254
Appendices – Round Table Summaries
to bracket the relationship between the amount consumed and how likely you
are to become ill.
When asked whether the risk assessment for norovirus takes into account variability in virulence levels among the different genogroups and strains of norovirus,
the consensus was that there was currently no plan to address that. Both genogroups
will be treated the same way and from a model perspective, both genogroups will
be treated as equally infectious.
A point was made that E. coli or fecal coliforms are indicators but are not good for
enteric viruses followed by the questions, will bacterial indicators be eliminated in
the future? Are there acceptable levels established for noroviruses in shellfish? From
a European perspective, on a sample-to-sample basis, E. coli or fecal coliforms may
not be good predictors of NoV but on a time series bacterial data set basis gives a
good relationship between noroviruses and E. coli. It seems unimaginable that any
norovirus standard would ever replace the E. coli requirements in the EU. In North
America, regulators classify growing areas based on sanitary surveys, identification
of pollution sources, and mitigation strategies, as needed. Fecal coliforms are
important in sanitary surveys.
Appendices – Round Table Summaries
to bracket the relationship between the amount consumed and how likely you
are to become ill.
When asked whether the risk assessment for norovirus takes into account variability in virulence levels among the different genogroups and strains of norovirus,
the consensus was that there was currently no plan to address that. Both genogroups
will be treated the same way and from a model perspective, both genogroups will
be treated as equally infectious.
A point was made that E. coli or fecal coliforms are indicators but are not good for
enteric viruses followed by the questions, will bacterial indicators be eliminated in
the future? Are there acceptable levels established for noroviruses in shellfish? From
a European perspective, on a sample-to-sample basis, E. coli or fecal coliforms may
not be good predictors of NoV but on a time series bacterial data set basis gives a
good relationship between noroviruses and E. coli. It seems unimaginable that any
norovirus standard would ever replace the E. coli requirements in the EU. In North
America, regulators classify growing areas based on sanitary surveys, identification
of pollution sources, and mitigation strategies, as needed. Fecal coliforms are
important in sanitary surveys.