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United States Department of Agriculture

Agricultural Research Service

Title: THE EFFECTS OF E-BEAM IRRADIATION ON EASTERN OYSTERS (CRASSOSTREA VIRGINICA) EXPERIMENTALLY INFECTED WITH CRYPTOSPORIDIUM PARVUM)

Author
item Collins, Marina
item Flick, George
item Lindsay, David
item Fayer, Ronald
item Smith, Stephen
item Jahncke, Michael
item Croonenberghs, Robert
item O'keefe, Sean

Submitted to: Institute of Food Technology
Publication Type: Abstract only
Publication Acceptance Date: 8/18/2005
Publication Date: 9/15/2005
Citation: Collins, M., Flick, G., Lindsay, D., Fayer, R. 2005. The Effects of E-Beam Irradiation on Eastern Oysters (Crassostrea virginica) Experimentally Infected with Cryptosporidium parvum [abstract]. Institute of Food Technologists Nonthermal Processing Division Meeting, September 2005, Philadelphia, PA.

Interpretive Summary:

Technical Abstract: Shellfish have been identified as a potential source of Cryptosporidium infection for humans. The inactivation of C. parvum and other pathogens in raw molluscan shellfish would provide increased food safety for normal and at-risk consumers. The present study identified the efficacy an alternative food-processing treatment, e-beam irradiation, on the viability of C. parvum oocyts in Eastern oysters (Crassostrea virginica). Oysters were artificially infected with the Beltsville strain of C. parvum and subjected to e-beam and microwave treatments. The effects of the treatments were evaluated by inoculation of the processed oyster tissues using the neonatal mice assay. Significant reductions (P < 0.05) in infectivity were observed for in-shell and shucked oysters treated with e-beam irradiation doses of 1.0, 1.5 or 2 kGy. A dose of 2 kGy completely terminated C. parvum infectivity and did not adversely affect the visual appearance of the oysters. The FDA approved a petition on the application of irradiation for pathogen control in shellfish during the week of August 14, 2005.

Last Modified: 8/24/2016
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