Common Pig Diseases and How to Prevent Them
Disease is one of the biggest risks in pig farming. One outbreak can wipe out your herd and your profit. Prevention protects your investment and keeps your farm stable.
This guide covers common pig diseases and how to prevent them.
African swine fever
This is the most dangerous pig disease. It spreads fast and has no cure.
Signs:
- High fever
- Loss of appetite
- Red or dark skin patches
- Sudden death
Impact:
Mortality can reach 100 percent. Farmers lose entire herds within days.
Prevention:
- Do not allow visitors into your farm
- Disinfect all equipment and footwear
- Avoid feeding raw kitchen waste
- Isolate new pigs for at least 2 weeks
Strict hygiene is your only protection.
Mange
Mange is a skin disease caused by mites.
Signs:
- Constant scratching
- Thick, rough skin
- Hair loss
- Slow growth
Impact:
Pigs eat less and grow slowly. Skin damage reduces market value.
Prevention:
- Keep pens clean and dry
- Treat pigs with recommended medication
- Isolate infected pigs
Early treatment prevents spread.
Worm infections
Internal parasites affect many pigs.
Signs:
- Weight loss
- Poor growth
- Pot-belly appearance
- Diarrhea
Impact:
Worms reduce feed efficiency. You spend more on feed with less growth.
Prevention:
- Deworm regularly
- Clean pens often
- Avoid overcrowding
Follow a deworming schedule every 2 to 3 months.
Foot and mouth disease
This disease affects movement and feeding.
Signs:
- Blisters on mouth and feet
- Lameness
- Drooling
- Fever
Impact:
Pigs stop eating and lose weight.
Prevention:
- Limit contact with other animals
- Disinfect entry points
- Report suspected cases early
Quick action reduces spread.
Swine dysentery
This is a severe intestinal disease.
Signs:
- Bloody diarrhea
- Weakness
- Rapid weight loss
Impact:
High death rate if untreated.
Prevention:
- Maintain clean water supply
- Keep pens dry
- Avoid contaminated feed
Clean environment reduces risk.
Pneumonia
Respiratory infections affect pig growth.
Signs:
- Coughing
- Difficulty breathing
- Nasal discharge
- Slow growth
Impact:
Reduced weight gain and higher treatment cost.
Prevention:
- Ensure good ventilation
- Avoid overcrowding
- Keep pigs warm during cold weather
Fresh air improves health.
Coccidiosis
This disease affects piglets.
Signs:
- Diarrhea in young pigs
- Dehydration
- Weakness
Impact:
High mortality in piglets.
Prevention:
- Keep farrowing pens clean
- Provide dry bedding
- Use preventive medication when needed
Clean conditions protect young pigs.
General prevention practices
You reduce disease risk with daily habits.
Follow these steps:
- Clean pens every day
- Disinfect weekly
- Provide clean water at all times
- Feed balanced diets
- Remove waste quickly
Consistency keeps your pigs healthy.
Quarantine new pigs
New pigs can bring disease.
Steps:
- Isolate new pigs for 14 days
- Observe for signs of illness
- Treat if needed before mixing
Never mix new pigs immediately.
Control farm access
Limit who enters your farm.
Rules:
- Allow only essential workers
- Provide footbaths at entry
- Use separate clothing for farm work
This reduces disease introduction.
Work with a veterinarian
Professional support helps you prevent problems.
You need:
- Vaccination schedule
- Proper diagnosis
- Treatment plan
Do not guess when pigs fall sick.
Monitor your pigs daily
Early detection saves lives.
Check for:
- Changes in feeding
- Unusual behavior
- Physical signs of illness
Act quickly when you notice problems.
Common mistakes to avoid
Avoid these errors:
- Ignoring early signs
- Delaying treatment
- Mixing sick and healthy pigs
- Poor sanitation
These mistakes lead to heavy losses.
Key takeaway
Disease prevention is part of daily farm management. Focus on hygiene, feeding, and monitoring. Isolate new pigs and control farm access.
Healthy pigs grow faster, cost less to manage, and bring better profit.