Changes

==History and Clinical Signs==

==History and Clinical Signs==

In ruminants listeriosis is seen as affects the nervous system causing a meningoencephalitis. Animals will present dull, sometimes with a head tilt, facial paralysis in monogastric animals and young ruminants it causes a septicaemia. If animals are infected whilst pregnant this can cause abortion. Following abortion however the animal will recover normally.

In ruminants listeriosis affects the nervous system causing a meningoencephalitis. Animals present dull, sometimes with a head tilt, facial paralysis, a drooping eyelid and often circling. In monogastric animals and young ruminants listeriosis causes septicaemia.  

Listeriosis can also manifest as conjunctivitis, pneumonia, myocarditis and endocarditis.

If animals are infected whilst pregnant this can cause abortion up to 12 days later. Following abortion the animal will often recover normally unless the foetus is retained when septicaemia will follow.

Listeriosis can also manifest as conjunctivitis when infected silage come in contact with the animals eye, pneumonia, myocarditis and endocarditis.

 

**Incubation period 14-40 days

**Incubation period 14-40 days

 

**Exposure keratitis

**Exposure keratitis

**Fever during early stages

**Fever during early stages

**Lambs and occasionally pregnant sheep

**Lambs and occasionally pregnant sheep

**Occurs in newborn piglets, foals, poultry, adult sheep

**Occurs in newborn piglets, foals, poultry, adult sheep

==Pathology==

==Pathology==