GROWTH AND SURVIVAL OF LISTERIA MONOCYTOGENES DURING MANUFACTURE AND STORAGE OF DAMIETTA CHEESE

Document Type : Research article

Authors

Abstract

Damietta cheese was prepared from pasteurized milks containing 5 or 10% added sod. chloride. Pasteurized milk' was inoculated
isolate-serotype 1), before with L.monocytogenes strain V7 (milk addition of salt and rennet. Cheese samples were stored in their
for L.monocytogenes and examined periodically 30°C
increase in the numbers of L.monocytogenes during the manufact ure of both types of cheeses. L.monocytogenes could survive until the end of the third week of storage, and reached a minim um of / 100 cells/g. which could not be recovered on the plates. There was a decrease in pH value and moisture content of chees es, while the salt contents (water phase) increased gradually during the storage p < /strong>eriod. The p < /strong>ublic health hazards, and the suggestive measures were mentioned.