Scholarlink

<p>The escalating prevalence of drug-resistant Gram-negative bacteria represents a widespread threat to global public health. This study aimed to investigate the occurrence and genetic determinants of extended-spectrum <i>β</i>-lactamases (ESBLs), carbapenemases, and <i>mcr</i>-encoding genes in GNB isolates from companion animals in the city of Batna, Algeria. In total, 50 faecal samples were collected from various veterinary clinics and pet shops, including direct collection of faecal droppings (<i>n</i> = 22) and rectal swabs (<i>n</i> = 28). After selective isolation, Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry was used to identify representative colonies. Susceptibility testing was carried out using the disk diffusion method. ESBLs, carbapenemases, and colistin resistance determinants were searched for by real-time PCR. Thirty-seven strains were isolated and were mostly identified as <i>Escherichia coli</i> (<i>n</i> = 21). Molecular analysis revealed that 23 isolates carried only the <i>bla</i><sub>ESBL</sub> genes. The genes which were most detected were <i>bla</i><sub>CTX-M-A</sub> (<i>n</i> = 14) and <i>bla</i><sub>CTX-M-A</sub> associated with <i>bla</i><sub>TEM</sub> (<i>n</i> = 8). Two <i>Enterobacter cloacae</i> isolates were positive for the <i>bla</i><sub>OXA-48</sub> gene while one of them additionally carried the <i>bla</i><sub>CTX-M-A</sub> gene. The <i>mcr-</i>1 gene was detected in one <i>Enterobacter kobei</i> isolate. To the best of our knowledge, this is the first report of <i>E. kobei</i> carrying the <i>mcr</i>-1 gene from rectal swabs of cats.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Detection and genetic characterisation of ESBL, carbapenemase, and mcr-1 genes in Gram-negative bacterial isolates from companion animals in Batna, Algeria

  • 期刊论文

  • 发表日期：

    2025年4月19日

查看全文
  • Amira Bouaziz,
  • Esma Bendjama,
  • Widad Chelaghma,
  • Nawel Zaatout,
  • Kaouther Farouk,
  • Fatma Zohra Beghami,
  • Rahma Boukhanoufa,
  • Aroua Demikha,
  • Jean-Marc Rolain,
  • Lotfi Loucif

摘要

The escalating prevalence of drug-resistant Gram-negative bacteria represents a widespread threat to global public health. This study aimed to investigate the occurrence and genetic determinants of extended-spectrum β-lactamases (ESBLs), carbapenemases, and mcr-encoding genes in GNB isolates from companion animals in the city of Batna, Algeria. In total, 50 faecal samples were collected from various veterinary clinics and pet shops, including direct collection of faecal droppings (n = 22) and rectal swabs (n = 28). After selective isolation, Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry was used to identify representative colonies. Susceptibility testing was carried out using the disk diffusion method. ESBLs, carbapenemases, and colistin resistance determinants were searched for by real-time PCR. Thirty-seven strains were isolated and were mostly identified as Escherichia coli (n = 21). Molecular analysis revealed that 23 isolates carried only the blaESBL genes. The genes which were most detected were blaCTX-M-A (n = 14) and blaCTX-M-A associated with blaTEM (n = 8). Two Enterobacter cloacae isolates were positive for the blaOXA-48 gene while one of them additionally carried the blaCTX-M-A gene. The mcr-1 gene was detected in one Enterobacter kobei isolate. To the best of our knowledge, this is the first report of E. kobei carrying the mcr-1 gene from rectal swabs of cats.