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Airsacculitis induced in broilers with a combination of Mycoplasma gallinarum and respiratory viruses
Avian Diseases
|October 1, 1978
Abstract:
Mycoplasma gallinarum was isolated from tracheas and air-sac lesions from broilers in flocks having higher than normal condemnations due to airsacculitis. A representative M. gallinarum isolant, given by aerosol or by air-sac inoculation, produced air-sac lesions in young chickens when given in combination with a vaccine combining Newcastle disease and infectious bronchitis or with a field strain of infectious bronchitis virus.
Insights
Mycoplasma gallinarum causes airsacculitis in broilers, leading to increased condemnations. This bacterium produced lesions when combined with common poultry vaccines or infectious bronchitis virus.
Area of Science:
- Avian Health
- Poultry Diseases
- Bacteriology
Background:
- Mycoplasma gallinarum is a pathogen associated with respiratory disease in poultry.
- Increased condemnation rates in broiler flocks suggest an underlying disease issue.
Purpose of the Study:
- To investigate the role of Mycoplasma gallinarum in broiler airsacculitis.
- To determine if M. gallinarum can induce airsacculitis, alone or in conjunction with other agents.
Main Methods:
- Isolation and identification of Mycoplasma gallinarum from affected broiler tracheas and air sacs.
- Experimental inoculation of chickens with M. gallinarum via aerosol or air-sac route.
- Co-inoculation with a Newcastle disease and infectious bronchitis vaccine or infectious bronchitis virus field strain.
Main Results:
- Mycoplasma gallinarum was successfully isolated from broiler flocks experiencing high condemnation rates due to airsacculitis.
- Experimental inoculation with M. gallinarum induced air-sac lesions in young chickens.
- Lesion development was observed when M. gallinarum was administered with a combined Newcastle disease/infectious bronchitis vaccine or an infectious bronchitis virus field strain.
Conclusions:
- Mycoplasma gallinarum is implicated as a causative agent of airsacculitis in broilers.
- The pathogenicity of M. gallinarum may be exacerbated by concurrent infections or vaccination challenges.
- Understanding these interactions is crucial for managing respiratory disease complexes in poultry.