Survival of <i><scp>E</scp>scherichia coli</i> <scp>O</scp>157:<scp>H</scp>7 during the Manufacture and Storage of Fruit Yogurt
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Bibliographic record
Abstract
Abstract The objectives of the study were to assess the behavior of E scherichia coli O 157: H 7 during the manufacture of fruit yogurt at different fermentation and storage temperatures. Reconstituted milk was fermented at 37, 40 or 45C; the resultant product was stored at 4, 10 or 15C for 7 days. Samples of milk and yogurt were analyzed. E . coli O 157: H 7 and lactic acid bacteria ( LAB ) counts; pH of samples was recorded. During fermentation, E . coli O 157: H 7 grew in the presence or absence of LAB regardless of temperature. E . coli O 157: H 7 increased in presence of thermophilic LAB more than 2.75 log cfu/ mL . The growth of LAB in all samples showed the same trend. The pH values of milk containing E . coli O 157: H 7 and LAB decreased gradually to reach 4.6 ± 0.1 at the end of fermentation period. During cooling, there was neither growth nor death of E . coli O 157: H 7 at 4 and 10C, while a slight increase at 15C. All the experiments showed significant differences in the population of E . coli O 157: H 7 in the presence or absence of LAB . During storage, E . coli O 157: H 7 number declined for all experiments and approached undetectable levels at the end of storage. The sensitivity of E . coli O 157: H 7 to acidity and lowered temperature was noticed during storage. Practical Applications E scherichia coli O 157: H 7 has emerged as a major foodborne pathogen and has been implicated in several outbreaks involving milk and dairy products. The results of the present study indicate that E . coli cannot tolerate the acidity and storage temperature. Applying quality control systems in the processing line will ensure that the E .coli will not survive in the commercially prepared fruit yogurt.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it