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Presence/absence of ESBL- (ESBL- and ESBL-/AmpC-) producing E. coli isolates in 308 samples of clams according to the levels of E. coli (<230 MPN/100 g and ≥ 230 MPN/100 g).
| E. coli MPN/100 g | No. of samples analyzed | No. of positive samples for ESBL-producing E. coli *(%) |
|---|---|---|
| >230 | 28 | 4 (14%) |
| ≤230 | 280 | 6 (2%) |
| Total | 308 | 10 (3%) |
