ABSTRACT
As discussed above, shellfish harvested in waters contaminated with raw or inadequately treated sewage are extremely efficient transvectors of seafood pathogens because the shell fish filter the water as they feed, concentrating the pathogens (1,2,29,59). Paradoxically refrigeration increases the pathogens’ geographic range, permitting transport of apparently healthy shellfish to many geographic areas, thus extending and prolonging outbreaks. Inad equate procedures for tracing and recall of contaminated seafood also serve to extend outbreaks (17,18,27).
