TAMU FSTC 326 - november 26 notes (2 pages)

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november 26 notes



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november 26 notes

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Pages:
2
School:
Texas A&M University
Course:
Fstc 326 - Food Bacteriology

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THERMALLY TREATED PRODUCT o Hot smoking May be salted cured 3 6 NaCl Heated smoked at 50 80 C coo without significant muscle breakdown color change Aerobic or vaccuum storage o Sous vide low temp under vaccuum Cooked in pouches at low temps for extended period Problematic for clostridium spore survival ad post process botulism Must destroy cross contaminating vegetative pathogens following with refrigerated storage prior to heating for serving Liquid smoke for flavor Not high enough content to inhibit microbiological growth o Food borne listeriosis o Canned products salmon tuna microbiologically stable if canned properly but may still have off odors due to incipient spoilage of amines FERMENTED PICKLED PRODUCTS o Pickle organic acids acetate citrate lactate salt spices Spoilage by fermentative gram positives LAB o Pastes proteolysis of fish meat to soften paste texture Salted halophiles may spoil of salt tolerant Gram positives Fermentative gram negatives listeria etc dont grow in high salt content SHELLFISH MUSSELS o Oysters mussels other shellfish Oysters may spoil by fermentation and or proteolysis during storage o Filter feeders concentrate icrobes in GI tube Pathogenic enteric bacteria Vibrio spp Testing for vibria and other indicators of safety for harvest State lab at A M Galveston FOOD SAFETY CHALLENGES o VIBRIO SPP Shellfish finfish Smoked products cold smoked incompletely cooked o Enteric pathogens fresh marine water contaminated with fecal run off sludge Vacuum packed product fresh or par cooked o C botulinium type E psychotrophic cold smoked product or sous vide cooked with vacuum storage o L monocytogenes further processed product not coked lightly salted o Viral pathogens noroviruses o Parasitic agents Anisakis simplex ANISAKIS SIMPLEX o Under cooked fresh finfish meat bearing larvae o Marine species primary transmission vehicles o Symptoms Vomiting diarrhea Nausea Abdominal pain bloody stool Ciguatera toxin poisoning o Dinoflagellate organism non



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