Giuseppe
Emeritus
WHO. Influenza A(H1N1) virus resistance to oseltamivir - 2008/2009 influenza season, northern hemisphere (March 21, 2009)
Influenza A(H1N1) virus resistance to oseltamivir - 2008/2009 influenza season, northern hemisphere
18 March 2009
[Original PDF Document at this LINK. EDITED.]
During weeks 1-4 (28 December 08 ? 24 January 09), the level of overall influenza activity in the world increased. In Europe, most countries reported regional or widespread activity with influenzaA (H3) viruses predominating.
Widespread influenza A activity (H1 and H3) was reported in Japan. In Canada, Hong Kong SAR and the United States, influenza activity increased but remained relatively low. Sporadic influenza activity was observed in Brazil (A), Croatia (H1,H3, B), Greece (H1, H3, B), Iran (H1, H3), Mongolia (A), Portugal (H1, H3, B), Serbia (H1, H3, B), Singapore (H1, H3, B), Slovakia (H3) and Turkey (H3, B).
During this period, a total of 30 countries from all WHO regions reported oseltamivir resistance for 1291 of 1362 A(H1N1) viruses analysed. The prevalence of oseltamivir resistance was very high in the following countries/territory: Canada (52 of 52 tested), Hong Kong SAR (72 of 80), Japan (420 of 422), the Republic of Korea (268 of 269) and the United States of America (237 of 241).
The resistance prevalence was relatively low in China (6 of 44 tested). In Europe, H1N1 circulation was low during this period while the resistance prevalence was high: France (12 of 12tested), Germany (66 of 67), Ireland (9 of 10), Italy (16 of 16), Sweden (11 of 12) and the United Kingdom (61 of 62).
WHO is collecting global data about this phenomenon from multiple laboratories participating in Global Influenza Surveillance Network. Data from European countries participating in EISS were provided by the EISS and VirGil project. This summary table will be updated regularly (every four weeks).
Oseltamivir resistance results were based on phenotypic and/or genotypic analyses. A comprehensive table of influenza A(H1N1)virus resistance to oseltamivir (Fourth quarter 2008 - 31 January 2009) can be found on the following page.
<table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table>
<table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table>
<table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table>
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Influenza A(H1N1) virus resistance to oseltamivir - 2008/2009 influenza season, northern hemisphere
18 March 2009
[Original PDF Document at this LINK. EDITED.]
During weeks 1-4 (28 December 08 ? 24 January 09), the level of overall influenza activity in the world increased. In Europe, most countries reported regional or widespread activity with influenzaA (H3) viruses predominating.
Widespread influenza A activity (H1 and H3) was reported in Japan. In Canada, Hong Kong SAR and the United States, influenza activity increased but remained relatively low. Sporadic influenza activity was observed in Brazil (A), Croatia (H1,H3, B), Greece (H1, H3, B), Iran (H1, H3), Mongolia (A), Portugal (H1, H3, B), Serbia (H1, H3, B), Singapore (H1, H3, B), Slovakia (H3) and Turkey (H3, B).
During this period, a total of 30 countries from all WHO regions reported oseltamivir resistance for 1291 of 1362 A(H1N1) viruses analysed. The prevalence of oseltamivir resistance was very high in the following countries/territory: Canada (52 of 52 tested), Hong Kong SAR (72 of 80), Japan (420 of 422), the Republic of Korea (268 of 269) and the United States of America (237 of 241).
The resistance prevalence was relatively low in China (6 of 44 tested). In Europe, H1N1 circulation was low during this period while the resistance prevalence was high: France (12 of 12tested), Germany (66 of 67), Ireland (9 of 10), Italy (16 of 16), Sweden (11 of 12) and the United Kingdom (61 of 62).
WHO is collecting global data about this phenomenon from multiple laboratories participating in Global Influenza Surveillance Network. Data from European countries participating in EISS were provided by the EISS and VirGil project. This summary table will be updated regularly (every four weeks).
Oseltamivir resistance results were based on phenotypic and/or genotypic analyses. A comprehensive table of influenza A(H1N1)virus resistance to oseltamivir (Fourth quarter 2008 - 31 January 2009) can be found on the following page.
<table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table><table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table><table style="width: auto;"><tbody><tr><td>
</td></tr><tr><td style="font-family: arial,sans-serif; font-size: 11px; text-align: right;">From TABLES</td></tr></tbody></table>-
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