Flu Scan for Feb 19, 2016

Jump in US flu activity
H7N9 cases in China
Avian flu outbreaks

US flu levels show steady rise

Flu activity indicators in the United States showed a solid rise last week, with notable increases in the percentage of respiratory specimens positive for flu and the proportion of doctor visits for influenzalike illness (ILI), the US Centers for Disease Control and Prevention (CDC) said today.

The percentage of flu-positive respiratory tests rose from 9.1% to 12% last week, its highest point so far this season, while the percentage of clinic visits for flu increased from 2.4% to 3.1%. Last week's activity was still dominated by the 2009 H1N1 virus, which is known to cause serious disease even in previously healthy younger and middle-aged adults.

Nine of the CDC's 10 regions are above their specific baselines for flu-related clinic visits. Puerto Rico, Arizona, and Oklahoma reported high ILI activity. Widespread flu activity was reported from Puerto Rico and 12 states, . most in the southwest and northeast regions. This represents a rise from the week before, when such activity was present in the territory and seven states.

Surveillance showed a rise in the cumulative number of hospitalizations, which is now at 4.1 per 100,000 population, up from 3.2 per 100,000 last week.

Two more pediatric flu deaths were reported, lifting the season's total to 13. Overall deaths from pneumonia and flu, a marker that usually lags others, were at and below seasonal baselines in the two systems the CDC uses to monitor those patterns.
Feb 19 CDC FluView report


China reports 2 H7N9 cases

Chinese provincial and Hong Kong health officials yesterday reported two more H7N9 avian flu infections in adults from China's mainland, according to translated updates posted on FluTrackers, an infectious disease news message board.

Both case-patients are 57-year-old men who had contact with poultry before illness onset. The first patient is from China's eastern Shandong province and is hospitalized in critical condition in Yantai.

The second patient is from the town of Shaoxing in Zhejiang province; he is hospitalized in serious condition. Hong Kong health officials said his infection is the first H7N9 case in Zhejiang's Xinchang county.

The new cases are part of a fourth wave of H7N9 activity in China, in which 55 cases have been reported so far. They lift the overall global total from the disease to 740, according to a case list maintained by FluTrackers.
Feb 18 FluTrackers post on Shandong case
Feb 18 FluTrackers post on Zhejiang case


France and Hong Kong detect HPAI; Indiana will lift H5N8 control area

France and Hong Kong have reported recent detections of the highly pathogenic avian influenza (HPAI) strains H5N1 and H5N6, respectively, while Indiana officials prepare to lift the control and surveillance areas around farms that reported H5N8 detections in January.

French agricultural officials reported an outbreak of H5N1 to the World Organization for Animal Health (OIE) yesterday. H5N1 was detected as part of routine surveillance on a farm in the town of Creysse, located in France's south central Lot region. All 7,650 birds on the farm were destroyed to prevent spread of the infection.

Hong Kong health officials reported today that H5N6 was detected in a chicken carcass found at a beach in the Lung Kwu Tan region of Hong Kong's western Tuen Mun district. Officials said that no poultry farms are located in the region and are conducting surveillance for backyard flocks, which are banned in Hong Kong.

In related news, the Indiana State Board of Animal Health (BOAH) announced yesterday that it will lift its 10-kilometer control area and 10-kilometer surveillance area around farms affected by January outbreaks of HPAI and low-pathogenic H5N8, provided no new positive detections occur in the meantime.

The January detections resulted in the destruction of 258,045 turkeys and 156,178 chickens on 10 farms in Indiana's Dubois county, the BOAH said.

Ongoing testing at Purdue University's Indiana Animal Disease Diagnostic Laboratory has revealed no new positive H5N8 results since Jan 16. The lab has tested about 2,100 samples since the outbreak began.

Affected counties in the control and surveillance areas include Dubois, Crawford, Daviess, Martin, and Orange. Permits from the BOAH must be obtained for all poultry movements within these regions until the control and surveillance areas are lifted.
Feb 18 OIE report
Feb 19 Hong Kong Government Information Center
press release
Feb 18 Indiana BOAH
press release
Jan 15 CIDRAP News story on Indiana H5N8 outbreak

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