Encephalitis and brain abscess

Question 1

Encephalitis

Answer 1

most often caused by viruses

Mycoplasma pneumoniae
HSV-1
Acanthamoeba spp.
Taenia solium
Toxoplasma gondii
Plasmodium falciparum

Question 2

brain abscesses

Answer 2

Anaerobes:
Prevotella melaninogenica
Bacteriodes spp
Fuspbacterium nucleatum
Cutibacterium acnes

Aerobic:
S. aureus
S. pneumoniae
Enterobacterales
Nocardia
Viridians Strep - polymicrobial infection

this may occur due to bacteremia, infective endocarditis, or extension from the infection in a nearby sinus (middle ear,sinus)