Respiratory Bacterial Infections - Pathology
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In general
- Main clinical expression is as secondary invaders of previously damaged lung tissue due to viral or parasitic involvement or environmental stress
- Some are initial pathogens in their own right while others can damage the tract allowing invasion by more pathogenic types
In Dogs
Tuberculosis - Dogs
Nocardiosis
In Cats
Chlamydiosis, Feline
Mycoplasma felis
In Horses
Strangles
Streptococcus equi subsp. zooepidemicus
Glanders
Rhodococcus equi
In Cattle
Necrotic Laryngitis
Cillia-associated Respiratory Bacillus
Pneumonic Pasteurellosis
Tuberculosis - Cattle
Contagious Bovine Pleuropneumonia
Enzootic Pneumonia - Calves
Acute Exudative Pneumonia
In Sheep
Laryngeal Chondritis
CAR bacillus
- As in cattle
Enzootic Pneumonia - Lambs
Melioidosis
In Pigs
Atrophic Rhinitis
Necrotic laryngitis in pigs
- As in cattle
- Caused by infection with Fusobacterium necrophorum
Enzootic Pneumonia - Pigs
Actinobacillus pleuropneumoniae
Pasteurellosis - Pigs
Contagious Porcine Pleuropneumonia
Glasser's disease
- Caused by Haemophilus parasuis
- May cause suppurative bronchopneumonia and pleuritis (as part of polyserositis)
- Stress of mixing, weaning and adverse environmental conditions are predisposing to the disease
Streptococcal pneumonia
- Caused by Streptococcus suis type II
Tuberculosis in pigs
- Pigs are susceptible to the Mycobacterium spp. causing tuberculosis in cattle
- Rarely extends to lungs after haematogenous spread from ingested bacteria causing tubercles with various degrees of calcification, encapsulation and caseation
In Rabbits
Snuffles
- Caused by Pasteurella multocida, less commonly and/or Bordetella bronchiseptica
- Clinical signs (nasal discharge, sneezing) result from an acute to chronic rhinitis
CAR bacillus
- As in cattle