official protocols (APHA, 2001): TVC, Yeasts/Molds, Enterobacteriaceae, Bacillus cereus and Clostridium spp. Anaerobic
conditions were achieved by the use of Anaeropack GENbox Jars combined with Pack-Anaero oxygen absorbers. All plates were examined visually for typical colony types and morphological characteristics associated with each growth medium. In addition, the selectivity of each medium was checked routinely by Gram staining and microscopic examination of smears prepared from randomly selected colonies from all of the media.