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[a study to assess the microbial contamination of mya arenaria clams from the north shore of the st lawrence river estuary, (québec, canada)].the aims of the present study were to assess the microbial quality of mya arenaria clams from the north shore of the st. lawrence river estuary and to validate various microbial indicator microorganisms of bivalve mollusks contamination. clams were collected from nine sites, including four harvesting sites closed by virtue of the canadian shellfish sanitation program (cssp). six contamination indicators (fecal coliforms, somatic coliphages, f-specific coliphages, fecal streptococci, clostridium ...200617110967
cryptosporidium parvum oocysts in zebra mussels (dreissena polymorpha): evidence from the st lawrence river.molluscan shellfish can recover and concentrate environmentally derived waterborne pathogens and can be used for the sanitary assessment of water quality. oocysts of cryptosporidium parvum (genotype 1) were identified in zebra mussels (dreissena polymorpha) from the st. lawrence river, quebec. approximately 67 oocysts/ml of hemolymph and 129 oocysts/g of soft tissue were recovered. the adjusted concentration of oocysts per gram of tissue was 2.2 x 10(2), and approximately 4.4 x 10(2) oocysts wer ...200111293571
natural transmission of cryptosporidium parvum between dams and calves on a dairy farm.the transmission of cryptosporidium parvum between dams and their respective calves was studied. for this purpose, fecal specimens taken from the rectum of preparturient, parturient, and postparturient dams were analyzed for c. parvum oocysts. fecal specimens were taken from the newborn calf 4 hr after birth. because the environment can be a source of contamination to the animals, specimens taken from inside and outside the barn were analyzed. the sucrose concentration method together with the z ...200010864245
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