It is extremely rare but extremely dangerous. See a doctor immediately. Symptoms are severe. You have a fever above 101. You have signs of dehydration.
Diarrhea is extremely watery or explosive.
Diarrhea occurs 10 or more times in a day. You cannot drink anything without vomiting. You feel faint, become weak and light-headed. Pus or mucus is mixed in with your stools. Symptoms do not go away in two days.