Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
The agent that causes this disease can be transported in the Cary-Blair medium, and it is often diagnosed by plating it onto TCBS medium and looking for yellow colonies. Its namesake enterotoxin ADP-ribosylates a G-protein linked to adenylate cyclase, causing a massive increase in cAMP concentration and opening of chloride channels. Epidemiologist John Snow traced the origin of one outbreak in Westminster, and its causative agent was isolated by Filippo Pacini. Cystic fibrosis is thought to confer a heterozygote advantage against, FTP, this disease, caused by a gram negative vibrio bacterium, which leads to massive dehydration and diarrhea and is transmitted through contaminated water.
A:
Science