Infectious bronchitis (IB) is a highly contagious viral respiratory disease. The importance of IB

infection is its negative effect on the bird’s growth rate and feed efficiency; flocks also have a

high percentage of condemnation at processing.

Table of Contents


Baby chick

• Wheezing, coughing, and sneezing are detectable at night

• Watery eyes, nasal discharge, and swollen sinuses can be seen

• Mortality is usually low but in cases of secondary infections may reach 50%

Growing broiler birds are not generally affected by infectious bronchitis.


There is no known treatment of IBV making prevention highly critical.


• Vaccination is a reliable means of control

• Sanitation and good hygiene

• Where there is an infection, avoid the spread from house to house through equipment, feed, and vehicles.

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