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Comparison of the clinical symptoms and the effectiveness of neuraminidase inhibitors for patients with pandemic influenza H1N1 2009 or seasonal H1N1 influenza in the 2007-2008 and 2008-2009 seasons.
MedLine Citation:
PMID:  21120678     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The clinical symptoms and effectiveness of neuraminidase inhibitors (NAI) have not been adequately compared among pandemic H1N1 2009 patients, seasonal H1N1 patients, and patients with H1N1 with the H275Y mutation. The data of 68 seasonal H1N1 patients in 2007-2008, 193 seasonal H1N1 patients in 2008-2009, and 361 pandemic H1N1 2009 patients diagnosed by PCR who received an NAI were analyzed. The duration of fever (body temperature ≥37.5ºC) after the first dose of NAI and from onset was calculated. The H275Y neuraminidase mutation status was determined for 166 patients. Significantly lower mean age (18.4 ± 13.2 years) and a higher percentage of teenagers (53.7%) were found for pandemic 2009 influenza than for seasonal influenza (P < 0.001). The peak body temperature was equivalent (mean, 39.0ºC) in the three seasons, and the frequency of symptoms was the same or lower for pandemic influenza compared with seasonal H1N1. None of the 34 analyzed pandemic H1N1 virus isolates contained the H275Y mutation, which was commonly detected in the 2008-2009 season. The duration of fever after the start of oseltamivir therapy was significantly shorter for patients with pandemic (23.0 ± 11.6 h) than with seasonal H1N1 in both the 2008-2009 (49.7 ± 32.3 h) and 2007-2008 seasons (32.0 ± 18.9 h). The mean duration of fever after the first dose of zanamivir was not different among the three seasons (26.9-31.5 h). Clinical symptoms were the same or somewhat milder, and oseltamivir was more effective, for pandemic 2009 than for seasonal H1N1 influenza with or without H275Y mutation.
Authors:
Naoki Kawai; Hideyuki Ikematsu; Osame Tanaka; Shinro Matsuura; Tetsunari Maeda; Satoshi Yamauchi; Nobuo Hirotsu; Mika Nishimura; Norio Iwaki; Seizaburo Kashiwagi
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Publication Detail:
Type:  Journal Article     Date:  2010-12-01
Journal Detail:
Title:  Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy     Volume:  17     ISSN:  1437-7780     ISO Abbreviation:  J. Infect. Chemother.     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-06-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9608375     Medline TA:  J Infect Chemother     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  375-81     Citation Subset:  IM    
Affiliation:
Japan Physicians Association, Tokyo Medical Association Building 3F, 2-5 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan, nkawai@city.gifu.med.or.jp.
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