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Abstract

spp. are important bacteria that colonize the human intestine, especially in preterm infants; they can induce local and systemic disease under specific circumstances, including inflammatory bowel disease, necrotizing enterocolitis and colorectal cancer.

spp. colonized in the intestine of the neonates in the neonatal intensive care unit (NICU) may be associated with disease and antibiotic resistance, which will be hazardous to the children.

Our aim was to know about the prevalence, antimicrobial resistance and genome characteristics of spp. in neonate carriers.

Genome sequencing and analysis, and antimicrobial susceptibility testing were mainly performed in this study.

The isolation rates of spp. strains were 3.7% (16/436) in 2014 and 4.3% (18/420) in 2021. Cases with intestinal-colonized spp. were mainly infants with low birth weights or those with pneumonia or hyperbilirubinemia. According to the core-pan genomic analysis, 34 stains showed gene polymorphism and a sequence type (ST) of an emerging high-risk clone (ST11). Eight strains (23.5%) were found to be resistant to 2 or more antibiotics, and 46 genes/gene families along with nine plasmids were identified that conferred resistance to antibiotics. In particular, the two strains were multidrug-resistant. Strain A1256 that is related to was uncommon, carrying two plasmids similar to IncFII and IncX3 that included five antibiotic resistance genes.

The prevention and control of neonatal spp. colonization in the NICU should be strengthened by paying increased attention to preventing antimicrobial resistance in neonates.

Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 82272352)
    • Principle Award Recipient: JinghuaCui
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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/content/journal/jmm/10.1099/jmm.0.001862
2024-08-16
2025-02-09
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