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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
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**Exposure keratitis
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**Fever during early stages
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**Recumbency and death within a few days in sheep and goats
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**Abortion up to 12 days after infection in cattle; usually recover but may get septicaemia
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*Septicaemic listeriosis:
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**Incubation period 2-3 days
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**Lambs and occasionally pregnant sheep
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**Occurs in newborn piglets, foals, poultry, adult sheep
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*Keratoconjunctivitis in cattle and sheep - direct contact with silage via eye
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*Pneumonia, myocarditis, enodcarditis
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*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]]
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