In light of a severe epidemic spread, increasing viral load, and the isolation of different strains of the Infectious Bronchitis Virus (IBV) that clearly cause devastating economic losses—whether through broiler mortality rates ranging from 10–40% or a drop in egg production (both table eggs and hatching eggs) of up to 40%.

With the diversity of isolates and their symptoms, such as the classical GI-1 strains and their respiratory manifestations;

The 793B isolates belonging to the GI-13 lineage, which are associated with kidney symptoms; and the Var II strains belonging to the GI-23 lineage, the most widespread in Egypt, which affect immunity and kidneys;

As well as the QX strain belonging to the GI-19 lineage, which causes multiple losses in egg production;

Taking into account that different serotypes of the IB virus do not provide strong cross-protection against one another, controlling Infectious Bronchitis infections depends on three main pillars:

1. First: Strict biosecurity during production cycles and thorough cleaning and disinfection between cycles, in order to reduce viral load and minimize the chances of infection.
2. Second: Good management and maintaining the health of the respiratory and digestive systems of birds to enhance the body’s natural resistance to infection. For example, increased ammonia levels in poultry houses or mycoplasma infections greatly facilitate IB virus infection because they damage the natural immunity of the respiratory system.
3. Third: Proper vaccination using multiple live and inactivated (killed) vaccines to provide broad immune coverage and protection against the largest possible number of IB virus types, ensuring that the number of inactivated vaccine doses in breeders and layers is not less than two.

We pray that God protects us from infections and losses.