The capability for ingesting and spreading the fixed oocysts of Cryptosporidium and fixed cysts of Giardia, two waterborne protozoan parasites, by Artemia franciscana, a microcrustacean widely used as live diet in fish and shellfish larviculture, was demonstrated using differential interference contrast and immunofluorescence microscopy. Our findings suggest the possibility that this microcrustacean could serve as a disseminating vehicle of both parasites in aquatic environments.
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