Title: Highly pathogenic #avian #influenza #H7N9, #USA [a #poultry #outbreak, #Tennessee].
Subject: Avian Influenza, H7N9 subtype, poultry epizootics in the US.
Source: OIE, full page: (LINK).
Code: [ ]
Highly pathogenic avian influenza H7N9, United States of America
Information received on 17/03/2017 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
- Report type Follow-up report No. 2
- Date of start of the event 01/03/2017
- Date of confirmation of the event 04/03/2017
- Report date 17/03/2017
- Date submitted to OIE 17/03/2017
- Reason for notification Reoccurrence of a listed disease
- Date of previous occurrence 2016
- Manifestation of disease Clinical disease
- Causal agent Highly pathogenic avian influenza virus
- Serotype H7N9
- Nature of diagnosis Laboratory (advanced)
- This event pertains to a defined zone within the country
- Summary of outbreaks
- Total outbreaks: 1
- Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
- Birds - 55000 - ** - 344 - 30000 - 0
- Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
- Birds - ** - 0.63% - ** - 55.17%
- *Removed from the susceptible population through death, destruction and/or slaughter
- **Not calculated because of missing information
- Source of the outbreak(s) or origin of infection
- Unknown or inconclusive
- Epidemiological comments
- The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with the Tennessee Department of Agriculture, are continuing to respond to the identification of a highly pathogenic avian influenza (HPAI) H7N9 in commercial breeder flocks in Lincoln County, Tennessee.
- This H7N9 strain is of North American wild bird lineage.
- This is NOT the same as the China H7N9 lineage that has impacted poultry and infected humans in Asia.
- Although the subtypes are the same (H7N9) the virus detected in the United States is a very different virus, genetically distinct from the China H7N9 lineage.
- A comprehensive epidemiological investigation in the surrounding area is continuing and enhanced surveillance and testing is ongoing.
- Surveillance samples from a premises located within the infection zone (3 kilometers) confirmed a second outbreak of the same North American strain of avian influenza HPAI H7N9.
- State officials have quarantined the affected premises and implemented movement controls.
- Depopulation of birds on the second premises has begun.
Keywords: OIE; Updates; Avian Influenza; H7N9 ; Poultry; USA; Tennessee.