US - 1 new outbreak of low pathogenic avian influenza H7N1 in commercial broiler breeder flock in farm, Hopkins county, Texas (OIE, March 9, 2018)

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[TD="width: *, align: left"] Low pathogenic avian influenza (poultry),
United States of America
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[TD="class: topbigtabletitle27"]Information received on 09/03/2018 from Dr John Clifford, Official Delegate, Chief Trade Advisor, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America[/TD]
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[TD] Summary
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[TD="class: filtrer_th, width: 10%"]Report type[/TD]
[TD="width: 30%"]Immediate notification[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]06/03/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]08/03/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Report date[/TD]
[TD="width: 30%"]09/03/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]09/03/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]Recurrence of a listed disease[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of previous occurrence[/TD]
[TD="width: 30%"]2017[/TD]
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[TD="class: filtrer_th, width: 10%"]Manifestation of disease[/TD]
[TD="width: 30%"]Clinical disease[/TD]
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[TD="class: filtrer_th, width: 10%"]Causal agent[/TD]
[TD="width: 30%"]Low pathogenic avian influenza virus[/TD]
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[TD="class: filtrer_th, width: 10%"]Serotype[/TD]
[TD="width: 30%"]H7N1[/TD]
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[TD="class: filtrer_th, width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Laboratory (basic), Laboratory (advanced)[/TD]
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[TD="class: filtrer_th, width: 10%"]This event pertains to[/TD]
[TD="width: 30%"]a defined zone within the country[/TD]
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[TD] New outbreaks (1)
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[TD="class: filtrer_th ta_left, align: left"]Outbreak 1[/TD]
[TD="class: filtrer_th ta_left"]Hopkins county, Hopkins, TEXAS[/TD]
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[TD="class: filtrer_th ta_left"]Date of start of the outbreak[/TD]
[TD]06/03/2018[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak status[/TD]
[TD]Continuing (or date resolved not provided)[/TD]
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[TD="class: filtrer_th ta_left"]Epidemiological unit[/TD]
[TD]Farm[/TD]
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[TD="class: filtrer_th ta_left"]Affected animals[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Killed and disposed of[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]24091[/TD]
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[TD="class: filtrer_th ta_left"]Affected population[/TD]
[TD]Commercial broiler breeder flock[/TD]
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[TD="class: filtrer_th ta_left, align: left"]Summary of outbreaks[/TD]
[TD="class: filtrer_th ta_left"]Total outbreaks: 1[/TD]
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[TD="class: filtrer_th ta_left"]Total animals affected[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Killed and disposed of[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]24091[/TD]
[TD="class: ta_right"]**[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak statistics[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Apparent morbidity rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent mortality rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent case fatality rate[/TD]
[TD="class: filtrer_th ta_center last"]Proportion susceptible animals lost*[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
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[TD="class: filtrer_th ta_left, colspan: 2"]*Removed from the susceptible population through death, destruction and/or slaughter[/TD]
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[TD="class: filtrer_th ta_left, colspan: 2"]**Not calculated because of missing information[/TD]
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[TD] Epidemiology
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[TD="class: filtrer_th ta_left"]Source of the outbreak(s) or origin of infection[/TD]
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• Unknown or inconclusive

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[TD="class: filtrer_th ta_left"]Epidemiological comments[/TD]
[TD]As part of routine, pre-slaughter testing and surveillance for H5/H7 avian influenza, H7N1 low pathogenic avian influenza (LPAI) was detected in a commercial broiler breeder flock based upon H7 PCR and antibody to H7 and N1. Partial HA sequencing determined the H7 to be a low pathogenic virus of North American wild bird lineage. Further characterization is pending virus recovery. The flock exhibited a slight increase in mortality and a decrease in egg production. Depopulation of the premises is underway. The USDA Animal Plant Health Inspection Service (APHIS) and the Texas Animal Health Commission are conducting a comprehensive epidemiological investigation of this incident and have implemented enhanced surveillance and testing within 10km of this finding.[/TD]
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[TD] Control measures
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[TD="class: filtrer_th ta_left"]Measures applied[/TD]
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• Movement control inside the country
• Surveillance outside containment and/or protection zone
• Surveillance within containment and/or protection zone
• Quarantine
• Zoning
• Vaccination prohibited
• No treatment of affected animals

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[TD="class: filtrer_th ta_left"]Measures to be applied[/TD]
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• Disinfection

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[TD] Diagnostic test results
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[TD="class: filtrer_th ta_left"]Laboratory name and type[/TD]
[TD="class: filtrer_th ta_left"]Species[/TD]
[TD="class: filtrer_th ta_left"]Test[/TD]
[TD="class: filtrer_th ta_left"]Test date[/TD]
[TD="class: filtrer_th ta_left last"]Result[/TD]
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[TD="class: filtrer"]Texas A&M Veterinary Medical Diagnostic Laboratory (Local laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]enzyme-linked immunosorbent assay (ELISA)[/TD]
[TD="class: filtrer"]07/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]Texas A&M Veterinary Medical Diagnostic Laboratory (Local laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)[/TD]
[TD="class: filtrer"]07/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Veterinary Services Laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]enzyme-linked immunosorbent assay (ELISA)[/TD]
[TD="class: filtrer"]07/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Veterinary Services Laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]haemagglutination inhibition test (HIT)[/TD]
[TD="class: filtrer"]07/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Veterinary Services Laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)[/TD]
[TD="class: filtrer"]08/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Veterinary Services Laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]virus isolation[/TD]
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[TD="class: filtrer cb-centree last"]Pending[/TD]
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[TD] Future Reporting
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[TD="class: filtrer"]The event is continuing. Weekly follow-up reports will be submitted.[/TD]
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http://www.oie.int/wahis_2/public/w...?page_refer=MapFullEventReport&reportid=26131