Treatment of Viral Gastritis

Core Treatment Principles

The primary treatment for viral gastritis is oral rehydration therapy (ORT) to prevent dehydration, as the condition is self-limited and resolves within days without specific antiviral therapy, according to Praxis Medical Insights 1
Oral rehydration therapy is the cornerstone of management and should be the first-line approach for all patients with viral gastritis, as it is as effective as intravenous therapy for mild-to-moderate dehydration, as recommended by Praxis Medical Insights 1
The main therapeutic goal is preventing and correcting dehydration and electrolyte imbalances, which pose the primary risk rather than the viral infection itself, as stated by Praxis Medical Insights 1

Avoid antimotility drugs (loperamide) in children under 18 years, as advised by Praxis Medical Insights 1
Loperamide may be considered in immunocompetent adults with acute watery diarrhea, but avoid in inflammatory diarrhea or fever, according to Praxis Medical Insights 1
Bismuth subsalicylate may provide modest symptomatic relief, reducing illness duration by approximately 7 hours, as reported by Praxis Medical Insights 1
Continue feeding throughout illness, as early refeeding decreases intestinal permeability, reduces illness duration, and improves nutritional outcomes, as recommended by Praxis Medical Insights 1
Breast milk has protective effects and infants can be "fed through" episodes, according to Praxis Medical Insights 1
Mild lactose intolerance may occur for 10-14 days post-rotavirus infection; a lactose-free diet reduces diarrhea duration by 18 hours in children under 5 years, as stated by Praxis Medical Insights 1

Children are at the highest risk for dehydration but respond well to ORT, as noted by Praxis Medical Insights 1
Elderly patients on diuretics require special attention to hydration status due to increased dehydration risk, according to Praxis Medical Insights 1
Pregnant women are not at specific threat beyond dehydration risks; viremic states do not occur, so transplacental exposure risk is minimal, as reported by Praxis Medical Insights 1

Vigorous handwashing with soap is essential, as recommended by Praxis Medical Insights 1
Exclude symptomatic staff from patient contact for at least 2 days after symptom resolution, according to Praxis Medical Insights 1
Clean environmental surfaces, especially areas soiled by feces or vomitus, as advised by Praxis Medical Insights 1
Separate ill persons from well persons until 2 days after symptom resolution, as stated by Praxis Medical Insights 1

For immunocompromised patients (particularly hematology/oncology patients) with CMV gastroenteritis, specific antiviral treatment is required, with ganciclovir 5 mg/kg IV twice daily for 2-3 weeks (induction), followed by maintenance therapy, as recommended by the Annals of Oncology 2
Diagnosis requires CMV detection in endoscopic biopsy specimens from affected gastrointestinal mucosa, not just peripheral blood or stool, according to the Annals of Oncology 2
Alternative agents include foscarnet or cidofovir, though both carry significant renal toxicity, as noted by the Annals of Oncology 2

Do not delay ORT waiting for laboratory results, begin rehydration immediately based on clinical assessment, as advised by Praxis Medical Insights 1
Do not assume viral etiology if bloody diarrhea is present, this is atypical and requires investigation for bacterial or other causes, according to Praxis Medical Insights 3
Do not use rectal swabs for viral diagnosis, they have little to no diagnostic value, as reported by the MMWR Recommendations and Reports 4