The most common source(s) of infection in the central nervous system (CNS) is(are):
a. hematogenous spread.
b. infections at other sites such as otitis me-dia.
c. organisms gaining access because of ana-tomic defects in CNS structures.
d. bacteria that are able to travel along nerves leading to the brain.
A
Organisms may gain access to the CNS by several primary routes. Hematogenous spread is the most common way that the CNS becomes infected. Direct spread from an infected site, defects in the CNS structures, and travel along the nerves leading to the brain are other routes.
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