Evidence for zanamivir resistance in an immunocompromised child infected with influenza B virus.

Abstract excerpt

Zanamivir, a neuraminidase inhibitor, has shown promise as a drug to control influenza. During prolonged treatment with zanamivir, a mutant virus was isolated from an immunocompromised child infected with influenza B virus. A hemagglutinin mutation (198 Thr-->Ile) reduced the virus affinity for receptors found on susceptible human cells. A mutation in the neuraminidase active site (152 Arg-->Lys) led to a...

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