Week 15 WV Flu activity remains Sporadic

West Virginia has reported influenza activity as “Sporadic” for MMWR week 15 ending Saturday, April 16, 2011.

 

There were 6 positive tests for influenza A and 3 positive test 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 4 positive tests for influenza A, 0% (0) were influenza A 2009 (H1N1) and 100% (4) were positive for influenza A, H3.  There were no positive tests for influenza B.

There was one outbreak of confirmed influenza activity in a nursing home.

Up to date information can be found at the website:

http://www.wvidep.org/tabid/1960/Default.aspx

CDC Synopsis:

During week 15 (April 10-16, 2011), influenza activity in the United States continued to decrease.

• The proportion of deaths attributed to pneumonia and influenza (P&I) has been at or above the epidemic threshold for 12 consecutive weeks.
• Four influenza-associated pediatric deaths were reported, bringing the season total to 95. One of these deaths was associated with 2009 influenza A (H1N1) virus and three deaths were associated with an influenza B virus.
• The geographic spread of influenza in five states was reported as regional; 20 states reported local influenza activity; the District of Columbia, Guam, Puerto Rico, and 24 states reported sporadic influenza activity, and the U.S. Virgin Islands and one state reported no influenza activity.

No. of specimens tested	2,972
No. of positive specimens (%)	201 (6.8%)
Positive specimens by type/subtype
Influenza A	127 (63.2%)
A (2009 H1N1)	17 (13.4%)
A (subtyping not performed)	31 (24.4%)
A (H3)	79 (62.2%)
Influenza B	74 (36.8%)

Week 14 WV Flu Activity Sporadic

West Virginia has reported influenza activity as “Sporadic” for MMWR week 14 ending Saturday, April 9, 2011.

There were 11 positive tests for influenza A and 1 positive test 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 12 positive tests for influenza A,33% (4) were influenza A 2009 (H1N1) and 67% (8) were positive for influenza A, H3.  There were two positive tests for influenza B.

There was one outbreak of confirmed influenza activity in a nursing home.

Up to date information can be found at the website:

http://www.wvidep.org/tabid/1960/Default.aspx

CDC Synopsis:

During week 14 (April 3-9, 2011), influenza activity in the United States continued to decrease.

• The proportion of deaths attributed to pneumonia and influenza (P&I) has been at or above the epidemic threshold for 11 consecutive weeks.
• One influenza-associated pediatric death was reported, bringing the season total to 91. This death was associated with an influenza B virus.
• The geographic spread of influenza in two states was reported as widespread; nine states reported regional influenza activity; the District of Columbia and 23 states reported local influenza activity; Guam and 16 states reported sporadic influenza activity; the U.S. Virgin Islands reported no influenza activity, and Puerto Rico did not report.

No. of specimens tested	4,234
No. of positive specimens (%)	387 (9.1%)
Positive specimens by type/subtype
Influenza A	242 (62.5%)
A (2009 H1N1)	68 (28.1%)
A (subtyping not performed)	74 (30.6%)
A (H3)	100 (41.3%)
Influenza B	145 (37.5%)

Week 13 Influenza Activity continues to Decrease

West Virginia has reported influenza activity as “Local” for MMWR week 13 ending Saturday, April 2, 2011. 

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.

Up to date information can be found at the website:

http://www.wvidep.org/tabid/1960/Default.aspx

Synopsis:

During week 13 (March 27-April 2, 2011), influenza activity in the United States continued to decrease.

• 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%)

Week 12 and WV Flu Activity on the Decrease

West Virginia has reported influenza activity as “Local” for MMWR week 12 ending Saturday, March 26, 2011. 

There were 39 positive tests for influenza A and 11 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 20 positive tests for influenza A, 30% (6) were influenza A 2009 (H1N1) and 70% (14) were positive for influenza A, H3.  There were two positive tests for influenza B.

There were two outbreaks with influenza-like or confirmed influenza activity in nursing homes and elementary school settings.

CDC Synopsis:

During week 12 (March 20-26, 2011), influenza activity in the United States decreased.

• The proportion of deaths attributed to pneumonia and influenza (P&I) has been at or above the epidemic threshold for the ninth consecutive week.
• Twelve influenza-associated pediatric deaths were reported, bringing the season total to 89. Four of these deaths were associated with influenza B viruses; four were associated with 2009 influenza A (H1N1) viruses; one was associated with influenza A (H3N2) virus, and three were associated with an influenza A virus for which the subtype was not determined.
• The geographic spread of influenza in 10 states was reported as widespread; 21 states reported regional influenza activity; the District of Columbia and 12 states reported local influenza activity, and Guam, Puerto Rico, the U.S. Virgin Islands and six states reported sporadic influenza activity.

No. of specimens tested	5,319
No. of positive specimens (%)	737 (13.9%)
Positive specimens by type/subtype
Influenza A	525 (71.2%)
A (2009 H1N1)	114 (21.7%)
A (subtyping not performed)	224 (42.7%)
A (H3)	187 (35.6%)
Influenza B	212 (28.8%)