Norovirus Infection Management

Primary Treatment Strategy

The primary treatment goal for norovirus gastroenteritis is oral rehydration therapy to prevent dehydration, with escalation to intravenous fluid therapy if oral intake is inadequate or signs of severe dehydration are present, as recommended by the American Academy of Pediatrics and the Centers for Disease Control and Prevention 2, 3
Approximately 10% of patients with norovirus require medical attention, including hospitalization for dehydration management, according to the Centers for Disease Control and Prevention 3

Antimotility agents, such as loperamide, may be used in immunocompetent adults with nonbloody diarrhea as part of self-treatment, as suggested by the American Gastroenterological Association 2

Symptoms of norovirus infection begin 12-48 hours after exposure and typically last 12-72 hours with self-resolution in immunocompetent individuals, as reported by the World Health Organization 1, 2, 4
Immunocompromised patients, especially allogeneic stem cell transplant recipients, face mortality rates up to 25% from norovirus gastroenteritis, according to the American Society of Transplantation 1, 4

Handwashing with soap and running water for at least 20 seconds is the most effective method to reduce norovirus contamination, as recommended by the Centers for Disease Control and Prevention 5, 2, 4
Isolate ill patients in institutional settings until 24-48 hours after complete symptom resolution, and exclude ill healthcare workers and food handlers from work until 48-72 hours after symptom resolution, as suggested by the Centers for Disease Control and Prevention 6, 2, 4

Severe dehydration unresponsive to oral rehydration therapy, elderly patients or those in long-term care facilities, and immunocompromised patients with prolonged symptoms or evidence of malnutrition require hospitalization, as recommended by the American College of Emergency Physicians 3, 1, 4
Vomiting or diarrhea persisting for more than one week is atypical and requires immediate evaluation for alternative diagnoses, according to the American Gastroenterological Association 2, 3