ArticlePloS one2025
Extended-spectrum β-lactamase-producing Escherichia coli isolated from captive primates: characteristics and horizontal gene transfer ability analysis.
Article in PloS one, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Genomic Analysis of CTX-M-15-Producing E. coli Colonizing a Rescued Capuchin Monkey.EcoHealth · 2026Article
- Captive ungulates as sentinels of antimicrobial resistance: genomic and phenotypic characterization of extended-spectrum β-lactamase-producingFrontiers in veterinary science · 2026Article
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14 authors.
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Abstract
The rapid spread of extended-spectrum β-lactamases (ESBLs)-producing Escherichia coli (ESBL-EC) around the world has become a significant challenge for humans and animals. In this study, we aimed to examine the characteristics and horizontal gene transfer (HGT) capacity of ESBL-EC derived from captive primates. We screened for ESBL-EC among a total of 444 multidrug-resistant (MDR) E. coli strains isolated from 13 zoos in China using double-disk test. ESBL genes, mobile genetic elements (MGEs), and virulence-associated genes (VAGs) in ESBL-EC were detected through polymerase chain reaction (PCR). Furthermore, conjugation experiments were conducted to examine the HGT capacity of ESBL-EC, and the population structure (phylogenetic groups and MLST) was determined. Our results showed that a total of 69 (15.54%, 69/444) ESBL-EC strains were identified, and 5 variants of blaCTX and 3 variants of blaTEM were detected. The highest detection rate was blaCTX-M-55 (49.28%, 34/69), followed by blaCTX-M-15 (39.13%, 27/69). Ten MGEs were detected and the most prevalent was IS26 (78.26%, 54/69), followed by ISEcp1 (60.87%, 42/69). Eighteen combinations of MGEs were detected, in which ISEcp1 + IS26 was predominant (18.84%, n = 13). A total of 15 VAGs were detected and the most prevalent was fimC (84.06%, 58/69), followed by sitA (78.26%, 54/69). Furthermore, HGT ability analysis results showed that 40.58% (28/69) of ESBL-EC strains exhibited the ability to engage in conjugative transfer. Plasmid typing revealed that IncFIB (78.57%, 22/28) had the highest detection rates. Furthermore, antibiotic resistance genes (ARGs) of blaTEM-135, tetA and qnrS; MGEs of IS26, trbC and ISCR3/14 showed high rates of conjugative transfer. The population structure analysis showed that the phylogroup B1 and ST2161 were the most prevalent. ESBL-EC poses a potential threat to captive primates and may spread to other animals, humans, and the environment. It is imperative to implement measures to prevent the transmission of ESBL-EC among captive primates.
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