Environmental dispersal of Cryptosporidium parvum oocysts and cross transmission in cultured bivalve molluscs

Two commercially valuable mollusc species ( Ostrea edulisand Tapes decussatus) were experimentally contaminated with Cryptosporidium parvum oocysts. A direct immunofluorescent antibody technique and inclusion/exclusion of the fluorogenic vital dye propidium iodide were used to test for the presence...

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Bibliographic Details
Published in:Parasitology research (1987) 2003-06, Vol.90 (2), p.140-142
Main Authors: GOMEZ-COUSO, H, FREIRE-SANTOS, F, ORTEGA-INARREA, M. R, CASTRO-HERMIDA, J. A, ARES-MAZAS, M. E
Format: Article
Language:English
Subjects:
Animal aquaculture
Animal productions
Animals
Biological and medical sciences
Cryptosporidiosis - transmission
Cryptosporidium parvum - growth & development
Cryptosporidium parvum - isolation & purification
Cryptosporidium parvum - pathogenicity
Culture Media
Environmental Microbiology
Fundamental and applied biological sciences. Psychology
Host-Parasite Interactions
Invertebrate aquaculture
Mollusca
Mollusca - parasitology
Oocysts - isolation & purification
Parasite Egg Count
Water Microbiology
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Summary:Two commercially valuable mollusc species ( Ostrea edulisand Tapes decussatus) were experimentally contaminated with Cryptosporidium parvum oocysts. A direct immunofluorescent antibody technique and inclusion/exclusion of the fluorogenic vital dye propidium iodide were used to test for the presence and viability of the oocysts, showing that transmission of contamination occurred between coexisting species. There was a decrease in the viability of oocysts in the initially uncontaminated molluscs as well as a large decrease in the number of oocysts retained when dead molluscs were used as the source of contamination. The results show the potentially important role that these molluscs play in spreading contamination in depuration plants and areas where aquatic organisms are cultivated.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-002-0748-7