Hananeh Wael M, Al-Natour Mohammad Q, Alaboudi Akram R, Abo-Shehada Mahmoud N, Bani Ismail Zuhair A
Department of Veterinary Pathology & Public Health, Faculty of Veterinary Medicine, Jordan University of Science and Technology (JUST), P.O. Box 3030 Irbid 22110 Jordan.
Department of Basic Veterinary Medical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology (JUST), P.O. Box 3030 Irbid 22110 Jordan.
Heliyon. 2021 Feb 14;7(2):e06272. doi: 10.1016/j.heliyon.2021.e06272. eCollection 2021 Feb.
Determination of the chick embryonic developmental period at which embryonic mortalities occur could help in establishing the cause of such mortalities. The late stage of embryonic development has particular importance due to its dramatic effect on life after hatching. This study was conducted to investigate the occurrence, frequency and bacterial isolates from dead-in-shell chick embryos in Northern Jordan. A total of 1,000 unhatched eggs were collected at hatching day from 10 hatcheries located in Northern Jordan. Out of 1,000 eggs, 357 (35.7%) were fertile, of which 210 (58.8%) were dead-in-shell embryos. Approximately 50.5% of the dead embryos displayed abnormalities, including neck muscles with subcutaneous petechial haemorrhages (44.3%), beak abnormalities (3.8%), eye deformities (1.9%) and anencephaly (0.5%). Sixty-six bacterial isolates were identified from 82 samples from the dead-in-shell embryos. The isolates were 22 (33.3%) , 18 (27.3%) , 14 (21.2%) , 5 (7.6%) , 4 (6.1%) , 2 (3%) and 1 (1.5%) . Mixed growth was also recorded in 16 (19.5%) samples. There was a significant (P < 0.05) association between as a bacterial isolate and the occurrence of neck and beak abnormalities. In this study, infection of check embryos with several bacterial species, particularly , was identified as an important cause of multiple congenital abnormalities involving the neck and beak of unhatched chicks.
确定鸡胚胎发生死亡的发育时期有助于查明此类死亡的原因。胚胎发育后期因其对孵化后生命的巨大影响而尤为重要。本研究旨在调查约旦北部死在壳内的鸡胚胎的发生情况、频率及细菌分离株。在孵化日从约旦北部的10个孵化场收集了总共1000枚未孵化的蛋。在1000枚蛋中，357枚（35.7%）受精，其中210枚（58.8%）为死在壳内的胚胎。约50.
