In simple words: Listerial meningoencephalitis is a brain infection caused by bacteria usually found in contaminated food. It mainly affects people with weak immune systems, like those with cancer, pregnant women, newborns, people taking steroids, and older adults.

Listerial meningoencephalitis is an inflammation of the protective membranes around the brain caused by the bacterium Listeria monocytogenes.It's typically contracted through contaminated food and commonly affects individuals with weakened immune systems, such as those with neoplastic disease, pregnant women, newborns, patients taking high doses of steroids, and the elderly.

Example 1: A 70-year-old individual with a history of lymphoma presents with fever, headache, and confusion.Testing reveals Listeria monocytogenes in their spinal fluid, confirming a diagnosis of listerial meningoencephalitis., A pregnant woman in her third trimester experiences fever, neck stiffness, and vomiting.Listerial meningoencephalitis is suspected, and antibiotic treatment is initiated after laboratory confirmation., A newborn infant develops fever, lethargy, and poor feeding.After a thorough evaluation, including blood and spinal fluid analysis, the infant is diagnosed with listerial meningoencephalitis.

Documentation should include signs and symptoms, patient history (including any underlying conditions or risk factors), laboratory results confirming the presence of Listeria monocytogenes, imaging findings (if applicable), and treatment plan.