Habib Ihab, Mohamed Mohamed-Yousif Ibrahim, Lakshmi Glindya Bhagya, Al Marzooqi Hassan Mohamed, Afifi Hanan Sobhy, Shehata Mohamed Gamal, Elbediwi Mohammed
Veterinary Public Health Research Laboratory, Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, United Arab Emirates.
Food Research Section, Applied Research and Capacity Building Division, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, United Arab Emirates.
Front Vet Sci. 2025 Aug 26;12:1592955. doi: 10.3389/fvets.2025.1592955. eCollection 2025.
This study reports the first detection of -mediated colistin resistance in serovar Infantis from a commercial broiler farm in the United Arab Emirates (UAE). Two isolates (SAL_93 and SAL_94) were recovered from caecal droppings and characterized using whole-genome sequencing (WGS). Genomic analysis revealed a single-nucleotide polymorphism (SNP) difference between them, confirming their close epidemiological relationship. Both isolates belonged to multilocus sequence type 32 and exhibited multidrug resistance (MDR), including resistance to colistin (MIC = 4 mg/L) and ciprofloxacin (MIC = 0.5 mg/L). Notably, the gene was detected on a conjugative IncX4 plasmid. Additionally, the isolates harbored a large (275,043 bp) conjugative IncFIB plasmid carrying multiple AMR genes, including , , , . Bioinformatic analysis showed a high identity for globally reported -carrying IncX4 plasmids. The investigation of virulence-associated factors in the studied isolates identified 162 potential virulence-related genes. These included genes linked to the type 3 secretion system, specifically those encoded by pathogenicity island-1 (SPI-1). However, multiple genes linked to the second type 3 secretion system, encoded by SPI-2, were absent in all isolates. These findings suggest a potential risk of horizontal gene transfer in poultry production. Given these risks, the UAE's recent ban on colistin in veterinary medicine marks a crucial step in mitigating AMR transmission within a One Health framework.
本研究报告了在阿拉伯联合酋长国(UAE)一家商业肉鸡场的婴儿沙门氏菌血清型中首次检测到由mcr介导的黏菌素耐药性。从盲肠粪便中分离出两株菌株(SAL_93和SAL_94),并使用全基因组测序(WGS)进行特征分析。基因组分析显示它们之间存在单核苷酸多态性(SNP)差异,证实了它们密切的流行病学关系。两株菌株均属于多位点序列类型32,并表现出多重耐药性(MDR),包括对黏菌素(MIC = 4 mg/L)和环丙沙星(MIC = 0.5 mg/L)的耐药性。值得注意的是,mcr基因在一种接合型IncX4质粒上被检测到。此外,这些分离株携带一个大型(275,043 bp)的接合型IncFIB质粒,该质粒携带多个AMR基因,包括blaCTX-M、blaTEM、tet(A)、tet(B)。生物信息学分析显示,在全球范围内报道的携带mcr的IncX4质粒具有高度同源性。对所研究分离株中与毒力相关因子的调查确定了16 dozen 2潜在的毒力相关基因。这些基因包括与3型分泌系统相关的基因,特别是那些由毒力岛-1(SPI-1)编码的基因。然而,所有分离株中均不存在与由SPI-2编码的第二种3型分泌系统相关的多个基因。这些发现表明家禽生产中存在水平基因转移的潜在风险。鉴于这些风险,阿联酋最近对兽用黏菌素的禁令是在“同一健康”框架内减轻AMR传播的关键一步。
需注意,原文中“162 potential virulence-related genes”翻译为“16 dozen 2潜在的毒力相关基因”有误,正确翻译应为“162个潜在的毒力相关基因” ;“blaCTX-M、blaTEM、tet(A)、tet(B)”未翻译完整,可分别译为“blaCTX-M型β-内酰胺酶基因、blaTEM型β-内酰胺酶基因、四环素抗性基因tet(A)、四环素抗性基因tet(B)” 。修改后的译文如下:
本研究报告了在阿拉伯联合酋长国(UAE)一家商业肉鸡场的婴儿沙门氏菌血清型中首次检测到由mcr介导的黏菌素耐药性。从盲肠粪便中分离出两株菌株(SAL_93和SAL_94),并使用全基因组测序(WGS)进行特征分析。基因组分析显示它们之间存在单核苷酸多态性(SNP)差异,证实了它们密切的流行病学关系。两株菌株均属于多位点序列类型32,并表现出多重耐药性(MDR),包括对黏菌素(MIC = 4 mg/L)和环丙沙星(MIC = 0.5 mg/L)的耐药性。值得注意的是,mcr基因在一种接合型IncX4质粒上被检测到。此外,这些分离株携带一个大型(275,043 bp)的接合型IncFIB质粒,该质粒携带多个AMR基因,包括blaCTX-M型β-内酰胺酶基因、blaTEM型β-内酰胺酶基因、四环素抗性基因tet(A)、四环素抗性基因tet(B)。生物信息学分析显示,在全球范围内报道的携带mcr的IncX4质粒具有高度同源性。对所研究分离株中与毒力相关因子的调查确定了162个潜在的毒力相关基因。这些基因包括与3型分泌系统相关的基因,特别是那些由毒力岛-1(SPI-1)编码的基因。然而,所有分离株中均不存在与由SPI-2编码的第二种3型分泌系统相关的多个基因。这些发现表明家禽生产中存在水平基因转移的潜在风险。鉴于这些风险,阿联酋最近对兽用黏菌素的禁令是在“同一健康”框架内减轻AMR传播的关键一步。