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effectiveness of tamiflu for treatement of A and B flu : comparison

Anne

Senior Moderator
<dl class="PubmedArticle" id="dlPubmedArticle16838232"><dt class="head" id="head16838232">1: Clin Infect Dis. 2006 Aug 15;43(4):439-44. Epub 2006 Jun 26. <script language="JavaScript1.2"> <!-- var PopUpMenu2_LocalConfig_jsmenu3Config = [ ["ShowCloseIcon","yes"], ["Help","window.open('/entrez/query/static/popup.html','Links_Help','resizable=no,scrollbars=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no,alwaysRaised=no,depend=no,width=400,height=500');"], ["TitleText"," Links "] ] var jsmenu3Config = [ ["UseLocalConfig","jsmenu3Config","",""] ] //--> </script> <script language="JavaScript1.2"> <!-- var Menu16838232 = [ ["UseLocalConfig","jsmenu3Config","",""], ["Compound via MeSH","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&db=pubmed&cmd=Display&dopt=pubmed_pccompound_mesh&from_uid=16838232'","",""], ["Substance via MeSH","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&db=pubmed&cmd=Display&dopt=pubmed_pcsubstance_mesh&from_uid=16838232'","",""], ["Books","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&cmd=Retrieve&db=pubmed&list_uids=16838232&dopt=Books'","",""], ["LinkOut","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&cmd=Retrieve&db=pubmed&list_uids=16838232&dopt=ExternalLink'","",""] ] //--> </script> Links
</dt><dd class="abstract" id="abstract16838232"><dl class="commcorr"><dt class="commcorr">Comment in:</dt><dd>Clin Infect Dis. 2006 Aug 15;43(4):445-6.</dd></dl> A comparison of the effectiveness of oseltamivir for the treatment of influenza A and influenza B: a Japanese multicenter study of the 2003-2004 and 2004-2005 influenza seasons.

Japan Physicians Association, Tokyo, Japan. nkawai@city.gifu.med.or.jp
BACKGROUND: To compare the effectiveness of oseltamivir for treatment of influenza A and influenza B, we conducted a prospective, multicenter study of the 2003-2004 and 2004-2005 influenza seasons. The study included 3351 patients in whom influenza had been diagnosed by use of an antigen detection test kit. METHODS: Oseltamivir was administered to 1818 patients with influenza A and 1485 patients with influenza B. No anti-influenza drugs were administered to 21 patients with influenza A or to 27 patients with influenza B. Patients receiving oseltamivir therapy were divided into 4 groups according to the time between the onset of fever (temperature, > or = 37.5 degrees C) and administration of the first dose of oseltamivir (0-12 h, 13-24 h, 25-36 h, and 37-48 h). The patients were also divided into 4 subgroups on the basis of age (0-6 years, 7-15 years, 16-64 years, and >64 years). Virus isolation was performed after completion of oseltamivir therapy for 44 patients with influenza A and 31 patients with influenza B. RESULTS: The duration of fever was significantly shorter for patients with influenza A and B who were treated with oseltamivir than for patients who were not treated with an anti-influenza drug (P<.001 for both). The time until the patient became afebrile after the initial administration of oseltamivir and the duration of fever were significantly longer for patients with influenza B than for patients with influenza A for the 0-12 h, 13-24 h, 25-36 h, and 37-48 h groups (P<.001) and for all age groups (P<.001). After 4-6 days of oseltamivir therapy, the influenza B virus reisolation rate (51.6%) was significantly higher than the influenza A virus reisolation rate (15.9%) (P<.001). CONCLUSION: Oseltamivir is less effective for influenza B than for influenza A with regard to duration of fever and virus persistence, irrespective of patient age or the timing of administration of the first dose.
PMID: 16838232 [PubMed - indexed for MEDLINE
</dd></dl>
 
Re: effectiveness of tamiflu for treatement of A and B flu : comparison

<dl class="PubmedArticle" id="dlPubmedArticle11982659"><dt class="head" id="head11982659">1: J Am Geriatr Soc. 2002 Apr;50(4):608-16. <script language="JavaScript1.2"> <!-- var PopUpMenu2_LocalConfig_jsmenu3Config = [ ["ShowCloseIcon","yes"], ["Help","window.open('/entrez/query/static/popup.html','Links_Help','resizable=no,scrollbars=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no,alwaysRaised=no,depend=no,width=400,height=500');"], ["TitleText"," Links "] ] var jsmenu3Config = [ ["UseLocalConfig","jsmenu3Config","",""] ] //--> </script> <script language="JavaScript1.2"> <!-- var Menu11982659 = [ ["UseLocalConfig","jsmenu3Config","",""], ["Compound via MeSH","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&db=pubmed&cmd=Display&dopt=pubmed_pccompound_mesh&from_uid=11982659'","",""], ["Substance via MeSH","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&db=pubmed&cmd=Display&dopt=pubmed_pcsubstance_mesh&from_uid=11982659'","",""], ["Books","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&cmd=Retrieve&db=pubmed&list_uids=11982659&dopt=Books'","",""], ["LinkOut","window.top.location='http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=pubmed_AbstractPlus&cmd=Retrieve&db=pubmed&list_uids=11982659&dopt=ExternalLink'","",""] ] //--> </script> Links
</dt><dd class="abstract" id="abstract11982659">Use of oseltamivir during influenza outbreaks in Ontario nursing homes, 1999-2000.

Department of Pharmacy, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario.
OBJECTIVES: To describe the experience of Ontario long-term care facilities that used oseltamivir during influenza outbreaks in 1999/2000. DESIGN: Case series. SETTING: Ten Ontario long-term care facilities for older people and their residents. PARTICIPANTS: Older residents of long-term care facilities. INTERVENTION: Oseltamivir for treatment or prophylaxis during 11 influenza outbreaks in 1999/2000. MEASUREMENTS: Control of outbreaks; pneumonia, hospitalization, and death complicating acute influenza. RESULTS: All outbreaks were due to influenza A//H3N2/Sydney/05/97. One facility elected to use oseltamivir for treatment and amantadine for prophylaxis. The remaining nine facilities (10 outbreaks) recommended oseltamivir for treatment and prophylaxis (after amantadine failure in five and as primary prophylaxis in five).

</dd><dd class="abstract" id="abstract11982659">Use of oseltamivir was associated with termination of the outbreak in all eight evaluable outbreaks. Overall, 178/185 (96%) case-residents met the case definition of influenza and had complete data for evaluation. Of these, 63 (35%) were treated with antibiotics, 37 (21%) were diagnosed with pneumonia, 19 (11%) were hospitalized, and 16 (9%) died. Compared with residents receiving no therapy or who became ill while taking amantadine, residents who received oseltamivir within 48 hours of the onset of symptoms were less likely to be prescribed antibiotics, to be hospitalized, or to die (P <.05 for each outcome).
</dd><dd class="abstract" id="abstract11982659">
</dd><dd class="abstract" id="abstract11982659"> These differences persisted and remained statistically significant when corrected for influenza immunization status. A total of 730 residents received oseltamivir prophylaxis for a median of 9 days (range 5-12). Of these, side effects were identified in 30 (4.1%), the most common being diarrhea (12 residents, 1.6%), cough (5, 0.7%), confusion (4, 0.5%) and nausea (4, 0.5%). CONCLUSIONS: Oseltamivir is safe and appears to be effective when used as treatment or prophylaxis to control outbreaks of influenza in older nursing home residents.
PMID: 11982659 [PubMed - indexed for MEDLINE]
</dd></dl>
 
Re: effectiveness of tamiflu for treatement of A and B flu : comparison

they don't mention any mutations ?
Is flu-B more likely to develope resistance mutations ?
 
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