Pleurisy is a common result of pathogens/ foreign material gaining access to the pleural cavity.  Organism are moved to the pleural cavity as part of the respiratory systems defence mechanisms.

It is not possible to differentiate the cause of the pleurisy by the gross examination of the carcase.  The lesion is a healing scar tissue and generally sterile.

Pleurisy can be present for several months before resolution.

Therefore, pleurisy seen in the slaughterhouse may have occurred at any time in the last 5 months – thus the entire life of the pig!


Slaughterhouse examination

Abatoir pleuristy.JPG

pleurisy Fibrin tag2

Pleurisy on the surface of the lung or attached to the carcase rib cage

Postmortem findings associated with a variety of pleurisy causing pathogens

Pleurisy acute

Pleurisy septic 1 au

Glassers pleurisy kr 2

Actinobacillus pleuropneumoniae

Streptococcus spp.

Haemophilus parasuis – Glässer’s

Glassers chronic1 pleurisy

pleurisy au 2

Pleuisy chronic

Mycoplasma hyorhinis - Glässer’s

Actinobacillus suis

Arcanobacterium pyogenes

pleurisy septic4

Pneumonia and pleurisy severe au

Pleurisy can also be associated with other pathogens for example:

Escherichia coli

Swine Influenza – localized areas

Septic pleuritis – pseudomonas – from a puncture wound

Complicated enzootic pneumonia – Pasteurella multocida




Tail biten severe

Vice flank biting 2

Vice ear sucking 2

Vice – Tail biting

Flank biting

Ear sucking

Lame swollen joint hind 2

Lame Bush foot infected gross

Respiratory problem sp

Foot injuries

Respiratory infections

Treatment and control


Review causes of vice


Review the flooring


Review post-weaning housing and stress factors – especially air and water supplies


Control Glässer’s Disease


Control clinical Actinobacillus pleuropneumonia.  Majority of farms are positive to at least one serotype of APP – but do not have any significant pleurisy issue

Air weaner chilled B

Feed feed space

Water fighting over drinker

Avoid: Draughts

Fighting over feed

Fighting over water

Floor  feeder pad detail

Floor Crowdingsw

floor bent nail in wall tw

Rough floors – note new floors can be particularly problematic

Poor pig flow

Remove any sharp objects within pig height