| Slide agglutination test | No. of suspected E. coli | Type of sample | |||
| Serotype | % | ve+ | % | No. | |
| - | 0.0 | 0.0 | 1.61 | 1 | Ras cheese |
| O25 | 25.0 | 1.0 | 20 | 14 | Processed cheese |