AI Article Synopsis

  • The study aimed to analyze the presence and persistence of carbapenemase-producing bacteria in wastewater from two hospitals in Mexico, focusing on various bacterial isolates from treated and untreated wastewater.
  • Out of 30 bacterial isolates examined, a high resistance rate (80%) to cephalosporins and carbapenems was found, with resistance genes identified using PCR and a variety of molecular typing methods.
  • The research highlights the importance of monitoring hospital wastewater for antimicrobial resistance, which can serve as an early detection system for potential outbreaks and difficult infections.

Article Abstract

The objective of this study was to investigate the presence and persistence of carbapenemase-producing spp. isolated from wastewater and treated wastewater from two tertiary hospitals in Mexico. We conducted a descriptive cross-sectional study in two hospital wastewater treatment plants, which were sampled in February 2020. We obtained 30 spp. isolates. Bacterial identification was carried out by the Matrix-Assisted Laser Desorption/Ionization-Time of Flight mass spectrometry (MALDI-TOF MS) and antimicrobial susceptibility profiles were performed using the VITEK2 automated system. The presence of carbapenem resistance genes (CRGs) in spp. isolates was confirmed by PCR. Molecular typing was determined by pulsed-field gel electrophoresis (PFGE). High rates of spp. resistance to cephalosporins and carbapenems (80%) were observed in isolates from treated wastewater from both hospitals. The molecular screening by PCR showed the presence of and genes. The PFGE pattern separated the isolates into 19 patterns (A-R) with three subtypes (C1, D1, and I1). Microbiological surveillance and identification of resistance genes of clinically important pathogens in hospital wastewater can be a general screening method for early determination of under-detected antimicrobial resistance profiles in hospitals and early warning of outbreaks and difficult-to-treat infections.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8944648PMC
http://dx.doi.org/10.3390/antibiotics11030288DOI Listing

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