Avian Mycoplasmosis - Causes, Symptoms, and Control Measures
Avian Mycoplasmosis, caused by Mycoplasma gallisepticum, manifests as Chronic Respiratory Disease in chickens and Infectious Sinusitis in turkeys. Learn about transmission, symptoms, histopathology, diagnosis, and control strategies.
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poultry diseases 2 fourth stage second semester lecture 1 part 1 Avian Mycoplasmosis Dr.Harith Abdulla Department of Pathology and Poultry Disease College of Veterinary Medicine University of Basrah University of Basrah- College of veterinary medicine- Department of Pathology and Poultry Disease
Mycoplasma gallisepticum causes : A -Chronic Respiratory Disease (CRD):In chickens. B Infectious Sinusitis: In Turkeys. causes : Definition: An infectious and contagious disease characterized by respiratory signs: Rales, coughing, sneezing ,gasping and nasal discharge. Definition:
1-Bacterial infections: Escherichia coli ,Hemophilus paragallinarium 2-Viral infection. 3-Vaccination : Newcastle Disease, Infectious Bronchitis. 4- Stress. 5- Gases: NH3 6- Dust. 7- Irregular temperature.
1-The disease transmitted through eggs(Vertical transmission). 2-Spread by air-born dust or droplets and contact. 3- Carriers. Symptoms: 1-Nasal discharge. 2-Foamy exudates in eyes and sinuses. 3-Tracheal rales. 4-Gasping. 5-Sneezing. Symptoms:
1-Catarrhal exudates in respiratory tract. 2-Caseous exudates in the air sacs. 3-Airsacs may have beaded appearance. 4-Fibrinous perihepatitis and fibrinous pericarditis. Histopathology: 1-Thickening of mucous membrane. 2-Mononuclear cell infiltration in the mucous membrane of respiratory tract . Histopathology:
1-Signs. 2- Lesions. 3-Serology ( Agglutination ). 4- Isolation of the organism.
1- Eradication is the best method of controlling mycoplasmosis. 2-Start with mycoplasma free chicks. 3-Do not use mycoplasma recovered birds for breeding. 4-Delay vaccination when birds are under stress. 5-Proper ventilation. 6-Vaccination. 7- Egg treatment (heating, dipping with antibiotics, spraying) .
1- Tetracycline. 2- Tylosin is the drug of choice.
Causes: Airsacculitis in Turkey Poults(Immature Turkey). Causes:
Definition: Infectious Synovitis :Is a disease of chickens and turkeys characterized by joint infections and respiratory disease . The causative agent is Mycoplasma synoviae . Definition:
Epizootiology As in Mycoplasma gallisepticum. Epizootiology:
1-Pale comb. 2-Lameness and distended joints of legs and wings especially hock joint and foot pads. 3-Breast blisters. 4- Greenish diarrhea. 5-Respiratory distress. 6- High morbidity but low mortality.
1-Exudate in the joint at first is mucoid and later becomes creamy and then caseous and yellowish. 2-The liver is enlarged and greenish , and the kidney swollen. 3-Air sacs may be filled with caseous exudates. Diagnosis: 1- History. 2- Signs. 3-Lesions. 4- Serology. 5- Isolation and identification of the organism. Diagnosis:
