Difference between revisions of "Respiratory Bacterial Infections - Pathology"

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*Caused by infection with [[Fusobacterium|''Fusobacterium necrophorum'']]
 
*Caused by infection with [[Fusobacterium|''Fusobacterium necrophorum'']]
  
===Enzootic pneumonia of pigs===
+
===[[Enzootic Pneumonia - Pigs]]===
[[Image:Enzootic pneumonia of pigs.jpg|right|thumb|100px|<small><center>Enzootic pneumonia of pigs(Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
 
  
*Caused by ''[[Mycoplasma hyopneumoniae]]'' and ''[[Mycoplasma hyorhinis]]''
 
*Also called '''mycoplasmal pneumonia'''
 
*Major cause of unthriftiness in young pigs
 
*[[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|Pneumonia]] in weaned pigs
 
*Cough, reduced growth rate
 
*Attached to cilia - no [[Respiratory System General Introduction - Pathology#Mucociliary escalator|mucociliary clearance]]
 
*Usually non-fatal unless there is secondary infection (e.g. [[Pasteurella multocida|''Pasteurella multocida'']])
 
*Gross pathology:
 
**Confluent consolidation of the cranioventral lung lobes
 
**In other areas there may be small red to grey focal lesions evident which indicate the bronchiolar orientation of the inflammatory process
 
*Histologically
 
**Changes result from a catarrhal [[Lungs Inflammatory - Pathology#Bronchointerstitial pneumonia|bronchointerstitial pneumonia]]
 
**In chronic cases, prominent accumulations of lymphoid cells can be seen around airways and blood vessels
 
  
 
===''Actinobacillus pleuropneumoniae''===
 
===''Actinobacillus pleuropneumoniae''===

Revision as of 14:18, 30 June 2010


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()Map CARDIORESPIRATORY SYSTEM (Map)
RESPIRATORY SYSTEM INFLAMMATION



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

Infectious Canine Tracheitis

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

Enzootic Pneumonia - Lambs

Melioidosis

In Pigs

Atrophic Rhinitis

Necrotic laryngitis in pigs

Enzootic Pneumonia - Pigs

Actinobacillus pleuropneumoniae

Pasteurellosis in pigs

Contagious porcine pleuropneumonia

  • Caused by Haemophilus (Actinobacillus) pleuropneumonia
  • 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
  • A fibrinonecrotic bronchopneumonia with pleurisy
  • Foci of haemorrhagic consolidation or necrosis, mainly around major bronchi, tend to sequestrate
  • Tending to spread throughout all lung lobes: therefore a cranioventral distribution may not be particularly evident

Glasser's disease

Streptococcal pneumonia

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

CAR bacillus