The subdivisions of gastroenteritis or colitis of infectious origin classified in the ICD-11 include:

• Bacterial Intestinal Infection
• Bacterial Foodborne Intoxications
• Viral Intestinal Infections
• Protozoal Intestinal Infections
• Intestinal Fungal Infections
• 1A49 Gastroenteritis or Colitis without Specification of Infectious Agent

Reference: World Health Organization. (2019). International Statistical Classification of Diseases and Related Health Problems (11th ed.).