niman wrote:
On March 24, Mexico reported an influenza A outbreak in the state of Chihuahua (northern part of Mexico). Two cities are primarily affected: Juarez and Chihuahua. Between March 22 and April 6, there have been 163 cumulative cases of ILI and severe acute respiratory infection (SARI) identified (29% of which were confirmed to be influenza A/H1N1 2009) and seven deaths (all adults, previously healthy, including one pregnant woman), of which six were confirmed to have influenza A/H1N1 2009. The genetic sequencing of the first three pandemic (H1N1) 2009 influenza cases (two fatal cases and one mild) reported that the virus is homologous to the one that is currently circulating worldwide. Thus far, there is no evidence that the influenza strains identified have mutations that confer greater virulence or antiviral resistance. This outbreak occurred along the US-Mexico border region and has not been associated with excessive demand of the health services. Based on virological data, in EW 13, among all samples tested, the percent positivity for influenza viruses was 17%, which represents an increase as compared to EW 12 (9%). The predominant circulating respiratory virus has been influenza A/H1N1 2009 in the last 3 EWs, followed by influenza B.
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