Vesicular stomatitis holds steady in 35 Colorado counties
Colo. - Cases of vesicular stomatitis (VSV) have been identified in the
following 35 Colorado counties: Adams,
Alamosa, Arapahoe, Archuleta, Boulder, Broomfield, Chaffee, Conejos, Delta,
Dolores, Douglas, Eagle, El Paso, Fremont, Garfield, Gilpin, Grand, Gunnison,
Jefferson, La Plata, Larimer, Las Animas, Mesa, Mineral, Montezuma, Montrose,
Morgan, Ouray, Park, Pueblo, Rio Blanco, San Miguel, Summit, Teller, and Weld.
There are currently 18 quarantines remaining in 13 counties. The total count of
premises under quarantine for VSV by county is updated regularly on the CDA VSV website.
Although the majority of quarantines have been released, many horse and livestock movements are still impacted by VSV import requirements in other states. Many states have very stringent import requirements; for example, animals within 10 miles of a VSV quarantined premises in the previous 30, 60, or 90 days may not enter their state. Accredited veterinarians must ensure that horses and livestock meet the import requirements of destination states. Veterinarians can contact the State Veterinarian’s Office at 303-869-9130 with questions regarding health certificates.
The first case of VSV in Colorado was reported on July 3, 2019, in Weld County by a field veterinarian from the State Veterinarian’s Office at the Colorado Department of Agriculture. An incursion of VSV-infected insect vectors is the likely source of infection. There are no USDA approved vaccines for VSV.
see the USDA APHIS Veterinary Services website to read the current situation
report for all confirmed cases in the U.S.
Vesicular Stomatitis Background
Vesicular stomatitis is a viral disease that primarily affects horses and cattle but occasionally swine, sheep, goats, llamas, and alpacas will show clinical signs. The transmission process of VSV is not completely understood, but includes insect vectors such as black flies, sand flies, and biting midges.
incubation period ranges from 2-8 days. Clinical signs include vesicles,
erosions, and sloughing of the skin on the muzzle, tongue, ears, teats, and
coronary bands. Often excessive salivation is the first sign of disease, along
with a reluctance to eat or drink. Lameness and weight loss may follow.
may become infected when handling affected animals, but this is a rare
event. To avoid human exposure,
individuals should use personal protective measures when handling affected
for Livestock Owners
fly control is an important factor to inhibit the transmission of the disease.
Avoid transferring feeding equipment, cleaning tools or health care equipment from other herds.
Colorado veterinarians and livestock owners should contact the state of destination when moving livestock interstate to ensure that all import requirements are met. Contact information for all state veterinarian offices is listed here.
fairs, livestock exhibitions, and rodeos may institute new entry requirements
based on the extent and severity of the current VS outbreak. Certificates of
veterinary inspection (CVIs or health certificates) issued within 2-5 days
prior to an event can be beneficial in reducing risks. Be sure to stay informed
of any new livestock event requirements. See the Vesicular StomatitisGuidelines for Shows and Fairs.
Points for Veterinarians and Horse Owners
vesicular disease of livestock is reportable to the State Veterinarian’s Office
in Colorado – to report call 303-869-9130. If after hours, the voice message
will indicate which staff veterinarian is on call.