an inflammation of the meninges (usually the pia mater and arachnoid membrane of the brain/ spinal cord)
-Can be caused by viruses (mumps, herpes, ect), bacteria (Neisseria menigitidis, Streptococcus ssp, ect), fungi, parasites or toxins
-Inflammatory response causes swelling and increased pressure
-Symptoms include headache, fever, nuchal rigidity(neck stiffness), positive Brudzinski’s sign (neck flexion causes reflex flexion in hips and knees)
-Progression of infection can cause septic emboli (leading to strokes, gangrene, seizures, ect), depression of CNS functions and loss of consciousness.