Enteritis Causes and Complications

Bacterial Causes

The American Gastroenterological Association notes that bacterial pathogens, including Campylobacter, Salmonella, Shigella, Escherichia coli, and Clostridium difficile, are major causes of enteritis, particularly in individuals with recent antibiotic use or in healthcare settings 1, 2
Bacterial enteritis often causes more severe symptoms, including fever, bloody diarrhea, and pronounced inflammation, as reported by the Infectious Diseases Society of America 1, 2
Vibrio cholerae is associated with post-infectious irritable bowel syndrome in 16.5% of cases, according to the American Gastroenterological Association 1

The Centers for Disease Control and Prevention state that norovirus is the leading cause of gastroenteritis outbreaks, and other viral pathogens generally cause less mucosal damage than bacterial agents 1, 2, 3

The Infectious Diseases Society of America reports that parasitic infections, including Giardia lamblia, Cryptosporidium, Cyclospora, and Cystoisospora, can cause enteritis, particularly in immunocompromised patients 2, 3, 4

The American College of Gastroenterology notes that travel-related risk factors, such as recent travel to endemic areas, consumption of contaminated food or water, and immunocompromised status, increase the risk of enteritis 2, 3, 4, 5
Host factors, including advanced age, malnutrition, or obese BMI, also increase susceptibility to enteritis, as reported by the European Society of Clinical Microbiology and Infectious Diseases 5

The American Gastroenterological Association states that post-infectious irritable bowel syndrome develops in 10.1% of patients within 12 months after infectious enteritis, with a 4.2-fold increased risk compared to uninfected individuals 1
Bacterial infections carry a higher risk of post-infectious complications than viral infections, according to the European Society of Gastrointestinal Endoscopy 1, 6

The Infectious Diseases Society of America recommends that the diagnostic approach be guided by the presence of fever or bloody diarrhea, duration of symptoms, recent antibiotic exposure, and travel history 2, 4, 7
Multiple stool examinations may be necessary for detecting certain pathogens, and immunocompromised patients may require more extensive testing, as reported by the American Society of Clinical Pathology 4, 7