Infectious bronchitis virus (IBV) induces severe economic losses in chicken farms due to the emergence of new variants leading to vaccine breaks. The studied IBV strains belong to Massachusetts (Mass), Canadian 4/91, and California (Cal) 1737 genotypes that are prevalent globally. This study was designed to compare the impact of these three IBV genotypes on primary and secondary lymphoid organs. ... إقراء المزيد

A total of 40 samples of beef and chicken luncheon (20 samples for each) were collected from different markets in Giza city. Samples were subjected to mycological investigations. Beef luncheon were highly contaminated than chicken luncheon (3.1 x 103 /g ±0.3x 10³) and (4.0 x 102 /g ±0.2x 10² ), respectively. Seven mould genera were isolated from examined samples. The ... إقراء المزيد