Infectious Bronchitis Virus (IBV)

Avian infectious bronchitis virus (IBV) is a common, highly contagious type of coronavirus that affects chickens worldwide. Multiple strains of IBV exist which result in mild to severe clinical signs observed in different flocks. IBV targets the chicken's respiratory tract which predisposes young chickens to secondary infection with pathogenic bacteria (such as E. coli), leading to airsacculitis and systemic colibacillosis. Another side effect of IBV infection is that it also enhances the risk of concurrent infection with mycoplasma. IBV is considered to be sensitive to common disinfectants.

IBV is transmitted to chickens through inhalation or direct contact with infected chickens, contaminated equipment, environment, human handlers or fomites.


  • birds