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Volume 31, Number 3—March 2025
Dispatch

Extended-Spectrum β-Lactamase–Producing Enterobacterales in Municipal Wastewater Collections, Switzerland, 2019–2023

Lisandra Aguilar-Bultet1, Elena Gómez-Sanz1, Ana B. García-Martín, Monica Alt Hug, Reto Furger, Lucas Eichenberger, Claudia Bagutti2, and Sarah Tschudin-Sutter2Comments to Author 
Author affiliation: University Hospital Basel, Basel, Switzerland (L. Aguilar-Bultet, E. Gómez-Sanz, Ana B. García-Martín, S. Tschudin-Sutter); State Laboratory Basel-City, Basel (M.A. Hug, R. Furger, L. Eichenberger, C. Bagutti)

Main Article

Table 1

Quantification over 3 years of presumptive extended-spectrum β-lactamase–producing Enterobacterales in municipal wastewater collections, Switzerland, 2019–2023*

Colony 2019, n = 63
 2021, n = 62
 2023, n = 63
Median CFU/mL (IQR) Range, CFU/mL Median CFU/mL (IQR) Range, CFU/mL Median CFU/mL (IQR) Range, CFU/mL
ESBL Escherichia coli 60 (8−180) 0–15,480 193 (50−520) 0−18,100 195 (58−708) 0−125,300
ESBL KESC 10 (0−83) 0−9,700 178 (51−731) 0−11,400 110 (13−373) 0−5,550
ESBL E. coli + KESC 120 (28−283) 0−15,480 473 (191−1,403) 0−11,400 475 (80−1,585) 0−125,300

*Comparisons for 2019 versus 2021 versus 2023 by Friedman test. All colony p values were statistically significant at <0.001. ESBL, extended-spectrum β-lactamase; IQR, interquartile range; KESC, Klebsiella, Enterobacter, Serratia, and Citrobacter group.

Main Article

1These first authors contributed equally to this article.

2These senior authors contributed equally to this article.

Page created: February 04, 2025
Page updated: February 21, 2025
Page reviewed: February 21, 2025
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