The Florida Department of Health (FDOH) uses many different surveillance systems to measure
influenza activity. A summary of all these systems can be found on page 11.
National:
· According to CDC, influenza activity is increasing nationwide and is most elevated in the eastern
half of the country. Nationwide, influenza A H3N2 is the most commonly detected influenza
subtype.
· There were no new cases of variant H3N2 influenza A (H3N2v) reported in week 2, 2013. No
cases of H3N2v have been reported in Florida. More information on H3N2v is at: http://
www.cdc.gov/flu/swineflu/influenza-vari ... -h3n2v.htmState:
· Influenza-like illness (ILI) activity is elevated statewide.
· Currently, influenza and ILI activity is elevated in all regions of Florida.
· Central, and South Florida regions are showing higher than expected ILI activity in emergency
department (ED) visits for ILI, as monitored through ESSENCE-FL. ED visits for ILI declined
in the Panhandle counties in week 2.
· Twenty-four counties across all regions of Florida report moderate influenza activity in week 2,
2013. Forty-five counties report increasing influenza activity
· Because of the statewide reports of elevated influenza and ILI activity, FDOH is
reporting Widespread influenza activity to CDC for week 2, 2013.
· The activity level refers to the geographic spread of influenza, not its severity or intensity.
· Influenza A is now the most common flu type in Florida this season; this is a change from
previous weeks, when influenza B was more common.
· The Bureau of Public Health Laboratories (BPHL) tests select influenza surveillance
specimens, such as those from outbreak investigations and sentinel healthcare providers.
· Of the tests that have been influenza positive in the past five weeks, most have been positive
for influenza A H3; the rest have been influenza B, with the exception of five 2009 H1N1
influenza A specimens. All three of these are seasonal subtypes of influenza.
· This is a change from previous weeks, when influenza B was more common.
· In week 2, BPHL tested 107 specimens. Sixty-eight tested positive: seven for influenza B,
50 for influenza A H3, nine for influenza A (not yet subtyped) and two influenza A 2009
H1N1.
· Of the 31 ILI outbreaks reported this season, nineteen had confirmed influenza A infections,
four had confirmed influenza B infections, and two had both influenza A and B infections.
· There were eleven influenza and ILI outbreaks reported in week 2, 2013.
· In week 2, influenza and ILI outbreaks were reported in Hillsborough, Miami-Dade, Monroe
and Orange counties. More information can be found on page 10.
· One pediatric influenza-associated mortality was reported in week 2, 2013.
· This is the third pediatric influenza-associated mortality reported in the 2012-2013 season.
http://www.doh.state.fl.us/disease_ctrl ... 2-2013.pdf