Most Common Pig Diseases and How to Prevent Them:

Most Common Pig Diseases and How to Prevent Them: A Complete Guide by Aaron Vet Farms

Discover the most common pig diseases affecting farmers in Uganda and beyond, their causes, symptoms, treatment options, and practical prevention strategies. Expert veterinary guide by Aaron Vet Farms.

Keeping pigs healthy is the foundation of profitable pig farming. When diseases strike, they slow growth, lower feed efficiency, increase mortality, and cause major financial losses—especially for small- and medium-scale farmers. At Aaron Vet Farms, we believe that prevention is always better than cure.

1. African Swine Fever (ASF)

African Swine Fever is one of the deadliest pig diseases, with up to 100% mortality. There is no treatment and no vaccine, making prevention essential.

Symptoms

Sudden deaths

High fever

Red or blue skin patches

Nose bleeding

Weakness and loss of appetite

Prevention

Strict farm biosecurity: control farm entry, disinfect equipment, enforce footbaths.

Prevent pigs from contacting wild pigs or contaminated pork products.

Quarantine all new pigs for 21–30 days.

Report any sudden deaths immediately to veterinary authorities.

2. Classical Swine Fever (CSF)

Also known as Hog Cholera, CSF is highly contagious and resembles ASF, but it can be prevented through vaccination.

Symptoms

Fever
Red skin spots
Diarrhoea
Weakness
Sudden deaths in young pigs

Prevention

Vaccinate pigs according to your veterinary vaccination schedule.
Maintain high hygiene standards in pens.
Avoid buying pigs from unknown sources.
Quarantine new animals before mixing them with the main herd.

3. Porcine Reproductive and Respiratory Syndrome (PRRS)

PRRS affects the reproductive system in sows and the respiratory system in young pigs.

Symptoms

In sows:
Abortions
Stillbirths
Weak piglets
In growers and weaners:
Breathing difficulties
Fever
Poor growth

Prevention

Source breeding stock from reputable farms.
Keep pig housing well-ventilated.
Follow an updated vaccination program.
Reduce stress caused by overcrowding or sudden diet changes.

4. Swine Dysentery

A severe bacterial disease causing bloody diarrhoea in growing pigs.

Symptoms

Watery, bloody diarrhoea
Dehydration
Weight loss
Reduced feed intake

Prevention

Maintain strict pen sanitation.
Control rodents, which spread the disease.
Disinfect pens thoroughly between batches.
Provide clean water at all times.

5. Erysipelas

Erysipelas affects pigs of all ages, causing sudden deaths or chronic infections affecting joints and the heart.

Symptoms

High fever
Diamond-shaped skin lesions
Joint swelling
Sudden death in severe cases

Prevention

Routine vaccination
Maintain clean living conditions
Provide balanced nutrition to boost immunity
Remove sick animals immediately for treatment

6. Mange (Skin Parasites)

Mange is one of the most common external parasites in pig farms, reducing feed efficiency and causing discomfort.

Symptoms

Scratching and skin irritation
Thick, scaly skin
Poor growth rates
Restlessness

Prevention

Regular deworming and external parasite control
Clean bedding and proper waste management
Isolate newly purchased pigs before introduction
Spray or dip pigs with recommended acaricides

7. Pneumonia

Pneumonia in pigs is usually caused by bacteria, viruses, or environmental stress like poor ventilation.

Symptoms

Coughing
Labored breathing
Fever
Poor growth

Prevention

Ensure proper ventilation in pig houses
Avoid overcrowding
Maintain dry, warm bedding
Reduce dust and ammonia levels
Provide high-quality feed

8. Foot and Mouth Disease (FMD)

Although more common in cattle, FMD can affect pigs severely and spread rapidly.

Symptoms

Blisters on feet and snout
Drooling
Lameness
Fever

Prevention

Restrict animal movement
Vaccinate when recommended
Maintain strict hygiene
Avoid sharing tools with other farms

9. Worm Infestations

Internal parasites reduce growth rate and feed efficiency, especially in weaners and growers.

Symptoms

Poor weight gain
Rough hair coat
Diarrhoea
Reduced appetite

Prevention

Deworm pigs every 2–3 months
Keep pens dry and clean
Avoid feeding pigs on the ground
Rotate pastures if pigs are free-range
General Disease Prevention Strategies for Pig Farmer
Beyond individual diseases, good farm management can prevent most outbreaks. At Aaron Vet Farms, we recommend the following:

1. Implement Strict Biosecurity

Limit visitors to the farm
Provide farm boots and overalls
Disinfect entrances and tools
Keep animals from different age groups separated

2. Follow a Proper Vaccination Program

Vaccination protects your herd from deadly viruses like CSF, Erysipelas, and more. Consult your vet for a farm-specific vaccination plan.

3. Maintain Clean and Well-Ventilated Housing

Clean pens daily
Remove manure regularly
Ensure adequate airflow
Keep bedding dry
Proper housing reduces respiratory diseases and diarrhea.

4. Provide Balanced Nutrition and Clean Water

Malnourished pigs have weak immune systems. Ensure feed is high-quality and water sources are clean to avoid waterborne diseases.

5. Quarantine New Pigs

Always isolate new pigs for 21–30 days to monitor signs of disease before mixing them.

6. Conduct Routine Health Checks

Early detection saves lives and reduces losses. Observe pigs daily for changes in:
Appetite
Behavior
Movement
Breathing

Conclusion

Pig disease prevention is the key to achieving high growth rates, reduced mortality, and better farm profits. By understanding the most common pig diseases and embracing strong biosecurity, vaccination, and management practices, farmers can protect their herds all year round.