Infectious Bronchitis Virus Genotypes in the Middle East

Area of Science:

• Veterinary Virology
• Molecular Epidemiology
• Poultry Disease

Background:

• Infectious bronchitis virus (IBV) exhibits significant genetic variability due to mutations and recombination.
• Different IBV types, primarily genotype I lineages, are prevalent in Middle Eastern countries.
• Emergence of IBV variants persists in the Middle East despite widespread vaccination programs.

Purpose of the Study:

• To review and discuss the serotypes and genotypes of infectious bronchitis virus (IBV) currently circulating in the Middle East.
• To highlight the ongoing challenge of IBV variant emergence in the region.
• To provide an overview of IBV epidemiology in the Middle East.

Main Methods:

• Phylogenetic analysis of the full-length S1 subunit of the spike gene was used to determine IBV genotypes.
• Review of reported IBV isolates and their genetic relationships.
• Comparative analysis of IBV strains from the Middle East with those detected in Asia and Europe.

Main Results:

• Most IBV types identified in the Middle East belong to different lineages of genotype I.
• IBV isolates from the Middle East share similarities with variants detected in Asia and Europe.
• The genetic diversity of IBV in the region contributes to the challenge of disease control.

Conclusions:

• Understanding IBV serotypes and genotypes is crucial for effective disease management in the Middle East.
• The continuous emergence of IBV variants necessitates ongoing surveillance and vaccine development.
• Genetic similarities between Middle Eastern, Asian, and European IBV strains suggest potential for international spread.