BACTERIUM Vibrio cholera.The bacterium Vibrio cholera is usually found in water or in foods that have been contaminated by poop from an INFECTED person.Humans are the only animal affected by cholera.Cholera infection is often mild or WITHOUT symptoms. Malaria is a disease caused by parasites.It is caused by the plasmodium parasite.It is transmitted to people through the bites of infected female Anopheles mosquitoes.Tuberculosis is a bacterial disease.It is caused by Mycobacterium tuberculosis.Tuberculosis most often affects the lungs.Measles is a disease caused by a virus in the paramyxovirus family.It is normally passed through direct CONTACT and through the air.