Infectious bronchitis [in poultry] | Zarazni bronchitis živine
2011
Vučićević, M., Fakultet veterinarske medicine, Beograd (Serbia) | Vučićević, I., Fakultet veterinarske medicine, Beograd (Serbia)
Infectious bronchitis is a highly contagious viral respiratory infection of chicken caused by a Coronavirus that is antigenically highly variable. However, the virus also can infect the urogenital and gastrointestinal tracts of chickens. Symptoms include coughing, sneezing and gasping in young birds, loss of appetite, wet litter and a drop in egg production in layers. In chickens under three weeks of age mortality may be up to thirty or forty percent but in birds over five weeks of age the disease does not cause a significant mortality. Four weeks or more may be required before the flock returns to production. Some flocks never regain an economical rate of lay. The quality of eggs is also changed, the eggs are small, soft-shelled and irregular-shaped. The symptoms of infectious bronchitis are non-specific and so laboratory tests are required to confirm diagnosis. There is no specific treatment. Live and inactivated vaccine are available for infectious bronchitis prevention.
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