Infectious Bronchitis is not the same disease as Newcastle. There are two forms of Newcastle, one extremely virulent and fatal, called END.
Exotic Newcastle disease (END) is a contagious and
fatal viral disease affecting all species of birds. END
is so virulent that many birds die without having
developed any clinical signs. END can infect and
cause death even in vaccinated poultry. Mortality is
up to 90 percent of exposed birds.
Clinical Signs
END affects the respiratory, nervous, and
digestive systems. The incubation period for the
disease ranges from 2 to 15 days. An infected bird
may exhibit the following signs:
Respiratory: sneezing, gasping for air, nasal
discharge, coughing
Digestive: greenish, watery diarrhea
Nervous: depression, muscular tremors,
drooping wings, twisting of head and neck,
circling, complete paralysis
Reduction in or complete loss of egg production
Swelling of the tissues around the eyes and in
the neck
Sudden death