California - Low pathogenic avian influenza H7N3 (poultry), Merced County, Merced (OIE, 03-17-2015)

[Pathfinder]

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

Information received on 17/03/2015 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 09/03/2015 Date of pre-confirmation of the event 10/03/2015 Report date 17/03/2015 Date submitted to OIE 17/03/2015 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 17/09/2014 Manifestation of disease Sub-clinical infection Causal agent Low pathogenic avian influenza virus Serotype H7N3 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (1)

Outbreak 1 Merced County, Merced, CALIFORNIA Date of start of the outbreak 09/03/2015 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 61000 Affected population An 18-week-old commercial turkey flock.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 61000 ** 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 The USDA Animal Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting a comprehensive epidemiological investigation of this event. Epidemiological summary of the event as of 17 March 2015: ? A commercial tom turkey flock exhibited coughing with a slight increase in mortality. Samples were submitted for laboratory testing and were confirmed positive for influenza A virus (IAV) H7N3 LPAI. ? North American H7N3 LPAI based upon partial HA and NA sequence obtained directly from swab specimen; virus isolation pending. ? The infected premises was placed under quarantine following preliminary findings and an epidemiological investigation was initiated. ? Follow-up surveillance and testing on 10 epidemiologically associated farms was negative for IAV. The epidemiological investigation and response to the event are continuing.

Control measures Measures applied Quarantine Movement control inside the country Zoning Vaccination prohibited No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result California Animal Health and Food Safety (CAHFS) Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 10/03/2015 Positive California Animal Health and Food Safety (CAHFS) Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 16/03/2015 Negative National Veterinary Services Laboratories (NVSL) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 12/03/2015 Positive National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus isolation Pending National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus sequencing 12/03/2015 Positive

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=17371

[Pathfinder]

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

Information received on 24/03/2015 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 Follow-up report No. 1 Date of start of the event 09/03/2015 Date of pre-confirmation of the event 10/03/2015 Report date 24/03/2015 Date submitted to OIE 24/03/2015 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 17/09/2014 Manifestation of disease Sub-clinical infection Causal agent Low pathogenic avian influenza virus Serotype H7N3 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (17/03/2015) Follow-up report No. 1 (24/03/2015)

Outbreaks There are no new outbreaks in this report

Epidemiology Source of the outbreak(s) or origin of infection Unknown or inconclusive Epidemiological comments The USDA Animal Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting a comprehensive epidemiological investigation of this event. Epidemiological summary of the event as of 23 March 2015: ? Samples were confirmed positive for wild bird lineage North American H7N3 LPAI based upon full genome sequence obtained from virus isolate. ? All surveillance testing of commercial poultry farms located within a 10km control area has been negative for influenza A virus. ? Depopulation of the infected premises will begin this week. The epidemiological investigation and response to the event are continuing.

Control measures Measures applied Quarantine Movement control inside the country Zoning Vaccination prohibited No treatment of affected animals Measures to be applied Stamping out

Diagnostic test results Laboratory name and type Species Test Test date Result National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus isolation 14/03/2015 Positive National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus sequencing 18/03/2015 Positive

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?reportid=17413

[Pathfinder]

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

Information received on 01/04/2015 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 Follow-up report No. 2 Date of start of the event 09/03/2015 Date of pre-confirmation of the event 10/03/2015 Report date 01/04/2015 Date submitted to OIE 01/04/2015 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 17/09/2014 Manifestation of disease Sub-clinical infection Causal agent Low pathogenic avian influenza virus Serotype H7N3 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (17/03/2015) Follow-up report No. 1 (24/03/2015) Follow-up report No. 2 (01/04/2015)

Outbreaks There are no new outbreaks in this report

Epidemiology Source of the outbreak(s) or origin of infection Unknown or inconclusive Epidemiological comments The USDA Animal Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting a comprehensive epidemiological investigation of this event. Epidemiological summary of the event as of 31 March 2015: ? Samples were confirmed positive for wild bird lineage North American H7N3 LPAI based upon full genome sequence obtained from virus isolate. ? All surveillance testing of commercial poultry farms located within a 10km control area has been negative for influenza A virus. ? Depopulation of the infected premises is in progress. The epidemiological investigation and response to the event are continuing.

Control measures Measures applied Stamping out Quarantine Movement control inside the country Zoning Vaccination prohibited No treatment of affected animals Measures to be applied No other measures

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=17457