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Modes of transmission of bacterial infections
| Mode of transmission | Disease examples |
|---|---|
| Contact | Streptococcal impetigo (skin-to-skin), gonorrhea (mucus membrane-to-mucus membrane), Salmonella (fecal–oral), syphilis (transfusion) |
| Airborne | Tuberculosis, Q fever, legionella |
| Droplet | Pertussis, meningococcus, Haemophilus influenzae |
| Vectors | Lyme disease (tick), Shigella (fly) epidemic typhus (lice), bubonic plague (fleas) |
| Vehicular | Campylobacter (food), trachoma (fomites) |
