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Table 1 Characteristics of the ESBL-producing Escherichia coli clusters isolated from wastewater specimen

From: Quantitative evaluation of extended-spectrum β-lactamase-producing Escherichia coli strains in the wastewater of a French teaching hospital and relation to patient strain

Cluster Range of enumeration in wastewater (UFC/L) a β-lactamases DiversiLab® pattern Pulsotype
WWCG1a 2 × 104 – 4 × 104 a CTX-M-14, TEM-1 1 1a
WWCG1b 2.5 × 104 – 2.5 × 105 a CTX-M-27 1 1b
WWCG2 1 × 104 - 1 × 106 a CTX-M-1 2 -
WWCG3 2 × 104 TEM-3 3 -
WWCG4 1 × 104 TEM-3 4 -
WWCG5 2 × 104 CTX-M-1, TEM-1 5 -
  1. aConcentration estimated for both the dilution-filtration method and the concentration method