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| Content Provider | PubMed Central |
|---|---|
| Author | Ceuppens, Siele Uyttendaele, Mieke Drieskens, Katrien Marc, Heyndrickx Rajkovic, Andreja Boon, Nico Wiele, Tom Van De |
| Copyright Year | 2012 |
| Abstract | To study the gastrointestinal survival and enterotoxin production of the food-borne pathogen Bacillus cereus, an in vitro simulation experiment was developed to mimic gastrointestinal passage in 5 phases: (i) the mouth, (ii) the stomach, with gradual pH decrease and fractional emptying, (iii) the duodenum, with high concentrations of bile and digestive enzymes, (iv) dialysis to ensure bile reabsorption, and (v) the ileum, with competing human intestinal bacteria. Four different B. cereus strains were cultivated and sporulated in mashed potato medium to obtain an inoculum of 7.0 log spores/ml. The spores showed survival and germination during the in vitro simulation of gastrointestinal passage, but vegetative outgrowth of the spores was suppressed by the intestinal bacteria during the final ileum phase. No bacterial proliferation or enterotoxin production was observed, despite the high inoculum levels. Little strain variability was observed: except for the psychrotrophic food isolate, the spores of all strains survived well throughout the gastrointestinal passage. The in vitro simulation experiments investigated the survival and enterotoxin production of B. cereus in the gastrointestinal lumen. The results obtained support the hypothesis that localized interaction of B. cereus with the host's epithelium is required for diarrheal food poisoning. |
| Related Links | http://dx.doi.org/10.1128/aem.02142-12 |
| Ending Page | 7705 |
| Page Count | 8 |
| Starting Page | 7698 |
| File Format | |
| ISSN | 00992240 |
| e-ISSN | 10985336 |
| Journal | Applied and Environmental Microbiology |
| Issue Number | 21 |
| Volume Number | 78 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2012-11-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Biotechnology Food Science Ecology Applied Microbiology and Biotechnology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Food Science Applied Microbiology and Biotechnology Biotechnology |
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