RUO

Background

Diarrhea is one of the most common clinical diseases, characterized by symptoms such as abdominal pain, nausea, vomiting, and fever. Infections of the small intestine often present with watery diarrhea, whereas infections of the large intestine frequently involve bloody stools, among other varied symptoms. It can be caused by multiple pathogens, including bacteria, viruses, and parasites. Parasites and fungi account for a notable yet often overlooked proportion of diarrheal pathogens, posing diagnostic challenges.