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Survival on foods and in humans• Acid resistance develops throughout the animalintestinal tract in the rumen, abomasum & intestines• Acid resistant pathogens in faeces may contaminatecarcasses during slaughter• Resistance may persist in adapted cells during coldstorage for periods >70 days• Cells from animals or foods are acid adapted forpersistance in the human stomach
Leyer and Johnson, 1992The influence of acid adaption on survival ofSalmonella in cheese1000% Survival1001010.10.01AdaptedNon-adapted0.0010.00010 20 40 60 80Days
- Page 4 and 5: Bovine GI tractpH (6.0-7.0)pH (2.0-
- Page 7: Pathogen survival in the GI tract
- Page 11 and 12: Survival in the abomasum• Cells e
- Page 13 and 14: Acid adaptation in the live animal
- Page 15: Stresses which occur in foods & in
- Page 19 and 20: Pathogen replication in Acanthamoeb
- Page 21 and 22: Pathogen survival in protozoa• En
- Page 23 and 24: E. coli O157:H7 producing vesicles
Survival on foods and in humans• Acid resistance develops throughout the animalintestinal tract in the rumen, abomasum & intestines• Acid resistant pathogens in faeces may contaminatecarcasses during slaughter• Resistance may persist in adapted cells during coldstorage for periods >70 days• Cells from animals or foods are acid adapted forpersistance in the human stomach
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