||Insuffisance des indicateurs bactériens dans l'évaluation des taux d'élimination des virus dans les coquillages
||Burkhardt W, Watkins W, Rippey S
||2. Conference Internationale sur la Purification des Coquillages, Rennes (France), 6-8 Apr 1992
||Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1995
||Mollusca, Intestinal microflora, Phages, Seafood, Public health, Diseases, Marine molluscs, Viruses, Shellfish, Self purification, Bacteria, Indicator species
||The reported incidence of shellfish-borne illness in the United States increased dramatically during the last decade. Most of the outbreaks are attributed to diseases of viral aetiology. These human health problems result primarily from the ingestion of raw shellfish which have accumulated enteric pathogens from environmental waters or from wet storage facilities. Our studies have demonstrated that hard-shelled clams concentrate different indicator micro-organisms at variable and unpredictable rates during the year. In temperate waters, this has been observed at two abbreviated periods in mid-spring and again in late fall when accumulation rates increased dramatically. Moreover, these rates were not generally coincident for viruses and bacteria. In addition, our studies have shown that, using conventional depuration technologies, the elimination rates for viruses and bacteria are profoundly different. Relative to vegetative bacterial indicators (fecal coliforms, Echerischia coli), the male-specific coliphage group may take as long as ten times that of the conventional indicator for a similar degree of elimination. Our results, coupled with those of other investigators as well as with certain epidemiological reports, demonstrate that viral behaviour within molluscan shellfish is not indexed by bacterial indicator organisms.