Spore:
Spores are resistant stages of bacteria produced when bacteria are exposed to unfavorable environmental conditions and are highly resistant to heat, desiccation(dehydration),chemicals etc.
| Spore bearing organism | Disease |
| Bacillus anthracis | Anthrax |
| Bacillus subtilis | Food poisoning (rare) |
| Clostridium Tetani | Tetanus |
| Clostridium perfringens | Gas gangrene |
| Clostridium Botulinum | Botulism |