|Regional Update. Pandemic (H1N1) 2009. (published on November 16, 2009)|
These countries are reporting mostly unchanged trends in acute respiratory disease and high intensity of acute respiratory disease. Impact of acute respiratory disease on health care services was reported as moderate.
In countries providing these data1, severe acute respiratory infection (SARI) hospitalization rates decreased this week, after four consecutive weeks of increases.
This week, among the countries that provided information, trends of acute respiratory disease decreased. Intensity of acute respiratory disease remained low/moderate and impact of acute respiratory disease on health care services was low.
These countries continued to report widespread influenza activity. Acute respiratory disease trends were reported as decreasing or unchanged in most countries of the region, except Colombia and Peru, which reported an increasing trend in acute respiratory disease. In Peru, in the last week, the greatest increase in the number of confirmed cases was observed in parts of the northeast jungle region. In Ecuador, nationally, trends of acute respiratory disease were reported as unchanged, but 3 of 24 provinces reported increases in the number of SARI cases as compared to the prior week.
Most of these countries reported decreasing or unchanged trends of acute respiratory disease. This week, Paraguay reported 2 of 17 departments with an increasing trend of acute respiratory disease, as compared to 8 departments last week; its overall national trend was decreasing. All of these countries are reporting a low or moderate impact of acute respiratory disease on health care services.
II-Descriptions of hospitalizations and deaths among confirmed cases of pandemic (H1N1) 2009
A table containing case counts reported to PAHO is included in Annex 2.
Approximately half of hospitalized cases were among women (Table 1). Children continued to be the age group with highest hospitalization rates. Underlying comorbidities were present in approximately half of hospitalized cases.
Overall, approximately half of deceased cases were among women (Table 2). In the Dominican Republic, however, 82% of their 22 deaths were among women and approximately 67% of deaths among women were in pregnant women.
The percentage of cases with underlying co-morbidities varied from 58.3% to 76.1%.
III- Viral circulation
For the purpose of this analysis, only countries which reported data on influenza A subtypes were considered. We excluded from the calculations of the percentages, results from samples of influenza A that were not subtyped or were unsubtypeable.
Pandemic (H1N1) 2009 continues to predominate among circulating subtyped influenza A viruses.
IV-Antiviral ResistanceThe Centers for Disease Control and Prevention (CDC) complete antiviral susceptibility testing on isolates submitted by various countries in the Region. To date, 277 samples submitted from 18 countries were found to be sensitive to neuraminidase inhibitors (oseltamivir and zanamivir). In the United States, a total of 15 cases of oseltamivir-resistance have been identified. Of the 15 oseltamivir-resistant cases, 13 had documented exposure to oseltamivir, one case had no documented oseltamivir-exposure, and one case is under investigation.
As of 13 November, a total of 4,806 deaths have been reported among the confirmed cases in 27 countries of the Region.
In addition to the figures displayed in Annex 2, the following overseas territories have confirmed deaths of pandemic (H1N1) 2009: United Kingdom Overseas Territories; Cayman Islands (1 death); French Overseas Communities: Martinique (1 death); Guadeloupe (1 death).
The distribution of cases and deaths at the first sub-national level can be found in the interactive map available through the following link: http://www.paho.org/hq/images/atlas/en/atlas.html
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|Last Updated on Tuesday, 17 November 2009 11:11|