
Bordetelliosis is caused by the bacterium Bordetella avium. The infection is transmitted by contact, bedding, and water. The incubation period is 7–10 days.
According to experts, the incidence of disease in young birds aged 2–6 weeks can reach 80–100%, with a mortality rate of approximately 10%. Within a week, the bird develops a local and systemic immune response: secretory antibodies are produced in the respiratory tract, systemic antibodies are formed in the blood, and cellular defense mechanisms are activated.
The clinical picture of the disease includes:
Diagnosis is based on clinical signs. Laboratory tests are used for confirmation, including the isolation of Bordetella avium from nasal or tracheal swabs, as well as serological tests to assess the epidemiological situation.
Infected flocks are most often treated with oxytetracycline, which can significantly improve the clinical picture within 24 hours, reducing respiratory inflammation and normalizing the birds' condition. The dosage and duration of treatment should comply with veterinary recommendations to minimize the risk of resistance development.
Disease prevention involves several levels. Experts cite disinfection of premises, regular litter changes, and vaccination of birds as key measures. Research shows that vaccinating parent stock effectively reduces the risk of Bordetelliosis in young birds by promoting passive immunity through the eggs .