The veterinary authority sent Follow Up Report No. 1 dated 8 July to the World Organisation for Animal Health (OIE).
It identifies the sub-type of the influenza A virus as H7N9
The report adds that the USDA Animal Plant Health Inspection Service (APHIS) and the Minnesota Bureau of Animal Health are continuing the comprehensive epidemiological investigation of this event.
Epidemiological summary of the event as of 6 July 2011:
• Due to high temperatures in the area, with a heat index value of well above 37.8°Celsius (100° Fahrenheit), the turkey flock suffered a heat-related death loss of 2,500 turkeys. Samples were submitted to the University of Minnesota Veterinary Diagnostic Laboratory, and gross findings were consistent with death due to heat stress. The death loss was not related to avian influenza.
• Samples were drawn on 6 July 2011 for retesting of the flock for avian influenza. Results are pending.
• Re-sampling of any flocks within the 3 mile (5 km) surveillance zone is due to be accomplished during this week.
Aporte: Andrea Cuellar