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- Brucellae - the bacterium that causes the disease called brucellosis or "undulant fever"
- Syphilis - an age-old sexually transmitted disease, which can also be transmitted through heavy kissing, an infected area on the lips, and through transfusions
- Tularemia - a widespread zoonotic disease (of lower animals that can be transmitted to humans), being indigenous to many species of animals and insects
- Whooping Cough - a disease transmitted in airborne droplets expelled from an infected person's respiratory tract
