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Lab Invest. 1983 Feb;48(2):140-7.

Experimental influenza B virus toxicity in mice. A possible model for Reye's syndrome.


Mice intravenously injected with concentrated infectious influenza B/Lee/40 virus (LD50 = 6400 hemagglutinin units) developed lethargy, seizures, coma, and death 1 to 3 days later. The cerebrospinal fluid cell count was normal. Serum glutamic oxaloacetic transaminase levels increased 19-fold and plasma ammonia levels elevated 2.6-fold over control values. Serum bilirubin levels remained normal. Microvesicular fatty metamorphosis developed in the liver, whereas the brain showed mild cerebral edema without inflammatory changes. Viral propagation did not occur in liver or brain, but viral hemagglutinin, neuraminidase, and probably nucleoprotein antigens were produced in hepatocytes. Many of the clinical, biochemical, and pathologic features of the mouse illness are similar to those seen in Reye's syndrome.

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