Abstract: H275Y (H274Y according to N2 numbering) mutation, which is known to confer resistance to oseltamivir, was detected in 6 out of 30 (20%) H1N1 isolates from four cities (Istanbul, Bursa, Ankara, and Izmir).
Oseltamivir-resistant novel influenza A (H1N1) virus infection in two immunosuppressed patients - Seattle, Washington, 2009.
PMID: 19696719
2009
MMWR. Morbidity and mortality weekly report
Abstract: Testing of viral RNA from both patients by pyrosequencing detected a mutation that results in a histidine-to-tyrosine substitution at position 275 (H275Y) in the neuraminidase, known to be associated with oseltamivir resistance.
Novel pandemic influenza A(H1N1) viruses are potently inhibited by DAS181, a sialidase fusion protein.
Discussion: The most common mutation conferring oseltamivir-resistance involves H274Y (H275Y in N1 numbering) substitution in the neuraminidase of viruses of N1 antigenic subtype (H1N1 and H5N1).
IV mutation literature information.
PMID: 
2009
Journal of medical virology
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