Meningitis, infectious
Meningitis caused by bacterial, viral, or protozoan infection.
Most of the agents known to cause meningitis are infectious, but very few people exposed to them will get meningitis.
Those at greatest danger include people with AIDS, infants, transplant patients, and others whose immune systems may be compromised.
For this reason, infectious meningitis patients are almost always isolated until the risk of spreading the illness to others has passed