In vitro characterizations of infectious bronchitis virus (Egypt/Beni-Suef/01 strain) were studied. Heat stability at 56 °C for 5, 10, 15, 20, and 30 min, UV irradiation for 10, 15, 20, and 30 min, chloroform sensitivity, pH stability, and E/M examination were screened. Two-week-old commercial chickens were inoculatedintraocularly with Egypt/Beni-Suef/01. At days 1, 3, 5, 7, 11 and 14 days postinf...