Our discussion with the FSIS on our Petition for an Interpretive Rule Declaring all enterohemorrhagic Shiga Toxin-producing Serotypes of Escherichia coli (E. coli), Including Non-O157 Serotypes, to be Adulterants Within the Meaning of 21 U.S.C. § 601(m)(1) is ongoing.  Here is the most recent installment: