Rabbit haemorrhagic disease,
United States of America

Information received on 06/03/2020 from Dr Mark Davidson, Associate Administrator, USDA-APHIS, United States Department of Agriculture, Washington, United States of America

Summary

Report type	Follow-up report No. 6
Date of start of the event	08/07/2019
Date of confirmation of the event	17/07/2019
Report date	06/03/2020
Date submitted to OIE	06/03/2020
Date event resolved	03/07/2020
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	16/04/2019
Manifestation of disease	Clinical disease
Causal agent	Rabbit haemorrhagic disease virus
Serotype	RHDV2
Nature of diagnosis	Laboratory (advanced)
This event pertains to	the whole country
Related reports	Immediate notification (19/07/2019) Follow-up report No. 1 (08/08/2019) Follow-up report No. 2 (16/08/2019) Follow-up report No. 3 (30/08/2019) Follow-up report No. 4 (03/12/2019) Follow-up report No. 5 (07/01/2020) Follow-up report No. 6 (06/03/2020) Follow-up report No. 7 (13/03/2020) Follow-up report No. 8 (27/03/2020) Follow-up report No. 9 (06/04/2020) Follow-up report No. 10 (13/04/2020) Follow-up report No. 11 (20/04/2020) Follow-up report No. 12 (27/04/2020) Follow-up report No. 13 (05/05/2020) Follow-up report No. 14 (13/05/2020) Follow-up report No. 15 (19/05/2020) Follow-up report No. 16 (27/05/2020) Follow-up report No. 17 (01/06/2020) Follow-up report No. 18 (09/06/2020) Follow-up report No. 19 (17/06/2020) Follow-up report No. 20 (23/06/2020) Follow-up report No. 21 (29/06/2020) Follow-up report No. 22 (02/07/2020)

New outbreaks (1)

Outbreak 1

New York, New York County, New York

Date of start of the outbreak

18/02/2020

Outbreak status

Resolved (18/04/2020)

Epidemiological unit

Other

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Rabbits		13	13	0	0

Affected population

Non-commercial rabbits (Oryctolagus cuniculus) housed at an avian and exotics veterinary clinic as patients, boarders and rescues

Summary of outbreaks

Total outbreaks: 1

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Rabbits		13	13	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Rabbits	**	**	100.00%	**

*Removed from the susceptible population through death, destruction and/or slaughter

**Not calculated because of missing information

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

Update March 6, 2020: RHDV2 confirmed in rabbits (Oryctolagus cuniculus) associated with a New York veterinary clinic. The New York State Veterinarian�s Office and the United States Department of Agriculture (USDA), Animal and Plant Health Inspection Services (APHIS) are conducting epidemiological investigations of this outbreak. Disease tracebacks and testing are ongoing. Currently, there are no known links to outbreak events in Washington. Vaccination clinic held in Clallam County, Washington.

Control measures

Measures applied	Disinfection Quarantine Traceability Surveillance within containment and/or protection zone Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type	Species	Test	Test date	Result
National Veterinary Services Laboratories (National laboratory)	Rabbits	antigen (Ag) detection ELISA	03/03/2020	Positive
National Veterinary Services Laboratories (National laboratory)	Rabbits	reverse transcription - polymerase chain reaction (RT-PCR)	03/03/2020	Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations