Norwalk-like viruses: Common names of the illness caused by the Norwalk and Norwalk-like viruses are viral gastroenteritis, acute nonbacterial gastroenteritis, food poisoning, and food infection. ... more about Norwalk-like viruses.
Norwalk-like viruses: Several shellfish or oyster-associated gastro-causing viruses related to Norwalk or caliciviruses. More detailed information about the symptoms, causes, and treatments of Norwalk-like viruses is available below.
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Prognosis for Norwalk-like viruses: Usually recovery within 2-3 days
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Common names of the illness caused by the Norwalk and Norwalk-like viruses are viral gastroenteritis, acute nonbacterial gastroenteritis, food poisoning, and food infection.
Norwalk virus is the prototype of a family of unclassified small round structured viruses (SRSVs) which may be related to the caliciviruses. They contain a positive strand RNA genome of 7.5 kb and a single structural protein of about 60 kDa. The 27-32 nm viral particles have a buoyant density of 1.39-1.40 g/ml in CsCl. The family consists of several serologically distinct groups of viruses that have been named after the places where the outbreaks occurred. In the U.S., the Norwalk and Montgomery County agents are serologically related but distinct from the Hawaii and Snow Mountain agents. The Taunton, Moorcroft, Barnett, and Amulree agents were identified in the U.K., and the Sapporo and Otofuke agents in Japan. Their serological relationships remain to be determined. (Source: FDA Bad Bug Book)
Caliciviruses are classified in the family Caliciviridae. They contain a single strand of RNA surrounded by a protein capsid of 31-40 nm diameter. Mature virions have cup-shaped indentations which give them a 'Star of David' appearance in the electron microscope. The particle contain a single major coat protein of 60 kDa and have a buoyant density in CsCl of 1.36 - 1.39 g/ml. Four serotypes have been identified in England. (Source: FDA Bad Bug Book)
Calicivirus, or Norwalk-like virus is an extremely common cause of foodborne illness, though it is rarely diagnosed, because the laboratory test is not widely available. It causes an acute gastrointestinal illness, usually with more vomiting than diarrhea, that resolves within two days. (Source: excerpt from Foodborne Infections General: DBMD)
Norwalk viruses (and related caliciviruses) are important causes of sporadic and epidemic gastrointestinal disease in the United States. An estimated 181,000 cases occur annually. (Source: excerpt from Facts About Norwalk-like Viruses: CDC-OC)
Type species in the genus Norovirus; the virions are non-enveloped spherical particles containing a single protein; multiple strains are named after the places where outbreaks have occurred. - (Source - Diseases Database)
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