Teschovirus Encephalomyelitis in Pigs: Teschen and Talfan Disease Explained
- See your vet immediately if your pig has wobbliness, weakness, tremors, or trouble standing. Neurologic signs can worsen quickly.
- Teschovirus encephalomyelitis is a viral disease of pigs that affects the brain and spinal cord. Severe forms are often called Teschen disease, while milder forms are called Talfan disease.
- There is no specific antiviral treatment. Care is supportive and focused on hydration, nursing care, pain and stress reduction, and preventing secondary problems.
- Diagnosis usually requires a herd history, neurologic exam, and laboratory testing of tissues or samples. Definitive confirmation often depends on PCR, virus isolation, and postmortem testing.
- Typical US cost range is about $250-$900 for exam, farm call, sample collection, and basic testing, and $600-$2,000+ if necropsy, histopathology, multiple PCR panels, isolation, hospitalization, or herd-level investigation are needed.
What Is Teschovirus Encephalomyelitis in Pigs?
Teschovirus encephalomyelitis is a viral neurologic disease of pigs caused by Teschovirus A, a picornavirus that can infect the brain and spinal cord. You may also hear it called porcine polioencephalomyelitis. The severe form is traditionally called Teschen disease, while milder forms are often called Talfan disease.
This disease is uncommon in many regions, but it matters because it can cause sudden weakness, incoordination, paralysis, and death. Clinical severity varies a lot. Some pigs have mild, short-lived signs and recover, while others develop rapid progression to recumbency and coma.
Younger pigs, especially suckling and nursery pigs, appear more likely to develop severe neurologic disease than mature pigs. Even so, any pig with new neurologic signs needs prompt veterinary attention because several serious diseases can look similar at first.
Symptoms of Teschovirus Encephalomyelitis in Pigs
- Ataxia or wobbliness
- Weakness or paresis
- Paralysis or inability to stand
- Tremors
- Hypermetria or exaggerated limb movements
- Lethargy and reduced appetite
- Fever
- Nystagmus, opisthotonus, or lateral recumbency
- Dehydration, hypothermia, or coma
See your vet immediately if your pig is weak, dragging limbs, unable to rise, trembling, or showing any sudden neurologic change. Early signs can look subtle at first, but progression may happen over a short period. Because other serious diseases can cause similar signs, your vet may recommend isolation, testing, and careful monitoring of other pigs in the group.
What Causes Teschovirus Encephalomyelitis in Pigs?
Teschovirus encephalomyelitis is caused by Teschovirus A. Severe outbreaks have classically been linked to highly pathogenic strains, especially Teschovirus A1, while milder disease has been associated with other genotypes. Many infections are thought to be asymptomatic, which means a pig can be infected without showing obvious neurologic disease.
The virus is spread mainly through direct or indirect contact with infected secretions, especially feces. After a pig swallows the virus, it replicates in the tonsils and gastrointestinal tract. From there, it may spread through the bloodstream for a short time or move along nerves from the gut to the central nervous system.
Crowding, movement of pigs, shared equipment, contaminated boots or clothing, and mixing age groups can all increase the chance of spread within a group. Wild boars and domestic pigs are recognized natural hosts, so biosecurity matters both on farms and in backyard pig settings.
How Is Teschovirus Encephalomyelitis in Pigs Diagnosed?
Diagnosis starts with a prompt veterinary exam and a careful history. Your vet will look at the pig's age, how quickly signs developed, whether more than one pig is affected, and whether there has been recent movement, exposure, or illness in the group. Because the incubation period is often about 8 to 14 days after exposure, recent herd events can be important.
Teschovirus encephalomyelitis cannot be confirmed from symptoms alone. Other conditions can look very similar, including porcine astrovirus type 3, Sapelovirus A, pseudorabies, classical swine fever, PRRSV, PCV2, edema disease, Streptococcus suis meningoencephalitis, and some toxicities. That is why laboratory testing matters.
Your vet may recommend sample submission to a veterinary diagnostic lab. Tests can include PCR, virus isolation, immunofluorescence, in situ hybridization, serology, and histopathology. Definitive diagnosis often relies on central nervous system tissues, especially brain and spinal cord, collected aseptically from affected pigs, often after necropsy. In real-world cases, the workup may involve both individual-pig testing and herd-level investigation.
Treatment Options for Teschovirus Encephalomyelitis in Pigs
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Urgent farm or clinic exam
- Isolation from the group
- Supportive nursing care at home or on-farm
- Fluids by mouth if safe and directed by your vet
- Bedding, warmth, easy access to water, and pressure-sore prevention
- Monitoring for worsening weakness, dehydration, or inability to eat
Recommended Standard Treatment
- Veterinary exam and neurologic assessment
- Farm call or haul-in evaluation
- Sample collection and submission for PCR or other lab testing
- Prescription supportive care directed by your vet
- Anti-inflammatory or comfort-focused medications if your vet feels they are appropriate
- Biosecurity plan for isolation, sanitation, and monitoring exposed pigs
Advanced / Critical Care
- Hospitalization or intensive on-farm supportive care
- IV or injectable fluids and assisted feeding plans when appropriate
- Repeated neurologic reassessments
- Necropsy and histopathology if a pig dies or euthanasia is recommended
- Expanded infectious disease testing and differential diagnosis workup
- Herd-level consultation, movement recommendations, and regulatory coordination if needed
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Teschovirus Encephalomyelitis in Pigs
Bring these questions to your vet appointment to get the most out of your visit.
- Based on my pig's signs, what are the top diseases on your differential list?
- Does my pig need to be isolated right away, and how should I handle boots, tools, bedding, and manure?
- Which tests are most useful in this case, and what samples do you need?
- If testing is limited by budget, what is the most practical first step?
- What signs would mean this is becoming an emergency or that euthanasia should be discussed?
- How should I monitor the other pigs in the group over the next 2 weeks?
- Are there local or state reporting requirements if you suspect a contagious neurologic disease?
- What cleaning and disinfection steps are most important for this virus in my setup?
How to Prevent Teschovirus Encephalomyelitis in Pigs
Prevention centers on biosecurity. There is no commercially available vaccine in current routine use, so reducing exposure is the main strategy. Keep new pigs separated before introducing them, avoid sharing equipment between groups without cleaning, and limit contact with outside pigs or wild boars when possible.
Because the virus is commonly spread through fecal contamination, manure management and sanitation matter. Clean boots, tools, feeders, waterers, trailers, and handling areas. Separate age groups when you can, and avoid unnecessary mixing during transport, shows, sales, or herd additions.
If a pig develops neurologic signs, isolate that pig and contact your vet promptly. Fast diagnosis helps guide care and can reduce spread in the rest of the group. In some settings, your vet may also advise movement restrictions, enhanced disinfection, and close observation of exposed pigs for at least the next couple of weeks.