Detection of Cryptosporidium Oocysts in Bivalve Molluscs Destined for Human Consumption

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Abstract
Clams (Dosinia exoleta, Ruditapes philippinarum, Venerupis pullastra, Venerupis rhomboideus, Venus verrucosa), mussels (Mytilus galloprovincialis), and oysters (Ostrea edulis) were tested for the presence of Cryptosporidium sp. oocysts using various stain techniques and a commercially available kit containing fluorescein isothiocyanate-conjugated monoclonal antibodies. All molluscs were harvested in northwest Spain (Galicia) except for R. philippinarum, which was from Italy, and 1 of the 6 oyster samples, which was from England. The results showed the presence of Cryptosporidium sp. oocysts in all of the molluscan species destined for human consumption.