Emergence of Multidrug-Resistant Influenza A(H1N1)pdm09 Virus Variants in an Immunocompromised Child Treated With Oseltamivir and Zanamivir.

Tamura, Daisuke; DeBiasi, Roberta L; Okomo-Adhiambo, Margaret; Mishin, Vasiliy P; Campbell, Angela P; Loechelt, Brett; Wiedermann, Bernhard L; Fry, Alicia M et al. · J Infect Dis · 2015

case_report · Level V

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Abstract

Prolonged treatment of an immunocompromised child with oseltamivir and zanamivir for A(H1N1)pdm09 virus infection led to the emergence of viruses carrying H275Y and/or E119G in the neuraminidase (NA). When phenotypically evaluated by NA inhibition, the dual H275Y-E119G substitution caused highly reduced inhibition by 4 NA inhibitors: oseltamivir, zanamivir, peramivir, and laninamivir.

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