Changes

*Common in animals

*Common in animals

*Inflammatory agents reach the pleura by:

*Inflammatory agents reach the pleura by:

**Extension from [[Lungs - inflammatory|pneumonia]]

**Extension from [[Lungs Inflammatory - Pathology|pneumonia]]

***Pleuropneumonia (fibrinous [[Lungs - inflammatory#Bronchopneumonia|bronchopneumonia]])- inflammation of [[Mesothelial cells|mesothelial cells]] associated with parenchymal disease due to bacterial infection

***Pleuropneumonia (fibrinous [[Lungs Inflammatory - Pathology#Bronchopneumonia|bronchopneumonia]])- inflammation of [[Mesothelial cells|mesothelial cells]] associated with parenchymal disease due to bacterial infection

**Bloodstream

**Bloodstream

**Trans-diaphragmatic lymphatics from [[Peritoneal cavity - inflammatory|peritoneal cavity]]

**Trans-diaphragmatic lymphatics from [[Peritoneal cavity - inflammatory|peritoneal cavity]]

*Most significant in:

*Most significant in:

**'''Horses'''

**'''Horses'''

***Usually secondary to [[Lungs - inflammatory|pneumonia]] or [[Lungs - inflammatory#Pulmonary abscesses|lung abscesses]]

***Usually secondary to [[Lungs Inflammatory - Pathology|pneumonia]] or [[Lungs Inflammatory - Pathology#Pulmonary abscesses|lung abscesses]]

***[[Streptococci|''Streptococci'']] are most commonly isolated

***[[Streptococci|''Streptococci'']] are most commonly isolated

***Usually yellow exudate

***Usually yellow exudate