Difference between revisions of "Corynebacterium pseudotuberculosis"

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*Caseous lymphadenitis:
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**''C. pseudotuberculosis'' carried on skin of sheep
 
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**Non-nitrate-reducing biotype
 
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**Infection follows tissue trauma such as shearing wounds
 
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**Incubation period 3 months
 
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**Chronic suppurative infection of sheep, goats and occasionally cattle
 
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**Abscessation of superficial and internal lymph nodes if haemtogenous spread occurs
 
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**Caseous abscesses with green colour and onion ring appearance
 
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**Ill thrift and pneumonia may occur
 
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**Condemnation of carcasses and hides
 
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**Infection spread by pus from abscesses, and oculonasal secretions
 
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**Organism survives in environment for several months
 
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**Sandwich ELISA detects circulating antibodies to phospholipase toxin
 
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**Control: importation measures including screening; culling of infected sheep, stict hygiene; inactivated vaccine
 
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*Ulcerative lymphangitis:
 
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**Nitrate reducing biotype
 
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**Disease in horses and cattle
 
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**Infection through skin wounds
 
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**Lymphangitis of lower limbs or abscessation in pectoral region
 
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**Slow onset, usually becomes chronic
 
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**Affected lymphatic vessels swollen and firm with nodules
 
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**Oedema in affected limbs
 
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**Ulcerative nodules exude thick green pus
 
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**Lymphangitis and lymphadenitis in cattle with abscesses as well as coronary band lesions causing lameness
 
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**Antibiotic treatment and topical iodophore shampoo
 
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*May cause [[Muscles Inflammatory - Pathology#Abscesses|myositis]]
 
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*Involved in [[Bacterial skin infections - Pathology#Deep pyoderma|deep pyoderma]]
 
  
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[[Category:Corynebacterium species]][[Category:Sheep]][[Category:Horse]][[Category:Cattle]]
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{| cellpadding="10" cellspacing="0" border="1"
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[[Category:To_Do_-_Bacteria]]
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| Also known as:
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| ''C.pseudotuberculosis''
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|-
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|}
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''Corynebacterium pseudotuberculosis'' is a species of the ''[[Corynebacterium species - Overview|Corynebacterium]]'' genus. It causes [[caseous lymphadenitis]] and is involved in [[Bacterial skin infections - Pathology#Deep pyoderma|deep pyoderma]].
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The organism survives in environment for several months and causes disease in horses and cattle.
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''C. pseudotuberculosis'' produces small, white colonies, surrounded by a narrow zone of complete haemolysis. The colonies become dry and cream-coloured. Certain strains of ''C. pseudotuberculosis'' reduce nitrates and an enhancement of haemolysis is produced by ''C. pseudotuberculosis'' when inoculated across a streak of ''Rhodococcus equi''.
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[[Category:Corynebacterium species]]
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[[Category:To_Do_-_AimeeHicks]]

Revision as of 14:02, 26 July 2010


 This article is still under construction.


Also known as: C.pseudotuberculosis

Corynebacterium pseudotuberculosis is a species of the Corynebacterium genus. It causes caseous lymphadenitis and is involved in deep pyoderma.

The organism survives in environment for several months and causes disease in horses and cattle. C. pseudotuberculosis produces small, white colonies, surrounded by a narrow zone of complete haemolysis. The colonies become dry and cream-coloured. Certain strains of C. pseudotuberculosis reduce nitrates and an enhancement of haemolysis is produced by C. pseudotuberculosis when inoculated across a streak of Rhodococcus equi.

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