There were 5 positive tests for influenza A and 4 positive tests for influenza B reported by hospital and referral laboratories. Only PCR, immunofluorescence and culture results are counted in these totals.
At the Office of Laboratory Services there were 2 positive tests for influenza A, 0% (0) were influenza A 2009 (H1N1) and 100% (2) were positive for influenza A, H3. There were no positive tests for influenza B.
There were two outbreaks with influenza-like or confirmed influenza activity in nursing homes.
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Synopsis:
During week 13 (March 27-April 2, 2011), influenza activity in the United States
- The proportion of deaths attributed to pneumonia and influenza (P&I) has been at or above the epidemic threshold for 10 consecutive weeks.
- Two influenza-associated pediatric deaths were reported, bringing the season total to 91. One of these deaths was associated with 2009 influenza A (H1N1) virus, and one was associated with an influenza A virus for which the subtype was not determined.
- The geographic spread of influenza in three states was reported as widespread; 17 states reported regional influenza activity; the
District of Columbia and 19 states reported local influenza activity; Puerto Rico and 11 states reported sporadic influenza activity;Guam reported no influenza activity, and the U.S. Virgin Islands did not report.
No. of specimens tested | 3,616 |
No. of positive specimens (%) | 399 (11.0%) |
Positive specimens by type/subtype | |
Influenza A | 272 (68.2%) |
A (2009 H1N1) | 65 (23.9%) |
A (subtyping not performed) | 101 (37.1%) |
A (H3) | 106 (40.0%) |
Influenza B | 127 (31.8%) |
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