在Salmonella Typhimurium中以集成子为媒介的抗菌耐药性和病毒性因素从家禽中分离出来
Elizabeth Kim1, Nora Jean Nealon1,2, Katherine A Murray1,3
1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Animals : an open access journal from MDPI
|December 17, 2024
概括
禽类沙门氏菌Typhimurium的I类整合子显著增加对关键抗生素的耐药性. 对这些整体子的查可以改善抗菌素耐药性的监测和家禽生产的管理.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 兽医科学 兽医科学 兽医科学
背景情况:
- 食品生产动物的抗菌素耐药性 (AMR) 是一个日益严重的公共卫生问题.
- 沙门氏菌 (Salmonella Typhimurium) 是家禽中的重要病原体,通常与AMR有关.
- 一类整合子是已知携带抗微生物耐药性基因的移动遗传元素.
研究的目的:
- 调查I类整合子在来自美国家禽的Salmonella Typhimurium分离物的抗菌耐药性和毒性中的作用.
- 在整体阳性和整体阴性分离物中确定AMR的遗传基础.
主要方法:
- 26种来自美国家禽的沙门氏菌Typhimurium分离物的全基因组测序.
- 对抗药物耐药性基因概况,毒性因子和分离物之间的整合子存在的比较分析.
- 统计分析以确定观察到的差异的意义.
主要成果:
- 在26个分离物中,有3个含有I类整体子 (每个含有1000bp).
- 整体阳性分离体对β-乳酸盐,醇和四环素的耐药性显著增加 (p < 0.05).
- 整合子阳性分离物中含有特定的AMR基因 (例如,ges,imp,oxa,catB,tetA) 和细菌素基因,而无整合子分离物中含有更多的手指骨和脚骨基因.
结论:
- 一类整合子与抗菌素耐药性增加和沙门氏菌Typhimurium中更广泛的耐药性基因阵列有关.
- 整体查可以增强抗菌耐药性监测,并为家禽的抗菌管理提供信息.
- 研究结果支持减少家禽高优先级抗微生物药物使用的战略,可能降低对人类和动物健康的风险.
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