- Cold, Common
- Cold, Viruses
- Colony and Colony Formation
- Colwell, Rita R. (1934- )
- Complement
- Composting, Microbiological Aspects
- Conjugation
- Contamination and Release Prevention Protocol
- Contamination, Bacterial and Viral
- Coryneform Bacteria
- Costerton, John William (1934- )
- Coulter Counter
- Cowpox
- Crick, Francis (1916- )
- Cryoprotection
- Cryptococci and Cryptococcosis
- Cryptosporidium and Cryptosporidiosis
- Culture
- Cytokines
- Cytoplasm, Eukaryotic
- Cytoplasm, Prokaryotic
