Rabbit haemorrhagic disease,
Mexico

Information received on 10/04/2020 from Dr. Gay Gutiérrez Juan, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA), Secretaría de Agricultura y Desarrollo Rural (SADER), Ciudad de Mexico, Mexico

Summary

Report type	Immediate notification
Date of start of the event	03/04/2020
Date of confirmation of the event	08/04/2020
Report date	09/04/2020
Date submitted to OIE	10/04/2020
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	1991
Manifestation of disease	Clinical disease
Causal agent	Rabbit haemorrhagic disease virus
Serotype	Not typed
Nature of diagnosis	Clinical, Laboratory (advanced)
This event pertains to	a defined zone within the country
Related reports	Immediate notification (09/04/2020) Follow-up report No. 1 (22/04/2020) Follow-up report No. 2 (04/05/2020) Follow-up report No. 3 (15/05/2020) Follow-up report No. 4 (25/05/2020) Follow-up report No. 5 (29/05/2020) Follow-up report No. 6 (09/06/2020) Follow-up report No. 7 (17/06/2020) Follow-up report No. 8 (24/06/2020) Follow-up report No. 9 (01/07/2020) Follow-up report No. 10 (14/07/2020) Follow-up report No. 11 (22/07/2020) Follow-up report No. 12 (29/07/2020) Follow-up report No. 13 (04/08/2020) Follow-up report No. 14 (18/08/2020) Follow-up report No. 15 (26/08/2020) Follow-up report No. 16 (18/09/2020) Follow-up report No. 17 (25/09/2020) Follow-up report No. 18 (05/10/2020) Follow-up report No. 19 (14/10/2020) Follow-up report No. 20 (28/10/2020) Follow-up report No. 21 (17/11/2020) Follow-up report No. 22 (09/12/2020) Follow-up report No. 23 (15/01/2021)

New outbreaks (1)

Outbreak 1

Nuevo Casa Grandes, Chihuahua

Date of start of the outbreak

03/04/2020

Outbreak status

Resolved (09/04/2020)

Epidemiological unit

Backyard

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Rabbits	30	13	11	19	0

Affected population

A backyard with 30 adult animals for reproduction/breeding detected following sudden deaths and clinical signs suggesting the disease (dyspnea, nasal bleeding).

Summary of outbreaks

Total outbreaks: 1

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Rabbits	30	13	11	19	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Rabbits	43.33%	36.67%	84.62%	100.00%

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

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

The affected backyard has been depopulated and cleaning and disinfection are on-going. Following the epidemiological investigation, two in-contact premises were identified, but no evidence of the disease was found; however, as a precautionary measure, they will be depopulated. The zone around the outbreak has been expanded in order to further detect other cases. It is important to emphasize that this is not a rabbit breeding zone at national level and the population is very limited.

Control measures

Measures applied	Surveillance within containment and/or protection zone Quarantine Official disposal of carcasses, by-products and waste Stamping out Disinfection Vaccination prohibited No treatment of affected animals
Measures to be applied	Surveillance outside containment and/or protection zone

Diagnostic test results

Laboratory name and type	Species	Test	Test date	Result
SENASICA Biosafety Laboratory Level 3 (National laboratory)	Rabbits	haemagglutination (HA) test	08/04/2020	Positive
SENASICA Biosafety Laboratory Level 3 (National laboratory)	Rabbits	reverse transcription - polymerase chain reaction (RT-PCR)	08/04/2020	Positive

Future Reporting

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

Map of outbreak locations