Changes

***[[Pasteurella species and Mannheimia haemolytica|''Pasteurella multocida'']]

***[[Pasteurella species and Mannheimia haemolytica|''Pasteurella multocida'']]

***[[Arcanobacter pyogenes|''Arcanobacter pyogenes'']]

***[[Arcanobacter pyogenes|''Arcanobacter pyogenes'']]

***[[Haemophilus species|''Haemophilus sommus'']]

***''[[Haemophilus sommus]]''

*All transmitted by aerosol and direct contact

*All transmitted by aerosol and direct contact

*Gross pathology:  

*Gross pathology:  

*The most significant disease here is that caused by ''P. multocida'' secondary to underlying [[Mycoplasmas|''mycoplasma'' pneumonia]], see above [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of pigs|enzootic pneumonia of pigs]]

*The most significant disease here is that caused by ''P. multocida'' secondary to underlying [[Mycoplasmas|''mycoplasma'' pneumonia]], see above [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of pigs|enzootic pneumonia of pigs]]

**This results in chronic suppurative [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchopneumonia]]  with abscessation and [[Pleural Cavity & Membranes Inflammatory - Pathology|pleuritis]]

**This results in chronic suppurative [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchopneumonia]]  with abscessation and [[Pleural Cavity & Membranes Inflammatory - Pathology|pleuritis]]

*If there is considerable pleural involvement, it may be indistinguishable from lesions caused by ''Haemophilus pleuropneumonia'' (below)

*If there is considerable pleural involvement, it may be indistinguishable from lesions caused by ''[[Haemophilus pleuropneumonia]]'' (below)

*Also isolated from cases of meningitis and septicaemia in piglets

*Also isolated from cases of meningitis and septicaemia in piglets

===Contagious porcine pleuropneumonia===

===Contagious porcine pleuropneumonia===

*Caused by [[Haemophilus species|''Haemophilus (Actinobacillus) pleuropneumonia'']]

*Caused by [[Haemophilus pleuropneumonia|''Haemophilus (Actinobacillus) pleuropneumonia'']]

*Seen mainly between 6wks-6mths of age but will affect any age

*Seen mainly between 6wks-6mths of age but will affect any age

*Highly pathogenic strains are capable of initiating disease on their own with high mortality in young pigs

*Highly pathogenic strains are capable of initiating disease on their own with high mortality in young pigs

===Glasser's disease===

===Glasser's disease===

*Caused by [[Haemophilus species|''Haemophilus parasuis'']]

*Caused by ''[[Haemophilus parasuis]]''

*May cause suppurative [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|broncho]][[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|pneumonia]] and [[Pleural Cavity & Membranes Inflammatory - Pathology|pleuritis]] (as part of polyserositis)

*May cause suppurative [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|broncho]][[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|pneumonia]] and [[Pleural Cavity & Membranes Inflammatory - Pathology|pleuritis]] (as part of polyserositis)

*Stress of mixing, weaning and adverse environmental conditions are predisposing to the disease

*Stress of mixing, weaning and adverse environmental conditions are predisposing to the disease