Titel (eng)

Genetic Characterization of Carbapenem-Resistant Klebsiella spp. from Municipal and Slaughterhouse Wastewater

Autor*in

Mykhailo Savin   University Hospital Bonn / University of Bonn

Jens Andre Hammerl   German Federal Institute for Risk Assessment

Annemarie Käsbohrer   University of Veterinary Medicine Vienna / German Federal Institute for Risk Assessment

Silvia Schmoger   German Federal Institute for Risk Assessment

Isidro García-Meniño   German Federal Institute for Risk Assessment / Universidade de Santiago de Compostela

Judith Kreyenschmidt   University of Bonn / Hochschule Geisenheim University

Ricarda Maria Schmithausen   University of Duisburg-Essen

Gabriele Bierbaum   University of Bonn

Nico T. Mutters   University Hospital Bonn

Verlag

MDPI

Beschreibung (eng)

Currently, human and veterinary medicine are threatened worldwide by an increasing resistance to carbapenems, particularly present in opportunistic Enterobacterales pathogens (e.g., Klebsiella spp.). However, there is a lack of comprehensive and comparable data on their occurrence in wastewater, as well as on the phenotypic and genotypic characteristics for various countries including Germany. Thus, this study aims to characterize carbapenem-resistant Klebsiella spp. isolated from municipal wastewater treatment plants (mWWTPs) and their receiving water bodies, as well as from wastewater and process waters from poultry and pig slaughterhouses. After isolation using selective media and determination of carbapenem (i.e., ertapenem) resistance using broth microdilution to apply epidemiological breakpoints, the selected isolates (n = 30) were subjected to WGS. The vast majority of the isolates (80.0%) originated from the mWWTPs and their receiving water bodies. In addition to ertapenem, Klebsiella spp. isolates exhibited resistance to meropenem (40.0%) and imipenem (16.7%), as well as to piperacillin-tazobactam (50.0%) and ceftolozan-tazobactam (50.0%). A high diversity of antibiotic-resistance genes (n = 68), in particular those encoding β-lactamases, was revealed. However, with the exception of blaGES-5-like, no acquired carbapenemase-resistance genes were detected. Virulence factors such as siderophores (e.g., enterobactin) and fimbriae type 1 were present in almost all isolates. A wide genetic diversity was indicated by assigning 66.7% of the isolates to 12 different sequence types (STs), including clinically relevant ones (e.g., ST16, ST252, ST219, ST268, ST307, ST789, ST873, and ST2459). Our study provides information on the occurrence of carbapenem-resistant, ESBL-producing Klebsiella spp., which is of clinical importance in wastewater and surface water in Germany. These findings indicate their possible dissemination in the environment and the potential risk of colonization and/or infection of humans, livestock and wildlife associated with exposure to contaminated water sources.

Sprache des Objekts

Englisch

Datum

2022

Rechte

Dieses Werk bzw. dieser Inhalt steht unter einer
CC BY 4.0 - Creative Commons Namensnennung 4.0 International Lizenz.

CC BY 4.0 International

http://creativecommons.org/licenses/by/4.0/

Klassifikation

Spectrum-Beta-Lactamase; Retail Chicken Meat; Escherichia-Coli; Pneumoniae; Enterobacteriaceae; Reservoir; Bacteria

Mitglied in der/den Collection(s) (1)