In pigeon Newcastle disease is caused by pigeon paramyxovirus type-1
(PPMV-1) which is a variant of avian paramyxovirus-1 (APMV-1) and
characterized on the basis of monoclonal antibody-binding profiles.
PPMV-1 in pigeons produces digestive and nervous disturbance and
mortality and morbidity reaches up to 40 and 70 %, respectively.
Submucosal to echymotic haemorrhages in proventriculus and intestine,
tracheaitis, nephritis and encephalitis were observed in pigeons died
PPMV-1 infection. The second most important disease found in pigeons, is
coccidiosis which is well known among pigeon farmers with the common
name of "KHUNI PACHISH". Coccidiosis causes severe blood mixed diarrhea
and enteritis . In coccidial infection, the immune system of bird
becomes depressed and are more susceptible to bacterial and viral
infections.