micro_of_eggs

micro_of_eggs - Microflora of Eggs Microbiology of Eggs...

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Harrison – FDST 4030/6030 Microbiology of Eggs 1 Harrison FDST 8090 Microbiology of Eggs Microbiology of Eggs Harrison FDST 8090 Microflora of Eggs ± Primary sources ± Intestinal tract of bird, nest, dust, feed, shipping and storage containers, humans, etc. ± Numbers on shells varies - ± 10 2 -10 7 /shell ± Depends on source and handling ± Normally more Gr + than Gr - on shell ± Micrococci, Pseudomonas, Moraxella, etc. Harrison FDST 8090 Shell Eggs ± Contents are highly perishable ± Intact, dry shelled eggs may have shelf life of months (even at room temperature) ± Most in commerce contain no bacteria within the shell Harrison FDST 8090 Eggs: Factors Affecting Microbial Growth ± Shell ± Mechanical barrier ± Albumen components ± Lysozyme - lysis cell walls of Gr + ± Conalbumin - chelates iron, copper ± pH - increases from 7.7 to ~9.4 ± CO 2 that is present is lost; pH increases ± Conalbumin activity is greater at higher pH ± Others - 8-10 other factors Harrison FDST 8090
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This note was uploaded on 04/08/2011 for the course FDST 4080 taught by Professor Pegg during the Winter '10 term at UGA.

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micro_of_eggs - Microflora of Eggs Microbiology of Eggs...

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