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Bacteria

Carbapenem-Resistant Klebsiella Pneumoniae: A Growing Public Health Concern

Strategic Insights

— 1 min read

According to a recent study published in BMC Infectious Diseases, carbapenem-resistant Klebsiella pneumoniae (CRKP) poses a significant threat to public health due to its ability to accumulate multidrug-resistance (MDR) and spread silently via gastrointestinal carriage. The study, conducted by researchers at the Pasteur Institute of Iran, aimed to investigate the prevalence and clonal dynamics of CRKP among outpatients.

Key Takeaways:

  • The study found a carriage rate of 13.3% for K. pneumoniae among outpatients, with 45% of isolates considered as CRKP and over 50% exhibiting MDR profiles.
  • The most common carbapenemase genes detected were bla, bla, bla, bla, bla, and bla, with bla being the most prevalent (87.5%).
  • Elevated imipenem minimum inhibitory concentration (MIC) of 128 g/mL was observed, indicating high-level resistance.
  • The study identified the ompK36 group D variants, associated with high-level resistance, as the predominant clone (30%).
  • Multilocus sequence typing (MLST) identified ST231 as the sole lineage among OXA-48 and NDM-1 producers.
  • The research highlighted the need for integrated One Health surveillance, expanded antimicrobial stewardship beyond hospitals, and targeted infection control measures to curb the dissemination of CRKP.

Statistics:

  • 300 stool samples were collected from outpatients without gastrointestinal symptoms from April to September 2023.
  • 40 K. pneumoniae isolates were obtained, with 45% considered as CRKP.
  • 87.5% of isolates exhibited bla carbapenemase gene.
  • 55% of isolates exhibited bla carbapenemase gene.
  • 33.5% of isolates exhibited bla carbapenemase gene.
  • 22.5% of isolates exhibited bla carbapenemase gene.
  • 27.5% of isolates exhibited bla carbapenemase gene.
  • Elevated imipenem MIC of 128 g/mL was observed in 30% of isolates.
  • ST231 was identified as the sole lineage among OXA-48 and NDM-1 producers.

Sources:

  • Clonal dissemination of carbapenem-resistant Klebsiella pneumoniae in outpatients as fecal-carriages: predominance of the high-risk clone ST231. BMC Infectious Diseases, 2025;25(1):1235.

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