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Updated: May 5, 2026

Colonization with Murine pks+ Escherichia coli under Non-Inflammatory Conditions
Published on: March 10, 2026
Extended-spectrum-β-lactamase-producing Escherichia coli as intestinal colonizers in the German community
Giuseppe Valenza1, Silke Nickel, Yvonne Pfeifer
1Bavarian Health and Food Safety Authority, Erlangen, Germany.
Abstract:
We determined the presence of extended-spectrum-β-lactamase (ESBL)-producing Escherichia coli among 3,344 study participants from the German community. Intestinal colonization was detected in 211 persons (6.3%), without significant differences among the different age groups. The majority (95.2%) of isolates harbored CTX-M-type ESBL, with CTX-M-15 (46%) and CTX-M-1 (24.2%) as the most common types. The finding of ESBL producers and one isolate additionally producing carbapenemase OXA-244 indicates a risk of dissemination of resistant bacteria outside the hospitals.
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