Biomarker Can Identify Aggressive Form of Bacteria Klebsiella pneumoniae

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https://medicalresearch.com/infections/biomarker-can-identify-aggressive-form-of-bacteria-klebsiella-pneumoniae/43042/

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This blood agar plate (BAP) grew colonies of Gram-negative, small rod-shaped and facultatively anaerobic Klebsiella pneumoniae bacteria- CDC image

This blood agar plate (BAP) grew colonies of Gram-negative, small rod-shaped and facultatively anaerobic Klebsiella pneumoniae bacteria- CDC image

Thomas A Russo, MD, CM
The Departments of Medicine, and Microbiology and Immunology
The Witebsky Center for Microbial Pathogenesis
University at Buffalo-State University of New York, and the
Veterans Administration Western New York Healthcare System
Buffalo, New York

MedicalResearch.com: What is the background for this study? What is Klebsiella pneumoniae?

Response: K. pneumoniae is an important bacterial pathogen that cause a number of different infections. Presently, two pathotypes exist that behave very differently.

Classical K. pneumoniae, which is most common in North America and Europe primarily causes infections in the healthcare setting, usually in patients with co-morbidities. Also, it is becoming increasingly antimicrobial resistant, making treatment challenging.

Hypervirulent K. pneumoniae, which is more common in the Asian Pacific Rim,  can cause infections in otherwise healthy individuals, often causes infection in multiple sites, and these sites are usually not infected by classical K. pneumonia, such as the eye, brain, and aggressive soft-tissue infection (necrotizing fasciitis). Hypervirulent K. pneumonia strains are also becoming antimicrobial resistant, albeit at a slower rate than classical K. pneumoniae at this time.

There are some differences how infections due to these two pathotypes are managed. It would also be ideal to track the prevalence and relative antimicrobial resistance of these two pathotypes, but up until now this could not be reliably done because there was not a validated test that could differentiate them. The goal of this study was to identify biomarkers that could accurately differentiate classical from hypervirulent K. pneumoniae. 

MedicalResearch.com: What are the main findings? 

Response: Several biomarkers were identified and validated that could accurately differentiate classical from hypervirulent K. pneumoniae.  

MedicalResearch.com: What should readers take away from your report?

Response: Findings from our report have laid the groundwork for the development a commercial test that can be used by clinical microbiology labs to optimize patient care.

MedicalResearch.com: What recommendations do you have for future research as a result of this work?

Response: This test can also be used by epidemiologists and researchers so that we can increase our understanding of hypervirulent K. pneumoniae.  Many questions remain unanswered such as what is the best treatment and are certain patients at higher risk for infection, e.g. Asians.

Performance of these additional studies are critical. A pathogen that is capable of causing infection in otherwise healthy individuals and is antimicrobial resistant, making treatment difficult, is highly concerning.

No disclosures or conflicts to report.

Citation:

Identification of biomarkers for the differentiation of hypervirulent Klebsiella pneumoniae from classical K. pneumoniae

Thomas A Russo, Ruth Olson, Chi-Tai Fang, Nicole Stoesser, Mark Miller, Alan Hutson, Jason H. Barker, Ricardo M La Hoz, and James R Johnson

Clin. Microbiol. JCM.00776-18;
Accepted manuscript posted online 20 June 2018, doi:10.1128/JCM.00776-18 

 

 

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