We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. To learn more, click here. By continuing to use our site, you accept our use of cookies. Cookie Policy.

Features Partner Sites Information LinkXpress
Sign In
Advertise with Us
Abbott Diagnostics- Hematology Division


Develops, manufactures, and markets molecular systems and tests for institutions to perform sophisticated genetic tes... read more Featured Products: More products

Download Mobile App


ATTENTION: Due to the COVID-19 PANDEMIC, many events are being rescheduled for a later date, converted into virtual venues, or altogether cancelled. Please check with the event organizer or website prior to planning for any forthcoming event.
16 Aug 2021 - 26 Aug 2021
Virtual Venue
29 Aug 2021 - 31 Aug 2021
Virtual Venue

Rectal Colonization by Klebsiella Leads to Different Risks for Bacteremia

By LabMedica International staff writers
Posted on 20 Jul 2021
Print article
Image: GeneXpert System Xpert-CARBA test for the detection and differentiation of KPC, NDM, VIM, IMP-1, and OXA-48 in 48 minutes (Photo courtesy of Cepheid)
Image: GeneXpert System Xpert-CARBA test for the detection and differentiation of KPC, NDM, VIM, IMP-1, and OXA-48 in 48 minutes (Photo courtesy of Cepheid)
Carbapenem-resistant Enterobacterales (CRE) represent a threat for public health, being among the top multidrug-resistant pathogens. Intestinal colonization by CRE is a risk factor for developing subsequent infection.

In patients colonized by Klebsiella pneumoniae Carbapenemase (KPC)-producing Klebsiella pneumoniae (KPC-Kp), the rate of bloodstream infections (BSI) ranges from 8% to 23%, and specific factors for development of subsequent BSI have been identified. K.pneumoniae typically colonizes human mucosal surfaces of the oropharynx and gastrointestinal (GI) tract.

Infectious Disease specialists at the Pisan University Hospital (Pisa, Italy) and their colleagues carried out single-center, longitudinal, prospective, observational study involving consecutive adult patients with rectal colonization by CR-Kp admitted to the hospital from December 2018 to December 2019. After initial screening, all hospitalized patients were monitored through periodical rectal swabs on a regular basis (once a week in non-ICU and twice a week in ICU wards).

Rectal swabs were processed using three sequential steps: 1) molecular detection of bla genes involved in carbapenems resistance, 2) culture and pathogen identification, and 3) antibiotic susceptibility testing. Molecular screening was performed by the GeneXpert System Xpert-CARBA test (Cepheid, Sunnyvale, CA, USA). Species identification was performed using MALDI-TOF MS (Bruker Daltonics, Bremen, Germany). Antimicrobial susceptibility tests were performed with the SensiTitre system (Thermo Fisher Scientific, Waltham, MA, USA). Isolates were subjected to whole-genome sequencing (WGS) with an Illumina MiSeq platform (Illumina, San Diego, CA, USA). Rectal carriers were classified as: NDM, KPC, VIM and OXA-48.

The scientists reported that of 677 rectal carriers, 382/677 (56.4%) were colonized by NDM, 247/677 (36.5%) by KPC, 39/677 (5.8%) by VIM and 9/677 (1.3%) by OXA-48. Dissemination of NDM-KP was mostly sustained by ST147, while KPC-kp belonged to ST512. A higher rate of BSI was documented in NDM-compared to KPC-rectal carriers: 59/382, (15.4%) versus 20/247, (8.1%). Incidence rates of BSI/100 patients/month were significantly higher in the NDM (22.33) than in the KPC group (9.56). On multivariate analysis, multi-site extra-intestinal colonization, solid organ transplantation, invasive procedures, intravascular device, ICU, cephalosporin, fluoroquinolones and NDM rectal colonization (odds ratio [OR] = 3.27) were independently associated with BSI.

The authors concluded that their patients colonized by NDM-Kp are at higher risk of bacteremia compared to those colonized by KPC-Kp and the carbapenemase type is strongly related to the specific ST. Thus, the findings may reflect an increased virulence of the ST147 clone of Kp. The study was published on June 27, 2021 in the journal Clinical Microbiology and Infection.

Related Links:
Pisan University Hospital
Bruker Daltonics
Thermo Fisher Scientific

Gold Supplier
Liquid Handling Workstation
Seegene STARlet IVD
SARS-CoV-2 Real Time RT-PCR Kit
MutaPLEX Coronavirus Real Time RT-PCR Kit
Quantitative SARS-CoV-2 Neutralizing Antibody ELISA
KTR-1036 EDI Quantitative SARS-CoV-2 Neutralizing Antibody ELISA
Immunoassay Analyzer

Print article


Molecular Diagnostics

view channel
Image: Primary angle closure glaucoma can cause permanent blindness if not treated quickly. A highly sensitive genetic test has been developed (Photo courtesy of Flinders University)

Highly Sensitive Genetic Test for Glaucoma Developed

In open-angle glaucoma, the angle in the eye where the iris meets the cornea is as wide and open as it should be, but the eye’s drainage canals become clogged over time, causing an increase in internal... Read more


view channel

ELITechGroup Acquires Freezing Point Osmometry Provider GONOTEC

ELITechGroup (Puteaux, France) has acquired GONOTEC (Berlin, Germany), thus uniting two osmometry market leaders. The acquisition will also provides the industry with a full range of osmometry solutions... Read more
Copyright © 2000-2021 Globetech Media. All rights reserved.