Norovirus - Highly contagious gastrointestinal pathogen: symptoms, course and protective measures

Noroviruses are highly contagious pathogens that cause gastrointestinal infections. Here you can find out everything about symptoms, transmission, treatment and how you can protect yourself against norovirus.

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Wissenswertes über "Novovirus"

Noroviruses are highly contagious pathogens that cause gastrointestinal infections. Here you can find out everything about symptoms, transmission, treatment and how you can protect yourself against norovirus.

Noroviruses belong to the family of Caliciviridae (gastrointestinal diseases).Caliciviridae and are one of the most common causes of acute gastrointestinal illnesses (gastroenteritis) worldwide. Even a small amount of virus is enough to trigger an infection - which is why norovirus is considered highly contagious. Infections occur all year round, but are particularly common in the winter months and in community facilities such as schools, daycare centres, care homes and hospitals.

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Transmission and incubation period

Noroviruses spread via different routes:

Fecal-oral smear infection (e.g. via contaminated hands, surfaces, objects)
Contact with infected persons or their faeces
Consumption of contaminated food or drinking water
Aerosols during vomiting, which can spread the virus through the air

The incubation period is usually 12 to 48 hours.

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Symptoms

The disease often begins suddenly and violently:

Strong, gushy vomiting
Watery diarrhoea
Abdominal cramps, nausea, headache and muscle pain
In severe cases: Circulatory weakness or dehydration

The symptoms usually last 12 to 72 hours. A norovirus infection is rarely severe, but can be dangerous for infants, the elderly and immunocompromised people.

Diagnostics and mandatory reporting

Diagnosis is usually carried out with a stool sample using PCR. In Germany, the infection is reportable under the Infection Protection Act if it is suspected or proven in a person who works in the food sector or is cared for in communal facilities.

Treatment

There is no specific antiviral therapy against noroviruses. Treatment is symptomatic:

Compensation of fluid and electrolyte loss (e.g. with isotonic solutions)
If necessary: sparing diet, bed rest, medical monitoring for high-risk patients if necessary

Antibiotics are not effective, as it is a virus.

Prevention and hygiene measures

Since noroviruses are very resistant to environmental influences and disinfectants, consistent hygiene measures are crucial:

Wash hands frequently and thoroughly with soap
Surface disinfection with virucidal agents (limited virucidal PLUS)
Avoid communal facilities until 2 days after symptoms have subsided
Wash clothes at high temperatures (at least 60 °C)

A vaccination against noroviruses is currently not available, but is being intensively pursued in research.

Literature references:

Robert Koch Institute (2024). "Noroviruses - pathogen profile."
Atmar, R. L. & Estes, M. K. (2006). "The Epidemiologic and Clinical Importance of Norovirus Infection." Gastroenterology.
Glass, R. I. et al. (2009). "The Emerging Threat of Norovirus." New England Journal of Medicine.