coliforms are
considered a natural occurrence on produce and their importance
as faecal indicators is limited as some species may be of non-fecal
origin. Doyle and Erickson (2006) concluded that E. coli was a
better indicator of fecal contamination than coliforms but more
recent genetic information, collected by Luo et al. (2011) may have
weaken that conclusion. Moreover, E. coli was not detected, even