“…Respiratory disease complex has been characterized by weakness, gasping, pump-handled respiration, dyspnoea, nasal discharge, mortality, swelling of sinuses, facial oedema, tracheitis, exudative pneumonia, pleuritis, air sacculitis, pericarditis and sinusitis. In India, a number of bacterial species, such as Avibacterium paragallinarum 1,19,28 , Escherichia coli 13,18 , Pasteurella multocida 2,17 , Ornithobacterium rhinotracheale 13,14 and Mycoplasma synoviae 23 have been isolated and identi ed with varying prevalence in birds suffering from respiratory infection.…”