ThePigSite Quick Disease Guide
Porcine Dermatitis and Nephropathy Syndrome (PDNS)
This disease is not new and has been recognised in most pig producing countries as a minor sporadic condition. In recent years bigger more severe outbreaks have occurred particularly in parts of Europe.
PDNS occurs mainly in growers and finishers but rarely in other age groups.
Clinical signs may occur in a herd in a few pigs sporadically and the disease may then go undiagnosed or they may occur in a bigger proportion of pigs and be economically damaging.
Mortality in affected pigs may be around 15%, death occurring within a few days of onset but mortality can rise much higher.
Pigs that recover are often permanently unthrifty.
SymptomsWeaners & Growers
- Appearance of extensive greasy brown, purplish red slightly raised blotches of various sizes and shapes over the chest, abdomen, thighs and forelegs. The majority of pigs that develop extensive skin blotching die.
- Over time the blotches become covered with dark infected crusts (dermatitis) and then fade leaving scars.
- The pigs are depressed.
- May have a fever.
- They are usually reluctant to move.
- Lose weight
- Sometimes breath heavily.
- Mortality high.
- Loss appetite.
Causes / Contributing factors
- The cause is unknown.
- It is not known how the disease spreads between pigs or between herds or what triggers off a clinical outbreak. However sources of incoming pigs must come from herds with no history of disease.