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acute infectious nonbacterial gastroenteritis -- epidemic, highly communicable disease of sudden onset, caused by the epidemic gastroenteritis virus (especially Norwalk agent) which affects all age groups; infection is associated with fever, abdominal cramps, nausea, vomiting, diarrhea, and headache, one or another of which may be predominant.

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acute infectious nonbacterial gastroenteritis
  • About Norovirus from National Institute of Infectious, Immunologic and Allergic Diseases.

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Communicable Diseases -- broad class of diseases whose causative agents may be passed between individuals in many different ways.

Infection -- Invasion of the host organism by microorganisms that can cause pathological conditions or diseases.

Gastroenteritis -- INFLAMMATION of any segment of the GASTROINTESTINAL TRACT from ESOPHAGUS to RECTUM. Causes of gastroenteritis are many including genetic, infection, HYPERSENSITIVITY, drug effects, and CANCER.

Inflammation -- A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function.

Influenza -- acute viral infection involving the respiratory tract; marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia.

Orthomyxoviridae -- RNA viruses; virus attaches to host cell receptors and enters by fusion of virus envelope with plasma membrane; wide host range, including man, pigs, horses and birds; transmission is by contact or by aerosol and waterborne.

Norovirus -- A genus in the family CALICIVIRIDAE, associated with epidemic GASTROENTERITIS in humans. The type species, NORWALK VIRUS, contains multiple strains.

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