Survival of Escherichia coli O157:H7 and Campylobacter jejuni in Bottled Purified Drinking Water under Different Storage Conditions
| Autor: | Hamzah M. Al-Qadiri, Barbara Rasco, Nivin Al-Alami, Xiaonan Lu |
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| Rok vydání: | 2011 |
| Předmět: |
Time Factors
biology Inoculation Colony Count Microbial Temperature Food preservation Fresh Water Bottled water Escherichia coli O157 biology.organism_classification medicine.disease_cause Microbiology Campylobacter jejuni Enterobacteriaceae Purified water Consumer Product Safety Food Preservation medicine Humans Food science Escherichia coli Bacteria Food Science |
| Zdroj: | Journal of Food Protection. 74:254-260 |
| ISSN: | 0362-028X |
| DOI: | 10.4315/0362-028x.jfp-10-368 |
| Popis: | Survival of Escherichia coli O157:H7 and Campylobacter jejuni that were separately inoculated into bottled purified drinking water was investigated during storage at 22, 4, and -18 °C for 5, 7, and 2 days, respectively. Two inoculation levels were used, 1 and 10 CFU/ml (10(2) and 10(3) CFU/100 ml). In samples inoculated with 10(2) CFU/100 ml, C. jejuni was not detectable (>2-log reduction) after storage under the conditions specified above. E. coli O157:H7 was detected on nonselective and selective media at log reductions of 1.08 to 1.25 after storage at 22 °C, 1.19 to 1.56 after storage at 4 °C, and 1.54 to 1.98 after storage at -18 °C. When the higher inoculation level of 10(3) CFU/100 ml was used, C. jejuni was able to survive at 22 and 4 °C, with 2.25- and 2.17-log reductions, respectively, observed on nonselective media. At these higher inoculation levels, E. coli O157:H7 was detectable at 22, 4, and -18 °C, with log reductions of 0.76, 0.97, and 1.21, respectively, achieved on nonselective media. Additionally, E. coli O157:H7 showed significant differences in culturability (P |
| Databáze: | OpenAIRE |
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