Newcastle disease,
United States of America
Information received on 27/09/2018 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
Report type Immediate notification
Date of start of the event 19/09/2018
Date of confirmation of the event 25/09/2018
Report date 26/09/2018
Date submitted to OIE 27/09/2018
Date event resolved 23/01/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 16/09/2003
Manifestation of disease Clinical disease
Causal agent Newcastle disease virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (26/09/2018)
Follow-up report No. 1 (16/12/2018)
Follow-up report No. 2 (08/01/2019)
Follow-up report No. 3 (05/02/2019)
Follow-up report No. 4 (27/02/2019)
Follow-up report No. 5 (08/03/2019)
Follow-up report No. 6 (15/03/2019)
Follow-up report No. 7 (22/03/2019)
Follow-up report No. 8 (17/05/2019)
Follow-up report No. 9 (15/08/2019)
Follow-up report No. 10 (03/09/2019)
Follow-up report No. 11 (12/09/2019)
Follow-up report No. 12 (25/11/2019)
Follow-up report No. 13 (04/12/2019)
Follow-up report No. 14 (24/02/2020)
New outbreaks (1)
Outbreak 1 Los Angeles County, Los Angeles, California
Date of start of the outbreak 19/09/2018
Outbreak status Resolved (06/10/2018)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 170 12 6 152
Affected population Chickens at a live bird market
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 170 12 6 152
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 7.06% 3.53% 50.00% **
*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 As part of enhanced surveillance for virulent Newcastle disease virus in exhibition birds, the virus was detected in a live bird market. As a result, the USDA Animal and Plant Health Inspection Services (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting a comprehensive epidemiological investigation of the event with enhanced surveillance. State officials have quarantined the affected premises and implemented movement controls. The market has been depopulated and cleaned and disinfected. Live bird markets in the area have been ordered to close for a day and perform cleaning and disinfection with environmental sampling. Note from the WAHIAD: The date of last occurrence 16/09/2003 concerns domestic birds; however, the last detection in wild birds was reported in 2012.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Stamping out
  • Zoning
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • 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 & Food Safety Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 21/09/2018 Positive
National Veterinary Services Laboratory (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 25/09/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations