06/01/2021
For rabbit owners. The latest from the state diagnostic lab regarding Rabbit Hemorrhagic Disease, the other epidemic of 2020-21. We do still have a few doses of the vaccine available if your rabbit hasn't received it yet.
Rabbit Hemorrhagic Disease Update
Rabbit hemorrhagic disease (RHD) caused by RHD virus 2 (RHDV2) continues to spread in Southern California. RHD is a serious and extremely
contagious viral disease of rabbits and other lagomorphs. Morbidity and
mortality rates are high in unvaccinated animals; in some groups of infected rabbits, most or all may die. The disease has been known to cause
dramatic declines in some wild rabbit populations. After the initial diagnosis in a black-tailed jackrabbit made by CAHFS in May 2020, the disease
is now considered endemic in Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, and
Ventura counties. In addition to detection of RHD in wild cottontail rabbits and jackrabbits, RHDV2
has been confirmed in domestic rabbits on 50 premises, including a detection in a feral domestic
rabbit. CDFA recommends that rabbit owners prevent contact with wild rabbits and jackrabbits, and
if possible, keep domestic rabbits indoors in areas with known disease. Outdoor rabbits should be
kept off the ground when possible. Owners are also asked to practice biosecurity to prevent accidentally spreading the RHDV2 virus to their rabbits. Avoid feeding hay grown or stored outdoors in areas
where wild rabbits are affected is recommended. Apparently healthy rabbits can spread the disease,
so rabbit owners should avoid direct or indirect contact between their animals and other rabbits.
There is no licensed RHDV2 vaccine approved for use in the United States; however, CDFA is allowing
California licensed veterinarians to import European vaccine to protect against RHDV2. Veterinarians
may send an email to [email protected] to receive an approval letter and instructions on
how to apply for a USDA import permit. Please report dead domestic rabbits to CDFA at 909–947–
4462 and/or submit to your local CAHFS laboratory for a diagnostic work-up. Consult your private
veterinarian if your domestic rabbit is sick. You may report dead wild rabbits on the California Department of Fish & Wildlife web site or by calling 916–358–2790.