Avian Pathol.: Cutaneous form of pox infection among captive peafowl (Pavo cristatus) chicks.
Article Type: Brief article
Subject: Peafowl (Health aspects)
Peafowl (Research)
DNA viruses (Health aspects)
DNA viruses (Research)
Virus diseases (Risk factors)
Virus diseases (Research)
Virus diseases (Diagnosis)
Authors: Khan, A.
Yousaf, A.
Khan, M.Z.
Pub Date: 09/01/2009
Publication: Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2009 Association of Avian Veterinarians ISSN: 1082-6742
Issue: Date: Sept, 2009 Source Volume: 23 Source Issue: 3
Topic: Event Code: 310 Science & research
Geographic: Geographic Scope: United States Geographic Code: 1USA United States
Accession Number: 252006991
Full Text: The present study was carried out to investigate the epidemiology and lesions of avian pox in captive peafowl chicks. Overall values of morbidity, mortality, and case fatality were 45.2%, 27.1%, and 60.0%, respectively. The chicks of 9 to 12 weeks of age showed a significantly (P < .001) higher prevalence rate than other age groups. The morbidity and mortality due to avian pox in peafowl chicks was significantly (P < .001) reduced when kept in mosquito-proof cages and hatched under broody chicken hens. Morbidity due to poxvirus infection on the peafowl farm was 82%, 26%, and 12% in successive years. This reduction might have been the result of the introduction of mosquito-proof nets after year 1, although this was not the subject of a controlled experiment. All of the peafowl chicks suffering from dry pox showed pustular and nodular lesions on eyelids, beak, legs, and toes. Distribution of lesions in different body parts varied significantly (P < .023). Lesion diameters were less than 1 cm (59.73%), 1-2 cm (23.75%), and more than 2cm (16.87%). Histopathologic studies revealed extensive proliferation of subdermal connective tissue and infiltration of heterophils and macrophages. The keratinocytes showed degenerative changes in the form of cytoplasmic vacuolation, ballooning, and hyper-chromatic nuclei. Eosinophilic intracytoplasmic inclusions (Bollinger bodies) in keratinocytes were consistently present. It was concluded that avian pox rendered high morbidity, mortality, and case fatality in peafowl chicks.

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