CSU ext

ListeriosisListeria monocytogenes is a resistant bacterium that affects humans, cattle, sheep, goats, horses, and chickens.

How is it transmitted?  
Humans may become infected after eating non pasteurized cheeses, milk, deli meats, raw vegetables and drinking water contaminated with the Listeria organism. 
Animals become infected via Listeria contaminated food and water.

Cow drinking contaminated water
Animals drinking water contaminated with listeria

What are the signs in animals? Listeriosis in animals typically causes neurological signs like circling and unilateral facial paralysis,  abortions, and a high mortality rate in young animals.

liseriosis in sheep
Sheep infected with Listeriosis showing parlasys of left ear and face

What are the signs in humans?  Fever, muscle aches, and sometimes gastrointestinal symptoms such as nausea or diarrhea. If infection spreads to the nervous system, symptoms such as headache, stiff neck,  confusion, loss of balance, convulsions and abortion in pregnant women can occur.


More information at Merck Vet Manual: