Canadian Poultry Magazine

Infectious bronchitis: Understanding the varying clinical picture

By M.W. Jackwood Poultry Diagnostic and Research Center   

Features Health Diseases Livestock medication Livestock Production Poultry Production Production United States

July 4, 2017, Athens, GA – Avian infectious bronchitis virus (IBV) is a highly contagious coronavirus found in chickens worldwide that costs the U.S. poultry industry millions of dollars annually. Although it’s largely a respiratory disease, some strains of the virus can also cause kidney lesions resulting in nephritis, and in hens, the virus can replicate in the reproductive tract causing egg quality and production losses.

IBV exists in the field as many different types, defined as serotypes or genetic types. In addition, the term “variant” is often used to describe a newly identified but not yet characterized type of the virus.

Currently, the best strategy for managing the disease is the use of modified live IBV vaccines. However, because different serotypes or genetic types of IBV don’t cross-protect, the disease is very difficult to control. Selection of appropriate vaccines requires knowledge about the virus type that’s causing disease in the field. READ MORE


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