| Acanthamoeba (guidance only) |
| Adenoviruses |
| Aeromonas hydrophila |
| Caliciviruses |
| Coxsackieviruses |
| Cyanobacteria |
| Echoviruses |
| Helicobacter pylori |
| Microsporidia |
| Mycobacterium avium intracellulare |
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