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== Introduction ==

== Introduction ==

Infection is via the faeco-oral route or the venereal route and transmission is due to introduction of live pigs with the disease or infected semen or ova. Lateral spread may also occur in younger pigs. Sows may remain carriers of the disease for many months and pass this on to up to 10% of their progeny.

Infection is via the faeco-oral route or the venereal route and transmission is due to introduction of live pigs with the disease or infected semen or ova. Lateral spread may also occur in younger pigs. Sows may remain carriers of the disease for many months and pass this on to up to 10% of their progeny.

== Clinical Signs ==

== Clinical Signs ==

Joints and bones may be involved in both sexes which may cause lameness and swelling. This can be severe enough to warrant their destruction on humane grounds.

Joints and bones may be involved in both sexes which may cause lameness and swelling. This can be severe enough to warrant their destruction on humane grounds.

== Diagnosis ==

== Diagnosis ==

A PCR has been used but some infected animals are antibody negative.

A PCR has been used but some infected animals are antibody negative.

== Control ==

== Control ==

Testing then slaughter is required immediately where the disease is exotic.

Testing then slaughter is required immediately where the disease is exotic.

[[Category:Reproductive Diseases - Pig]][[Category:Musculoskeletal Diseases - Pig]]

[[Category:Reproductive Diseases - Pig]][[Category:Musculoskeletal Diseases - Pig]]

[[Category:Expert_Review - Farm Animal]]

[[Category:Expert_Review - Farm Animal]]