"EK" <nobody at elnino.com> wrote in message news:<wpiUb.14$_4.2063 at news.uchicago.edu>... > > If a colony of e. coli grows on manitol salt agar, is this colony > > pathogenic? > > Is this a pathogenic E.coli strain? It is supposed to be a strain obtained from fecal matter, which I would assume is not pathogenic.