Difference between revisions of "Actinobacillus lignieresii"

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(Created page with '*Pathogenesis and pathogenicity: **Commensal in the mouth and intestinal tract of cattle and sheep **Penetrates damaged mucosa to cause chronic granulomatous inflammation of soft…')
 
(Redirected page to Actinobacillosis - Cattle)
 
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*Pathogenesis and pathogenicity:
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#REDIRECT[[Actinobacillosis - Cattle]]
**Commensal in the mouth and intestinal tract of cattle and sheep
 
**Penetrates damaged mucosa to cause chronic granulomatous inflammation of soft tissues, a condition known as Actinobacillosis
 
**Enodogenous, sporadic infection
 
**Lesions in the tongue, cheek, lips and sometimes in the lower gut and lungs from aspiration
 
**Often spreads from the site of infection to lymphatics, and may cause pyogranulomatous lymphadenitis
 
**[[Muscles Inflammatory - Pathology#Wooden tongue|Myositis]] and formation of fibrous tissue in the lesions lead to hardening of the tissue, hence the condition is known as 'wooden tongue' in cattle
 
**In sheep abscesses with thick walls are produced
 
**Feeding is impaired, causing loss of condition
 
**Infection in the oesophageal groove can cause tympany and enlargement of the retropharyngeal lymph node, causing difficulty in swallowing and breathing
 
**[[Bacterial skin infections - Pathology#Bacterial granulomatous dermatitis|Cutaneous lesions]] in cattle and sheep
 
**Contamination of the environment via ulcerating lesions
 
*Diagnosis:
 
**Induration of tongue
 
**Tissue sections may demonstrate pyogranulomatous foci containing club colonies
 
**Gram negative rods may be present in smears from exudates
 
**Cultures on blood agar and MacConkey agar, incubated for 24-72 hours
 
**Blood agar: small, sticky, non-haemolytic clonies
 
**MacConkey agar: slow lactose fermentation
 
*Treatment:
 
**Sodium iodide parenterally, or potassium iodide orally
 
**Potentiated sulphonamides or a penicillin/streptomycin combination
 
**Rough feed should be avoided
 
  
[[Category:Actinobacillus species]][[Category:Cattle]]
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[[Category:Actinobacillus species]][[Category:Cattle Bacteria]]

Latest revision as of 12:48, 11 June 2011