Norovirus

Recently, cases of norovirus, commonly known as the “winter vomiting disease,” have been increasing in the United States, particularly during the colder months.

About Norovirus

Norovirus is a highly contagious virus that causes inflammation of the stomach and intestines, a condition known as gastroenteritis.

• It is also referred to as the “stomach flu” or the “winter vomiting bug.”

• Norovirus infections show a seasonal pattern, with outbreaks occurring more frequently in winter months.

• People of all age groups can be affected, as the virus spreads very easily and rapidly.

• Noroviruses are responsible for around 90% of viral gastroenteritis outbreaks and nearly 50% of cases worldwide.

• Individuals can be infected multiple times during their lifetime because many different strains of norovirus exist.

Mode of Transmission

Norovirus spreads through direct and indirect contact.

• Infection occurs through close contact with an infected person, consumption of contaminated food or water, or by touching contaminated surfaces.

• Outbreaks are common in closed and crowded environments such as hospitals, schools, and care homes.

• Infected persons remain contagious from the onset of symptoms to at least three days after recovery.

Symptoms

Norovirus infection usually presents with:

• Vomiting and diarrhoea

• Stomach cramps and nausea

• Fever and fatigue

In severe cases, excessive loss of fluids may result in dehydration, which requires prompt attention.

Treatment and Prevention

• Most patients recover completely without specific medical treatment.

• No vaccine is currently available to prevent norovirus infection.

• Treatment mainly focuses on relieving symptoms and maintaining hydration.

• In severe cases, patients may require intravenous rehydration fluids.

Norovirus vs Influenza (Stomach Flu)

• Norovirus causes gastroenteritis, affecting the digestive system.

• Influenza is caused by the influenza virus and primarily affects the respiratory system, not the stomach.