How is Listeria monocytogenes infection diagnosed?
Symptoms such as fever and a stiff neck could be the result of listeriosis.
If you think you might have listeriosis—especially if you are a pregnant woman—consult your doctor immediately. Your doctor can do either a blood or spinal fluid test to determine if you do have Listeriosis. A blood test is typically the most reliable way to find out if your symptoms are due to listeriosis, but in some cases urine or amniotic fluid (the fluid that surrounds and protects a baby before birth) may be tested as well.