-8356

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