Basic Summary for Norwalk-like viruses


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Main name of condition: Norwalk-like viruses
Other names or spellings: Norwalk virus, Norwalk-like virus, Calicivirus, Caliciviruses, Calcivirus


What is Norwalk-like viruses?
  Brief description of Norwalk-like viruses: Several shellfish or oyster-associated gastro-causing viruses related to Norwalk or caliciviruses.
  Parent types of Norwalk-like viruses: Viral gastroenteritis, Food poisoning
How many people get Norwalk-like viruses?
  Incidence (annual) of Norwalk-like viruses: estimated 181,000 cases annually in USA (CDC-OC)
  Incidence Rate of Norwalk-like viruses: approx 1 in 1,502 or 0.07% or 181,000 people in USA [about data]
  Prevalance of Norwalk-like viruses: An estimated 181,000 cases occur annually. 1
Who gets Norwalk-like viruses?
  Profile for Norwalk-like viruses: Norwalk and Norwalk-like viruses are more likely to cause diarrhea in older children and adults.2 ... Norwalk and Norwalk-like viruses are more likely to cause diarrhea in older children and adults.2
How serious is Norwalk-like viruses?
  Prognosis of Norwalk-like viruses: Usually recovery within 2-3 days
What causes Norwalk-like viruses?
  Causes of Norwalk-like viruses: Viral gastroenteritis due to caliciviruses has been associated with eating contaminated oysters. Oysters can become contaminated before harvest or during preparation. Water and ice are other sources of infection. 1
  Causes of Norwalk-like viruses: see causes of Norwalk-like viruses
What are the symptoms of Norwalk-like viruses?
  Duration of Norwalk-like viruses: resolves within two days.3
  Symptoms of Norwalk-like viruses: see symptoms of Norwalk-like viruses

Footnotes:
1. excerpt from Facts About Norwalk-like Viruses: CDC-OC
2. excerpt from Viral Gastroenteritis: DVRD
3. excerpt from Foodborne Infections General: DBMD

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