| Gram-negative | |
| Bacteria | Toxins |
| Klebsiella | - Enterotoxins |
| - Shiga toxin | |
| Escherichia coli | - Shiga toxin |
| - Endotoxins | |
| Pantoea agglomerans | - Adhesins |
| - Enterotoxins | |
| - Shiga toxin | |
| Pseudomona auruginosa | - Exotoxin A |
| - Exotoxin S | |