الفهرس | Only 14 pages are availabe for public view |
Abstract A total of 498 samples (398 eggs and 100 environmental swabs) were collected from two different chick hatcheries in Gharbeia and Dakahlia Governorates. The egg samples included infertile eggs, eggs contain dead embryos at different ages (7, 11, and 14 days) and dead in shell embryos more than 14 days of age. The environmental swabs were taken from hands of workers, egg trays, egg delivery point, walls of hatchery, floors of hatchery, walls of incubators, floors of incubators and refrigerators. These randomly collected samples were subjected to aerobic bacteriological examination in a trial to detect the actual bacterial causes of this problem. The results of bacterial isolation revealed that Proteus species were the most prevalent organisms isolated from dead in shell embryos with high an incidence of (34 .1%) , eggs contain dead embryos with an incidence of (30.8 %), and from infertile eggs with an incidence of (11.9 %). Also the rate of isolation from environmental swabs of different parts of egg hatcheries reached to ( 8.6 %) . The Bacillus species were the most prevalent organisms isolated from dead in shell embryos with high an incidence of (11.4 %), from infertile eggs with an incidence of (3 %) and from both eggs contained dead embryos and environmental swabs with the incidence of (6.4%,5.2 %) respectively . |