Table 1.
Qualitative analysis of Escherichia coli OUT (OgGp9):H18 contamination in milk carton served at school lunch
| Milk served date | Milk produced date | Served school a of the positive and negative milk cartons for E. coli OUT (OgGp9):H18 (number of cartons) | E. coli OUT (OgGp9):H18 positive rate (%) | |
|---|---|---|---|---|
| Positive | Negative | |||
| 14 June | 11 June | No samples | D (1), E (1), F(1), J (1), K (1), L (1), B or C (2), G or H or I (3) | 0/11 (0) |
| 15 June | 14 June | A (1), D (1), E (1), J (1), K (1), O (1) | F (1), B or C (2), G or H or I (3) | 6/12 (50) |
| 16 June | 15 June | A (1), D (1), E (1), F (1), J (1), K (1), B or C (1), G or H or I (3) | B or C (1) | 10/11 (90.9) |
| 17 June | 16 June | M (1), M or N (1) | A (1), M (4), M or N (1) | 2/8 (25) |
a
A total of 15 schools (A-O).