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Int J Food Microbiol. 2007 Apr 10;115(2):214-9. Epub 2006 Dec 28.

Removal of foot-and-mouth disease virus infectivity in salted natural casings by minor adaptation of standardized industrial procedures.

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Institute for Risk Assessment Sciences, Division Veterinary Public Health, P.O. Box 80.175 NL-3508 TD, University of Utrecht, The Netherlands.


Intestines are used for the production of natural casings as edible sausage containers. Derived from animals (pigs and sheep) experimentally infected with FMDV (initial dosage 10(7.3) PFU/ml, strain O(1Kaufbeuren)), these natural casings were treated with sodium chloride or a phosphate salts/sodium chloride mixture and the residual FMDV titres measured. After storage at about 20 degrees C, no remaining infectivity was found after either treatment, whereas casings stored at 4 degrees C still contained infectivity. Storage of salted casings at about 20 degrees C for 30 days is already part of the Standard Operating Procedures (included in HACCP) of the international casing industry and can therefore be considered as a protective measure for the international trade in natural casings.

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