Newcastle disease was experimentally produced using virulent Newcastle disease virus strain of chicken origin by three routes (Group – I orally, Group – II intranasally and Group – III intramuscularly) in domestic pigeon. Incontact transmission was also attempted. In Group I, Group III and incontact squabs, clinical signs recorded were paralysis of the legs, wings, closure of the eyelids followed by whitish diarrhoea whereas no signs were seen in Group II squabs. All the birds were necropsied. Histopathological examination of the cerebrum revealed vascular congestion with perivascular cuffing and gliosis. The HA and HI titre of group –I and group– II squabs were found to be in between 1:16 – 1:32 and in group II were 1:128 – 1:2 respectively. The antibody titre in incontact squabs was in between 1:8 – 1:32.
Source : IPSACON-2005
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