Hypermucoviscous K pneumoniae Shows Reduced Drug Resistance

TOPLINE:

Hypermucoviscous Klebsiella pneumoniae (hmKp) strains demonstrate a significantly lower prevalence of extended-spectrum beta-lactamase (ESBL) production and slightly lower carbapenem resistance than non-hmKp strains, according to a recent meta-analysis of 2049 clinical isolates.

METHODOLOGY:

• Researchers conducted a meta-analysis to assess the prevalence of ESBL-producing strains and carbapenem-resistant strains among the hmKp and non-hmKp clinical isolates.
• They included 15 studies published between 2014 and 2023, with 2049 clinical isolates of K pneumoniae identified using a string test to distinguish hypermucoviscous from non-hypermucoviscous strains.
• These studies spanned across four continents: Asia, Africa, Europe, and North America.
• The primary outcome was the prevalence of ESBL-producing and carbapenem-resistant strains, determined through antimicrobial susceptibility testing.

TAKEAWAY:

• The hmKp strains were associated with a significantly lower prevalence of ESBL-producing strains than non-hmKp strains (pooled odds ratio [OR], 0.26; P = .003).
• Similarly, hmKp strains were associated with a slightly lower prevalence of carbapenem-resistant strains than non-hmKp strains (pooled OR, 0.63; P = .038).

IN PRACTICE:

“Therapeutic options for CRKP [carbapenem-resistant K pneumoniae] infections are extremely limited due to the scarcity of effective antibacterial drugs. Therefore, it is crucial to consider the risks posed by CRKP strains when administering treatment to patients with hmKp infections and a history of the aforementioned risk factors,” the authors wrote.

SOURCE:

The study was led by Hiroki Namikawa, Department of Medical Education and General Practice, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan. It was published online on December 16, 2024, in Emerging Microbes & Infections.

LIMITATIONS:

Only three databases (PubMed, Scopus, and Cochrane Library) were searched for identifying studies, potentially missing relevant studies from other sources. Furthermore, only articles published in English were included, which may have restricted the scope of analysis. Additionally, geographical distribution was predominantly limited to Asia, limiting the global applicability of the results.

DISCLOSURES:

No funding sources were mentioned, and no conflicts of interest were reported.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.