Bacterial Meningitis - Microbiology
Adults 18-34 
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Bacterial Meningitis - Microbiology

Adults 18-34 

 • S. pneumoniae (50%)

 • N. meningitidis (35%)

 • H. influenzae (7%)

 • GBS (6%)

 • Listeria (2%)

Adults 35-49 

 • S. pneumoniae (75%)

 • N. meningitidis (10%)

 • GBS (7%)

 • H. influenzae (5%)

 • Listeria (3%)

Adults >50

 • S. pneumoniae (76%)

 • GBS (8%), Listeria (7%),

 • H. influenzae (6%)

 • N. meningitidis (5%)

 • Aerobic gram neg bacilli

Nosocomial (intracranial procedure, >48 hrs, in hospital, head trauma)

 • Gram neg bacilli (40%)

 • S.aureus (10%)

 • Coag neg Staph (10%)

 • P. acnes takes 10 days to grow!



#Bacterial #Meningitis #Microbiology #differential #diagnosis 
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Account created for the MGH Internal Medicine Housestaff Manual "White Book" - https://stk10.github.io/MGH-Docs/WhiteBook-2019-2020.pdf
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