Difference between revisions of "Listeria monocytogenes"

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*Outbreaks of listeriosis caused by ''L. monocytogenes'' seasonal and linked to silage feeding
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*Replicates in poor quality silage where the pH excedes 5.5
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==Listeria monocytogenes==
*Animals highly susceptible during pregnancy due to lowered cell-mediated immunity
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*Neural listeriosis:
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Outbreaks of listeriosis are caused by ''L. monocytogenes''. The outbreaks are seasonal and linked to silage feeding.
**Incubation period 14-40 days
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Listeria monocytogenes replicates in poor quality silage, where the pH excedes 5.5.
**Meningoencephalitis
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Animals are highly susceptible during pregnancy due to lowered cell-mediated immunity.
**Dullness, circling, head tilt, facial paralysis, drool saliva, droop of eyelid and ear
 
**Exposure keratitis
 
**Fever during early stages
 
**Recumbency and death within a few days in sheep and goats
 
**Abortion up to 12 days after infection in cattle; usually recover but may get septicaemia
 
*Septicaemic listeriosis:
 
**Incubation period 2-3 days
 
**Lambs and occasionally pregnant sheep
 
**Occurs in newborn piglets, foals, poultry, adult sheep
 
*Keratoconjunctivitis in cattle and sheep - direct contact with silage via eye
 
*Pneumonia, myocarditis, enodcarditis
 
*Zoonosis - consumption of contaminated unpasteurised milk; memingitis and meningoencephalitis; abortion
 
  
 
[[Category:Listeria species]][[Category:Sheep]][[Category:Pig]][[Category:Horse]]
 
[[Category:Listeria species]][[Category:Sheep]][[Category:Pig]][[Category:Horse]]
 
[[Category:To_Do_-_Bacteria]]
 
[[Category:To_Do_-_Bacteria]]

Revision as of 09:45, 7 July 2010

Listeria monocytogenes

Outbreaks of listeriosis are caused by L. monocytogenes. The outbreaks are seasonal and linked to silage feeding. Listeria monocytogenes replicates in poor quality silage, where the pH excedes 5.5. Animals are highly susceptible during pregnancy due to lowered cell-mediated immunity.