described above. Following incubation, the plates were checked for
colony growth. In cases where colonies were indistinguishable,
presumptive colonies were biochemically identified using the
VITEK2 BCL (B. cereus), GN (E. coli O157:H7 and S. Typhimurium),
and GP (S. aureus and L. monocytogenes) cards (bioMérieux, Marcy
l’Etoile, France).