Be there is different germs
A bacterium called Vibrio cholerae causes cholera infection. The deadly effects of the disease are the result of a toxin the bacteria produces in the small intestine. The toxin causes the body to secrete enormous amounts of water, leading to diarrhea and a rapid loss of fluids and salts (electrolytes).
Traits that have 3 or more phenotypes may be the result of MULTIPLE alleles, I believe. Hope that helps!
