ThePigSite Quick Disease Guide
Bones affected with OP are quite normal in their structure but they become thinner particularly in the dense parts and shafts of the long bones. As a result they become more prone to fracture. OP can arise due to a shortage of calcium in the diet and imbalance of calcium and phosphorus, poor or inadequate absorption from the diet, with heavy losses during lactation and where there is a lack of exercise.
- Pigs show pain / discomfort.
- Sudden lameness
- Fracture of long bones.
- Loss of calcium and phosphorous during lactation.
- Faulty nutrition.
- Age of sow.
DiagnosisThis is based on clinical signs, a history in lactating and newly weaned sows and evidence of fractures of the long bones. If the herd has a problem it is necessary to examine the bones of an affected animal by x-ray to differentiate between OP and OM. Calcium and phosphorus levels may be normal.
Similar diseases include:
- Leg weakness or osteochondrosis.
- Spinal fractures.
- Torn muscles at their insertions into the bones.
- Mycoplasma hyosynoviae infection.