Pleurisy in Pigs
- Pleurisy in pigs means inflammation of the pleura, the thin lining around the lungs and chest wall. It often happens with pneumonia, especially contagious pleuropneumonia caused by *Actinobacillus pleuropneumoniae*.
- Common signs include fever, reduced appetite, reluctance to move, fast or labored breathing, coughing, and sudden decline. Some pigs show chronic poor growth after surviving the initial infection.
- See your vet immediately if your pig has open-mouth breathing, blue or gray gums, collapse, marked lethargy, or sudden severe breathing effort.
- Your vet may recommend an exam, temperature check, listening to the chest, and testing such as bacterial culture, PCR, or necropsy in herd situations to confirm the cause and guide treatment.
- Typical US cost range for evaluation and treatment is about $150-$500 for outpatient farm or clinic care, and roughly $800-$2,500+ if hospitalization, oxygen support, imaging, or intensive monitoring are needed.
What Is Pleurisy in Pigs?
Pleurisy, also called pleuritis, is inflammation of the pleura, the thin tissue lining that covers the lungs and the inside of the chest. In pigs, it often develops alongside pneumonia, so your vet may talk about pleuropneumonia rather than pleurisy alone. When these tissues become inflamed, breathing can become painful and less efficient.
One of the best-known causes is Actinobacillus pleuropneumoniae, a contagious bacterial infection that can cause sudden, severe respiratory disease in pigs. Merck Veterinary Manual notes that disease from this organism can range from acute fibrinous pleuropneumonia with high illness and death rates to more chronic cases with pleuritis, slow growth, and lung abscesses. Mini pet pigs can also be affected, especially after exposure to carrier pigs or infected breeding animals.
For pet parents, the biggest concern is that breathing problems can worsen fast. Some pigs become obviously distressed within hours, while others survive the acute phase but are left with scarred lung tissue and ongoing respiratory limits. That is why early veterinary assessment matters, even if the first signs seem mild.
Symptoms of Pleurisy in Pigs
- Fast breathing or increased effort to breathe
- Reluctance to move because breathing is painful
- Fever
- Reduced appetite or not eating
- Coughing
- Open-mouth breathing or marked respiratory distress
- Sudden death in severe outbreaks
- Poor growth or chronic exercise intolerance after recovery
Pigs with pleurisy may look tucked up, quiet, and unwilling to walk because chest movement hurts. In more severe cases, they may breathe with their elbows held out, stretch the neck, or seem panicked when trying to get enough air.
See your vet immediately if your pig has labored breathing, blue or gray gums, collapse, or a sudden drop in energy. Even if symptoms seem less dramatic, fever, appetite loss, and persistent cough still deserve prompt veterinary attention because bacterial respiratory disease in pigs can progress quickly.
What Causes Pleurisy in Pigs?
The most important infectious cause of pleurisy in pigs is Actinobacillus pleuropneumoniae, the bacterium linked to contagious pleuropneumonia. According to Merck Veterinary Manual, this organism can cause abrupt, severe disease with high morbidity and mortality, especially in young pigs up to about 6 months old, though adults can also be affected during an initial outbreak.
Pleurisy can also develop as part of a broader respiratory disease complex. Other infections, crowding, poor ventilation, transport stress, mixing pigs from different sources, and concurrent disease can all make lung infection more likely or more severe. Merck specifically highlights management factors such as overstocking, inadequate ventilation, and immunosuppressive disease as important contributors to outbreaks and persistence.
In mini pet pigs, exposure history matters. Contact with carrier pigs, fairs, exhibitions, breeding stock, or newly introduced pigs can increase risk. Some pigs recover from the acute infection but are left with chronic pleural scarring and damaged lung tissue, which can affect long-term breathing and growth.
How Is Pleurisy in Pigs Diagnosed?
Your vet starts with the basics: history, temperature, breathing pattern, and a full physical exam. They will want to know when signs started, whether other pigs are affected, and whether there has been recent transport, new pig introductions, or exposure to outside swine. Listening to the chest may suggest lung involvement, but pleurisy itself is often confirmed by combining exam findings with testing.
Merck Veterinary Manual notes that bacterial culture can confirm Actinobacillus pleuropneumoniae in pleuropneumonia cases. In practice, your vet may also recommend PCR testing, samples from the respiratory tract, or postmortem testing if a pig dies and herd-level answers are needed. In some cases, imaging such as ultrasound or radiographs may help assess fluid, consolidation, or chronic chest changes, especially in an individual pet pig setting.
Diagnosis is not only about naming the organism. Your vet is also trying to judge severity, contagious risk, and whether the pig needs outpatient care, herd-level treatment planning, or more intensive support. That information helps shape realistic treatment options and next steps.
Treatment Options for Pleurisy in Pigs
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Veterinary exam or farm call
- Temperature and breathing assessment
- Empiric antibiotic plan chosen by your vet based on likely bacterial causes and local regulations
- Anti-inflammatory medication if appropriate
- Isolation from other pigs, reduced stress, easy access to water, and close home monitoring
Recommended Standard Treatment
- Full veterinary exam and treatment plan
- Targeted testing such as PCR, culture, or necropsy-based herd diagnostics when available
- Prescription antibiotics selected by your vet
- Anti-inflammatory and supportive care
- Recheck exam and monitoring for appetite, fever, and breathing response
- Biosecurity and isolation guidance for other pigs in the household or herd
Advanced / Critical Care
- Urgent or emergency veterinary assessment
- Hospitalization for oxygen support and intensive monitoring when needed
- Imaging such as chest radiographs or ultrasound in individual pet pig cases
- Expanded diagnostics including bloodwork and advanced pathogen testing
- Aggressive supportive care for dehydration, severe respiratory distress, or complications
- Detailed herd-control planning or referral support for complex outbreaks
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Pleurisy in Pigs
Bring these questions to your vet appointment to get the most out of your visit.
- Does my pig likely have pleurisy alone, or pleuropneumonia affecting both the lungs and pleura?
- Which infectious causes are most likely in my pig, and do you recommend culture, PCR, or other testing?
- How serious is my pig's breathing effort right now, and what warning signs mean emergency care?
- What treatment options fit my pig's condition and my budget, and what are the tradeoffs of each?
- Is my pig contagious to other pigs in the home, farm, or sanctuary, and how long should isolation last?
- What kind of long-term lung damage or exercise limits are possible after recovery?
- Should we review ventilation, stocking density, transport stress, or recent pig introductions as part of prevention?
- Are vaccines or herd-level control steps appropriate for the other pigs here?
How to Prevent Pleurisy in Pigs
Prevention focuses on lowering exposure and reducing the stressors that let respiratory disease spread. Merck Veterinary Manual recommends management steps such as all-in/all-out flow, closed herds when possible, testing, quarantine, avoiding overstocking, improving ventilation, and controlling other diseases that weaken immunity. Those same principles matter for pet pigs and sanctuary pigs, even on a smaller scale.
For pet parents, practical prevention means avoiding nose-to-nose contact with unfamiliar pigs, quarantining new arrivals, and being cautious with fairs, exhibitions, and breeding contacts. Good air quality matters more than many people realize. Damp bedding, ammonia buildup, dusty housing, and crowding can all make respiratory disease harder to control.
Vaccination may be part of prevention in at-risk or endemic groups, but it is not a one-size-fits-all answer. Merck notes that cross-protective vaccination is recommended for piglets in at-risk or endemic herds. Your vet can help decide whether vaccination, testing, or broader herd management changes make the most sense for your pig's situation.