EC markers were identified in 11.3% of isolates by multiplex PCR
(Table 1). ECI (serotype 4b) was the most frequent EC marker
detected (8.5% of isolates) and was observed in both meat products
and food contact surfaces from 3 different processing plants (C, F
and Q). ECIII isolates were also observed (2.8% of isolates), but all of
them were collected from the same meat processing plant (L).