FDST 100 Lecture Notes - Lecture 8: Listeria Monocytogenes, Food Microbiology, Cestoda
9 Feb 2017
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Document Summary
The study of living organisms that are too small to be visible with the naked eye. Can be harmful (pathogenic) to humans: foodborne illness. Can be detrimental to quality: spoilage. Can be beneficial: culture and fermented products. Vibrio (comma: active, vegetative cells, dormant, spores, gram + or gram . Bacteria: 1/40 milionth of an inch. 1 micron: not seen by the naked eye. Molds > yeasts > bacteria: viruses can be even smaller than bacteria. Bacteria: prefer neutral to slightly alkaline, h growth range is 4-11, alkaline foods. Water activity (aw )- indicates the available water in food. Mold facultatively aerobic vs facultatively anaerobic: require o2. Will utilize organic or inorganic substrates: simple to complex (examples) Undesirable foodborne illness (pathogens) food infections food intoxication aka food poisoning) food spoilage impact on flavor, texture, appearance, and odor: economic loss food waste.
