- T Cells or T-Lymphocytes
- Taq Enzyme
- Tatum, Edward Lawrie (1909-1975)
- Tetanus and Tetanus Immunization
- Theiler, Max (1899-1972)
- Thermal Death
- Thrush
- Tobacco Mosaic Virus (TMV)
- Toxic Shock Syndrome
- Toxoplasmosis
- Transcription
- Transduction
- Transformation
- Transgenics
- Translation
- Transmission of Pathogens
- Transplantation Genetics and Immunology
- Transposition
- Tuberculosis
- Tularemia
- Tumor Viruses
- Typhoid Fever
- Typhus
