Department of Microbiology, University of Dhaka, Dhaka, Bangladesh.
Department of Microbiology, Jahangirnagar University, Dhaka, Bangladesh.
Vet Med Sci. 2022 Sep;8(5):2032-2039. doi: 10.1002/vms3.874. Epub 2022 Jul 1.
Salmonella is considered one of the leading causes of foodborne illnesses worldwide. Information about the transmission of pathogens to poultry and poultry products is necessary to implement control measures for reducing both human exposure and economic loss. The aim of this study was to analyze and evaluate the transmission characteristics of Salmonella enteritidis to laying-type hen flocks and their laid eggs.
For this purpose, 15 pairs of laying hens were used in which each pair consisted of one inoculated and one contact exposed hen. The eggs and cloacal swabs from these hens were subsequently analyzed.
Of the 15 in-contact hens tested, 60% were found to be positive for S. enteritidis within 61 days postinoculation, of which 26.7% transmission occurred within the first 31 days postinoculation. Among the collected laid eggs tested, S. enteritidis was detected on 58% eggshells and 5.33% eggs internal contents. We also observed a 33.33% reduction in egg production from S. enteritidis-infected hens. In a cross-contamination study, we demonstrated that an experimentally inoculated container can act as a potential source of Salmonella spp.
Our results will help establish effective monitoring programs to reduce the transmission of Salmonella spp. in poultry and poultry products.
沙门氏菌被认为是世界范围内导致食源性疾病的主要病原体之一。了解病原体向家禽及其产品的传播信息对于实施控制措施以减少人类暴露和经济损失是必要的。本研究旨在分析和评估肠炎沙门氏菌向产蛋型母鸡群及其产蛋的传播特性。
为此，使用了 15 对产蛋母鸡，每对由一只接种鸡和一只接触暴露鸡组成。随后对这些母鸡的鸡蛋和泄殖腔拭子进行了分析。
在 15 只接触鸡中，接种后 61 天内有 60%的鸡检测到肠炎沙门氏菌阳性，其中 26.7%的传播发生在接种后 31 天内。在所检测的收集鸡蛋中，58%的蛋壳和 5.33%的蛋内内容物检测到肠炎沙门氏菌。我们还观察到受肠炎沙门氏菌感染的母鸡产蛋量减少了 33.33%。在交叉污染研究中，我们证明了一个实验性接种的容器可以成为肠炎沙门氏菌的潜在来源。
我们的研究结果将有助于建立有效的监测计划，以减少家禽和家禽产品中沙门氏菌的传播。
