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Mexico - 2 new outbreaks of highly pathogenic avian influenza H7N3 in backyard birds, Guanajuato, Queretaro (OIE, March 9, 2018)

Pathfinder

Pathfinder

Editor, Senior Moderator
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[TD="width: *, align: left"] Highly pathogenic avian influenza,
Mexico
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[TD="width: 1%, align: right"] [/TD]
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[TD] [TABLE="class: TableChoisir, border: 0, cellpadding: 0, cellspacing: 0"]
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[TD="class: topbigtabletitle27"]Information received on 10/03/2018 from MVZ Joaqu?n Braulio Delgadillo ?lvarez, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA) Secretar?a de Agricultura, Ganader?a, Desarrollo Rural, Pesca y Alimentaci?n, Ministerio de Agricultura, Ganader?a, Desarrollo Rural, Pesca y Alimentaci?n, M?xico, Mexico[/TD]
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[/TD]
[/TR]
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[TD] Summary
[TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th, width: 10%"]Report type[/TD]
[TD="width: 30%"]Immediate notification[/TD]
[/TR]
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[TD="class: filtrer_th, width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]12/02/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]03/03/2018[/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%"]10/03/2018[/TD]
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[TD="class: filtrer_th, width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]Recurrence of a listed disease[/TD]
[/TR]
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[TD="class: filtrer_th, width: 10%"]Date of previous occurrence[/TD]
[TD="width: 30%"]31/05/2017[/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%"]Highly pathogenic avian influenza virus[/TD]
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[TD="class: filtrer_th, width: 10%"]Serotype[/TD]
[TD="width: 30%"]H7N3[/TD]
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[TD="class: filtrer_th, width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Clinical, 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 (2)
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[TD] [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left, align: left"]Outbreak 1[/TD]
[TD="class: filtrer_th ta_left"]San Felipe, San Felipe, GUANAJUATO[/TD]
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[TD="class: filtrer_th ta_left"]Date of start of the outbreak[/TD]
[TD]12/02/2018[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak status[/TD]
[TD]Resolved (20/02/2018)[/TD]
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[TD="class: filtrer_th ta_left"]Epidemiological unit[/TD]
[TD]Backyard[/TD]
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[TD="class: filtrer_th ta_left"]Affected animals[/TD]
[TD] [TABLE="class: TableFoyers, width: 663"]
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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]
[/TR]
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[TD]Birds[/TD]
[TD="class: ta_right"]1900[/TD]
[TD="class: ta_right"]1380[/TD]
[TD="class: ta_right"]1380[/TD]
[TD="class: ta_right"]520[/TD]
[TD="class: ta_right"]0[/TD]
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[/TD]
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[TD="class: filtrer_th ta_left"]Affected population[/TD]
[TD]Approximately-80-weeks-old Rhode Island Red chickens and white chickens in a rural farm.[/TD]
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[/TD]
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[TD] [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left, align: left"]Outbreak 2[/TD]
[TD="class: filtrer_th ta_left"]Cadereyta de Montes, Cadereyta de Montes, QUERETARO[/TD]
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[TD="class: filtrer_th ta_left"]Date of start of the outbreak[/TD]
[TD]22/02/2018[/TD]
[/TR]
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[TD="class: filtrer_th ta_left"]Outbreak status[/TD]
[TD]Resolved (23/02/2018)[/TD]
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[TD="class: filtrer_th ta_left"]Epidemiological unit[/TD]
[TD]Backyard[/TD]
[/TR]
[TR]
[TD="class: filtrer_th ta_left"]Affected animals[/TD]
[TD] [TABLE="class: TableFoyers, width: 646"]
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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]
[/TR]
[TR]
[TD]Birds[/TD]
[TD="class: ta_right"]26[/TD]
[TD="class: ta_right"]7[/TD]
[TD="class: ta_right"]7[/TD]
[TD="class: ta_right"]19[/TD]
[TD="class: ta_right"]0[/TD]
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[/TD]
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[TD="class: filtrer_th ta_left"]Affected population[/TD]
[TD]Backyard birds with clinical signs: conjunctivitis, watery diarrhea and sudden death.[/TD]
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[/TD]
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[TD] [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left, align: left"]Summary of outbreaks[/TD]
[TD="class: filtrer_th ta_left"]Total outbreaks: 2[/TD]
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[TD="class: filtrer_th ta_left"]Total animals affected[/TD]
[TD] [TABLE="class: TableFoyers, width: 745"]
[TR]
[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]
[/TR]
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[TD]Birds[/TD]
[TD="class: ta_right"]1926[/TD]
[TD="class: ta_right"]1387[/TD]
[TD="class: ta_right"]1387[/TD]
[TD="class: ta_right"]539[/TD]
[TD="class: ta_right"]0[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak statistics[/TD]
[TD] [TABLE="class: TableFoyers, width: 745"]
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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"]72.01%[/TD]
[TD="class: ta_right"]72.01%[/TD]
[TD="class: ta_right"]100.00%[/TD]
[TD="class: ta_right"]100.00%[/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] 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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  • Introduction of new live animals
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[TD="class: filtrer_th ta_left"]Epidemiological comments[/TD]
[TD]A farm was detected in Guanajuato within the framework of the permanent National program for active epidemiological surveillance. It initially had 1,400 Rhodes Island Red chickens, before the introduction of 500 white chickens towards the end of the laying phase, supposedly coming from a farm in Jalisco where vaccination is applied. This was verified through serology on 30 sera with two titers of 1:256, four titers of 1:512 and 24 titers of 1:1024. This introduction is considered to be the source of infection of the susceptible birds. Isolation in Quer?taro was obtained after the reporting by an authorized laboratory, which provided the official laboratory with the samples. As difficulties were faced during typing of the virus, several diagnostic assays were performed until confirmation. Isolated viruses in Guanajuato and Quer?taro presented an IVIP of 2.84 and 2.86, respectively. In both cases, measures to control the epidemic were applied, including quarantine of the premises and killing of the birds. Pre-emptively, a focal zone and a perifocal zone of three and ten kilometers respectively were implemented, where the absence of the disease has been verified. The National veterinary services will keep the epidemiological surveillance going and inform the OIE about any evolution.[/TD]
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[TD] [/TD]
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[TD] Control measures
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[TD="class: filtrer_th ta_left"]Measures applied[/TD]
[TD]
  • Movement control inside the country
  • Screening
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Zoning
  • Disinfection
  • Vaccination prohibited
  • No treatment of affected animals
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[TD="class: filtrer_th ta_left"]Measures to be applied[/TD]
[TD]
  • No other measures
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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"]SENASICA level-3 biosecurity laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]haemagglutination inhibition test (HIT)[/TD]
[TD="class: filtrer"]18/02/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
[/TR]
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[TD="class: filtrer"]SENASICA level-3 biosecurity laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]intravenous pathogenicity index (IVPI) test[/TD]
[TD="class: filtrer"]19/02/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]SENASICA level-3 biosecurity laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]neuraminidase inhibition assay[/TD]
[TD="class: filtrer"]03/03/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
[/TR]
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[TD="class: filtrer"]SENASICA level-3 biosecurity laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]virus isolation[/TD]
[TD="class: filtrer"]19/02/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
[/TR]
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[TD="class: filtrer"]SENASICA level-3 biosecurity laboratory (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]virus sequencing[/TD]
[TD="class: filtrer"]23/02/2018[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD] Future Reporting
[TABLE="class: TableFoyers, width: 917"]
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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=26143
 
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