Overview
Infectious diarrhea is characterized by loose or watery stools resulting from viral, bacterial, or parasitic infections, impacting both pediatric and adult populations 12.Diagnosis
Clinical Presentation: Assess for symptoms such as frequency, volume, and appearance of stools, along with associated symptoms like fever, abdominal pain, and bloody diarrhea 1.
Laboratory Tests: Stool cultures, ova and parasite exams, and antigen tests for specific pathogens (e.g., norovirus, Campylobacter) 1.
Imaging and Other Tests: Generally not required unless extraintestinal complications are suspected 1.Management
First-Line Treatments:
- Rehydration: Oral rehydration solutions (ORS) for mild cases; intravenous fluids for severe dehydration 1.
- Antibiotics: Reserved for specific bacterial causes (e.g., Shigella, Campylobacter) based on clinical judgment and local resistance patterns 1.
Adjunctive Treatments:
- Probiotics: Considered for reducing duration and severity in some cases, though evidence varies 4.
- Antidiarrheal Agents: Loperamide should be used cautiously and typically not recommended in suspected bacterial infections to avoid complications 1.Special Populations
Pregnancy: Rehydration remains critical; antibiotics should be used selectively based on pathogen identification 1.
Pediatrics: Focus on prompt rehydration therapy; avoid unnecessary antibiotics unless specific pathogens are identified 1.
Elderly: Increased vigilance for dehydration and complications; tailored rehydration and supportive care 1.
Comorbidities: Management should consider underlying conditions; close monitoring for complications is essential 1.Key Recommendations
Rehydration Therapy: Prioritize oral rehydration solutions for mild cases and intravenous fluids for severe dehydration (Evidence: Strong 1).
Antibiotic Use: Reserve antibiotics for confirmed bacterial infections based on clinical and laboratory findings (Evidence: Moderate 1).
Probiotic Use: Consider probiotics to potentially reduce duration and severity, though evidence is not uniformly strong (Evidence: Weak 4).
Avoid Unnecessary Antidiarrheals: Caution with loperamide in suspected bacterial diarrhea to prevent complications (Evidence: Expert opinion 1).References
1 Shane AL, Mody RK, Crump JA, Tarr PI, Steiner TS, Kotloff K et al.. 2017 Infectious Diseases Society of America Clinical Practice Guidelines for the Diagnosis and Management of Infectious Diarrhea. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2017. link
2 Shane AL, Mody RK, Crump JA, Tarr PI, Steiner TS, Kotloff K et al.. 2017 Infectious Diseases Society of America Clinical Practice Guidelines for the Diagnosis and Management of Infectious Diarrhea. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2017. link
3 Tripoli LC, Brouillette DE, Nicholas JJ, Van Thiel DH. Disseminated Yersinia enterocolitica. Case report and review of the literature. Journal of clinical gastroenterology 1990. link
4 Raettig H. Paramunity after oral immunization. Le Poumon et le coeur 1982. link