What is Vesicular Stomatitis (VS)?Vesicular stomatitis is a viral disease that primarily affects horses, donkeys, mules, cattle, and swine. This disease also occasionally affects sheep and goats. Many species have been found to be susceptible.
What are the Symptoms of VS?The incubation period for VS ranges from two to eight days. Excessive salivation is often the first sign. Body temperature may rise immediately before or at the same time that blister-like lesions first appear in the mouth and dental pad, tongue, lips, nostrils, ears, hooves, and teats. These blisters swell and break, leaving raw tissue that is so painful that infected animals generally refuse to eat or drink and show signs of lameness.
The virus can spread rapidly in the herd, and up to 90% of the animals may show clinical signs and nearly all develop antibodies.
The morbidity rate for VS varies considerably within species. If there are no complications such as secondary infections, then affected animals recover in about two weeks. VS does not generally cause animals to die.
How is VS Diagnosed?All suspicious cases in non-equine species are treated with high-priority response by animal health officials. Samples are submitted to National Veterinary Services Laboratory for rapid diagnosis by virus detection and antibody levels in the bloodstream. Equine species may be handled as suspect cases based after the first case in a county.
How is the Virus Transmitted?Direct contact and infected feed and water are primary means of disease spread. Small black gnats of Culicoides sp. can transmit this disease by feeding on an infected animal and subsequently feeding on a susceptible animal. Other biting flies like sand flies, black flies, and mosquitoes also transmit the disease when they bite susceptible animals. Movement of infected animals in commerce or pleasure can also spread the disease.
Does VS Affect Humans?Humans can become infected with VS when handling affected animals if proper biosafety methods are not followed. Prevalence of this disease in humans may be under reported because it may often go undetected or may be misdiagnosed. In humans, VS causes an acute influenza-like illness with symptoms such as fever, muscle aches, headache, malaise, and blisters in the mouth. The disease course is four to seven days.
How is VS Treated?There is no specific treatment or cure for VS. Mild antiseptic mouthwashes may bring comfort and more rapid recovery to an affected animal.
Can I Protect My Livestock?No vaccines are available in the United States. Good use of control is important to prevent spread. Owners can protect their animals from disease by avoiding congregation of animals in the vicinity where VS has occurred. Movement of animals, trucks, trailers, and other fomites of contact should be restricted. Good sanitation and quarantine practices on affected farms usually contain the infection until it dies out.
Are Disinfectants Effective to Kill the Virus?Yes, 2% sodium hypochlorite; 4% sodium hydroxide; 2% iodophor disinfectant, and chlorine dioxide disinfectants.
Where is VS Found?Classic VS has been confirmed only in North and Central America and the northern part of South America. Sporadic outbreaks occur in the southwestern United States. During outbreaks in 2005, 2014, and 2015, VS was confirmed on a premises in Nebraska.
Why is there So Much Concern About VS?VS is very similar in its clinical appearance to Foot-and-Mouth Disease (FMD), so it is important to determine if, in fact, it is VS and not the more serious foreign animal disease, FMD.
Is VS a Reportable and Quarantinable Disease?YES! Veterinarians and livestock owners who suspect an animal may have VS or any other vesicular disease should immediately contact State or Federal animal health authorities.
Severe weight loss usually follows:
Recommended ActionsWhen a definite diagnosis is made on a farm, the following procedures are recommended:
Don't Wait: Report Vesicular diseases immediately!
For more information:
Nebraska Department of Agriculture
Animal & Health Protection
P.O. Box 94787
Lincoln, Nebraska 68509-4787
Toll Free: 800-572-2437