Robert Koch
He discovered the tubercle bacillus that caused tuberculosis and the cholera bacillus, Vibrio cholerae, among other things. For his many scientific achievements in 1905 he received the Nobel Prize for Physiology or Medicine. See link for more detail.
John Snow discovered cholera in 1852, from contaminated water.
Cholera did not exist in the U.S. or Europe in 1800. It appeared in the 1830's. Once it arrived, the only method of prevention was sanitation and keeping drinking water free of contamination by the cholera bacillus
G.A. Hansenin discovered the bacillus that causes leprosy.
Robert Koch, a pioneering microbiologist in the late twentieth century, isolated and identified the pathogenic bacteria that caused cholera (Vibrio cholera), anthrax (Bacillus anthracis) and tuberculosis (Mycobacterium tuberculosis).
Cal·mette Albert Léon Charles (1863-1933),French bacteriologist, and Gué·rin Camille(1872-1961), French veterinarian
Bacillus cereus is a Gram positive, soil dwelling ,beta hemolytic , endemic bacterium. It causes food borne diseases.It is a facultative anaerobe and like other members of the genus Bacillus,, produces endospores.
Vibrio cholera, the bacterium that causes the disease "cholera" is not a Coccus, Bacillus, or Spirillum. being of the genus Vibrio, it is a Gram-negative curved/straight rod, motile by means of monotrichous flagellation (a single polar flagellum) for a more complete description of the Vibrio genus, see Dr. Kenneth Todar, PhD's page on http://www.textbookofbacteriology.net/cholera.html It should explain many of the traits common to genus Vibrio.
The bacterium was discovered in 1882 by Edwin Klebs.
Robert Koch discovered the causative agents of several diseases including the bacteria responsible for anthrax (Bacillus anthracis), tuberculosis (Mycobacterium tuberculosis), and cholera (Vibrio cholerae). His work in identifying these microorganisms helped establish the field of medical microbiology.
Dr. Robert Koch discovered the tuberculosis bacillus
Louis Pastaur discovered the vaccine for anthrax and chicken cholera