Chekwube Paul EZE
Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
John Osita Arinze Okoye
Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
Innocent Okonkwo Ogbonna
Microbiology Unit, Department of Biological Sciences, University of Agriculture, Makurdi, Nigeria
Wilfred Sunday Ezema
Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
Didacus Chukwuemeka EZE
Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
Emmanuel Chukwudi Okwor
Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
John Okpabi IBU
National Veterinary Research Institute, Vom, Nigeria
Elayor Aliyu Salihu
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.
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How to cite this article
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, 2014. Comparative Study of the Pathology and Pathogenesis of a Local Velogenic Newcastle Disease Virus Infection in Ducks and Chickens. International Journal of Poultry Science, 13: 52-61.
DOI: 10.3923/ijps.2014.52.61
URL: https://scialert.net/abstract/?doi=ijps.2014.52.61
DOI: 10.3923/ijps.2014.52.61
URL: https://scialert.net/abstract/?doi=ijps.2014.52.61
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