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Norovirus Outbreak

Clinical features and outbreak control of norovirus, the most common cause of acute gastroenteritis in adults and all ages.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Internal Medicine department. Book Appointment →

What is Norovirus Outbreak?

Norovirus is a single-stranded RNA virus from the Caliciviridae family and is the most common cause of acute gastroenteritis worldwide across all age groups. It is estimated to cause 19-21 million gastroenteritis cases per year in the United States alone.

The virus is extremely contagious; only 18-20 viral particles are sufficient for infection. Transmission is fecal-oral and vomitus-oral, and it also spreads through contaminated food, water and surfaces. It causes outbreaks in communal settings (cruise ships, nursing homes, schools, hospitals).

The incubation period is 12-48 hours and illness usually lasts 1-3 days. A vaccine is not yet in widespread use; hygiene and isolation remain the cornerstone of outbreak control.

Symptoms

Sudden-onset vomiting
Watery, non-bloody diarrhea
Abdominal pain and cramps
Nausea and headache
Low-grade fever and myalgia
Malaise and loss of appetite
Usually resolves within 24-72 hours

Risk Factors

Communal living settings (dormitories, military barracks, ships)
Restaurant and catering food
Inadequate hand hygiene
Close contact with a sick person
Consumption of contaminated water and seafood
Nursing homes and hospitals
Winter months (winter vomiting disease)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Vomiting and diarrhea lasting more than 72 hours
  • Signs of dehydration (dry mouth, decreased urination)
  • High fever or bloody diarrhea
  • Severe course in elderly and immunosuppressed patients
  • Lethargy in infants and young children

Treatment Methods

01
Oral rehydration and fluid support
02
Maintenance of electrolyte balance
03
Antiemetics (used cautiously when needed)
04
Avoid antibiotics (viral cause)
05
Patient isolation (transmission control)
06
Environmental cleaning with chlorine-based disinfectants

Which Department to Visit?

You can visit our Enfeksiyon Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Enfeksiyon Hastalıkları Department

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You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.