Vibrio cholerae

Gram-negative and slightly curved rods that causes cholera, a severe case of diarrhea transmitted through feces. 
This disease was a pandemic in the 19th century due to poor sanitation, and is still endemic in some areas, such as parts of Asia and India (Ganges river) because it likes the soil and water that is salty and alkaline. Even though it has no spores, it can survive almost indefinitely in favorable conditions.
It is occasionally seen as an epidemic due to spreading through people traveling on airplanes.
== Infection ==
The diarrhea is a result from the cholera toxin (type of enterotoxin) usually contains a high mucous content and makes the body release fluids. They have "rice-water stools", the resemblance caused by the mucous.
50% mortality rate without treatment due to fluid and electrolyte loss. 
== Treatment ==
Fluid and electrolyte replacement, followed by a tetracycline, most likely doxycycline.