Answer:
Psychological disorders are a group of symptoms that can be caused by an infection in the brain. The most common of these infections are bacterial meningitis and encephalitis, which can be caused by bacteria such as Neisseria meningitidis and Streptococcus pneumoniae, respectively. In rare cases, individuals infected with S. Bacteria develop psychological disorders associated with attacks from their immune system on brain cells that contain proteins resembling those on the bacteria.
The exact cause of this syndrome is not known but it is thought to be triggered by an immune response.
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