Difference between revisions of "Caseous Lymphadenitis"

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Caseous lymphadenitis:
 
Caseous lymphadenitis:
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Extra information on [[Lymphoreticular - bacterial diseases|lymphobacteria bacterial disease]]
 
caused by [[Corynebacterium ovis]]
 
caused by [[Corynebacterium ovis]]
 
**[[Corynebacterium pseudotuberculosis|''C. pseudotuberculosis'']] carried on skin of sheep
 
**[[Corynebacterium pseudotuberculosis|''C. pseudotuberculosis'']] carried on skin of sheep

Revision as of 09:55, 28 July 2010

Caseous lymphadenitis:

Extra information on lymphobacteria bacterial disease caused by Corynebacterium ovis

    • C. pseudotuberculosis carried on skin of sheep
    • Non-nitrate-reducing biotype
    • Infection follows tissue trauma such as shearing wounds
    • Incubation period 3 months
    • Chronic suppurative infection of sheep, goats and occasionally cattle
    • Abscessation of superficial and internal lymph nodes if haemtogenous spread occurs
    • Caseous abscesses with green colour and onion ring appearance
    • Ill thrift and pneumonia may occur
    • Condemnation of carcasses and hides
    • Infection spread by pus from abscesses, and oculonasal secretions
    • Organism survives in environment for several months
    • Sandwich ELISA detects circulating antibodies to phospholipase toxin
    • Control: importation measures including screening; culling of infected sheep, stict hygiene; inactivated vaccine
  • Ulcerative lymphangitis:
    • Nitrate reducing biotype
    • Disease in horses and cattle
    • Infection through skin wounds
    • Lymphangitis of lower limbs or abscessation in pectoral region
    • Slow onset, usually becomes chronic
    • Affected lymphatic vessels swollen and firm with nodules
    • Oedema in affected limbs
    • Ulcerative nodules exude thick green pus
    • Lymphangitis and lymphadenitis in cattle with abscesses as well as coronary band lesions causing lameness
    • Antibiotic treatment and topical iodophore shampoo
  • May cause myositis