Protozoa
Abrupt onset of symptoms after ingestion
Afebrile or low-grade fever
Severe cases: profound dehydration
Cholera
Others; viral gastroenteritis, giardiasis and food poisoning due to Clostridium perfringens and S. aureus.
Cholera is a secretory diarrheal disease caused by enterotoxin-producing strains of V. cholerae