LPAI H7N8 Dubois County Indiana - OIE

[Admin]

OIE report on Dubois County Indiana LPAI H7N8 outbreak.

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=19561

[Admin]

Low pathogenic avian influenza (poultry), United States of America

Information received on 19/01/2016 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

Summary Report type Immediate notification Date of start of the event 16/01/2016 Date of confirmation of the event 16/01/2016 Report date 19/01/2016 Date submitted to OIE 19/01/2016 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 2015 Manifestation of disease Sub-clinical infection Causal agent Low pathogenic avian influenza virus Serotype H7N8 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (8)

Outbreak 1 Dubois County 2, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 21000     21000 0 Affected population A commercial turkey flock.

Outbreak 2 Dubois County 8, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 37000     37000 0 Affected population A commercial turkey flock.

Outbreak 3 Dubois County 9, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 16700     16700 0 Affected population A commercial turkey flock.

Outbreak 4 Dubois County 3, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 29000     29000 0 Affected population A commercial turkey flock.

Outbreak 5 Dubois County 4, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 12000     12000 0 Affected population A commercial turkey flock.

Outbreak 6 Dubois County 7, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 11705         Affected population A commercial turkey flock.

Outbreak 7 Dubois County 5, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 22000     22000 0 Affected population A commercial turkey flock.

Outbreak 8 Dubois County 10, Dubois, INDIANA Date of start of the outbreak 16/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 6000     6000 0 Affected population A commercial turkey flock.

Summary of outbreaks Total outbreaks: 8 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 155405 **   143700 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** ** ** ** *Removed from the susceptible population through death, destruction and/or slaughter **Not calculated because of missing information

Epidemiology Source of the outbreak(s) or origin of infection Unknown or inconclusive Epidemiological comments As part of existing avian influenza response plans, the USDA Animal and Plant Health Inspection Service (APHIS) in conjunction with the Indiana State Board of Animal Health, are conducting a comprehensive epidemiological investigation and enhanced surveillance and testing in the Indiana HPAI H7N8 control area. Enhanced surveillance in the control area for the HPAI H7N8 Indiana event identified low pathogenic avian influenza (LPAI) H7N8 in 8 turkey flocks. The partial sequences of the LPAI and HPAI H7N8 viruses are nearly identical except for the HA gene insertion which imparts high pathogenicity to the HPAI virus. While the detection of AI in these additional flocks was of low pathogenicity, and the turkeys in these flocks were clinically healthy, this virus has a potential to mutate to HPAI, and, therefore, appropriate sanitary measures are being implemented to mitigate the risk. State officials have quarantined the affected premises and implemented movement controls. Depopulation of birds on the premises is under way.

Control measures Measures applied Movement control inside the country Quarantine Surveillance outside containment and/or protection zone Stamping out Surveillance within containment and/or protection zone Zoning Vaccination prohibited No treatment of affected animals Measures to be applied Disinfection / Disinfestation Official disposal of carcasses, by-products and waste

Diagnostic test results Laboratory name and type Species Test Test date Result National Veterinary Services Laboratories (NVSL) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 16/01/2016 Positive National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus isolation   Pending National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus sequencing 16/01/2016 Positive

Future Reporting The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations

[Admin]

http://www.oie.int/wahis_2/temp/reports/en_imm_0000019561_20160120_171828.pdf

Edited January 20, 2016 by Admin