Infectious hypodermal and haematopoietic necrosis,
United States of America
Information received on 28/02/2020 from Dr Mark Davidson, Associate Administrator, USDA-APHIS, United States Department of Agriculture, Washington, United States of America
Report type Follow-up report No. 2
Date of start of the event 21/03/2019
Date of confirmation of the event 22/10/2019
Report date 28/02/2020
Date submitted to OIE 28/02/2020
Date event resolved 01/04/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2019
Manifestation of disease Clinical disease
Causal agent Infectious hypodermal and haematopoietic necrosis virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (20/11/2019)
Follow-up report No. 1 (13/12/2019)
Follow-up report No. 2 (28/02/2020)
Follow-up report No. 3 (06/04/2020)
Outbreaks There are no new outbreaks in this report
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
Epidemiological comments The shrimp at the California premises were depopulated and the facility was decommissioned. No live shrimp were moved from the facility.
Control measures
Measures applied
  • Quarantine
  • Stamping out
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • 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.