Cholera is an acute gastrointestinal infection caused by cholera bacteria. The patient has typical symptoms including abdominal pain, vomiting and massive diarrhea leading to severe dehydration and exhaustion. Cholera bacteria, also known as cholera vibrio, with the scientific name of Vibrio Cholerae, is a direct pathogen that exists in human and animal feces, spreading through the digestive tract. World history has recorded 7 cholera pandemics that occurred on many continents and took the lives of millions of people.