Nadene Goldfoot
- School Outbreaks: Health officials confirmed a substantial norovirus outbreak at a Portland-metro area elementary school, with around 85 cases reported.
- Statewide Surveillance: According to the CDC NoroSTAT Data, Oregon's overall norovirus activity for the start of this seasonal cycle remains within normal historical ranges, though officials have warned of a highly active respiratory and gastrointestinal virus season ahead.
- Norovirus is a highly contagious virus that causes acute gastroenteritis (inflammation of the stomach and intestines). It is the leading cause of vomiting, diarrhea, and foodborne illness in the United States.
- How you catch it: Contaminated surfaces or objects: Touching a surface with the virus and then touching your mouth or face.
- Contaminated food or water: Eating food prepared by someone who is sick or consuming raw/undercooked shellfish.
- Note: Infected people can shed billions of viral particles, and it only takes a few to make someone sick. Viral shedding can continue in stool for two weeks or more after recovery.
- No specific medicine: There is no antiviral medication or vaccine for norovirus, and antibiotics do not work because it is a virus.
- Supportive care: The main goal is to rest and prevent dehydration by drinking plenty of fluids (water, oral rehydration solutions, or clear broths). Severe dehydration may require intravenous (IV) fluids at a medical facility.
- When to see a doctor: If you cannot keep fluids down, show signs of severe dehydration (extreme thirst, little to no urination, dizziness), or if symptoms last beyond a few days (especially in young children, older adults, or immunocompromised individuals).
- Handwashing: Wash your hands thoroughly with soap and water for at least 20 seconds, especially after using the bathroom or changing diapers, and before eating or preparing food. Alcohol-based hand sanitizers are not effective against norovirus.
- Surface cleaning: Clean and disinfect contaminated surfaces (especially after vomiting or diarrhea) using a bleach-based household cleaner.
- Stay home: Remain at home while sick and for at least 48 hours after symptoms stop to prevent spreading the virus to school, work, or the community.
- Assisted Living Centers that have a population of residents that live altogether for meals and staff that come and go are a similar situation to a cruise ship.
Cruises are sold as floating holidays, but they are also useful for understanding public health. Cruise ships are carefully designed places where many people live, eat, relax and move through the same shared spaces for days at a time.
Think of a cruise ship as a temporary city at sea. It has restaurants, theatres, lifts, cabins, kitchens, water systems and indoor gathering spaces. That is great for convenience, but it also means that once an infection gets on board, it can move through the ship in ways that are hard to stop.
The Diamond Princess outbreak is perhaps the best-known example. During the 2020 COVID outbreak, 619 passengers and crew tested positive for the disease. Researchers found that the ship conditions made the novel coronavirus spread more easily. Their modelling suggested that public health measures, such as isolation and quarantine, prevented many more cases, but it also showed that an earlier response would have further limited the outbreak.
Norovirus (the so-called vomiting bug) is the infection most closely linked to cruise ships. In a review of previously published studies, researchers found 127 reports of norovirus outbreaks on cruise ships, with many linked to contaminated food, contaminated surfaces and person-to-person spread. A more recent report from the US also showed that norovirus can spread very rapidly from person to person on a cruise ship. They show how easily illness can spread when people are packed into a single interconnected environment. Unfortunately, this is so true of day-care.
Flu or Noro virus ?
You’re fine one minute, and the next, it hits you: stomach pain, nausea, vomiting and diarrhea.
You’ve got a stomach bug. And while a few different germs could be to blame, chances are it’s the dreaded norovirus, the most common cause of these symptoms. Each year, norovirus sickens about 20 million Americans and causes around 900 deaths, mostly among adults 65 and older.
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