What are the Most Common Bacteria Isolated from Nontraumatic Brain

Question

What are the most common bacteria isolated from nontraumatic brain abscesses?
A) Staphylococcus
B) Enteric gram-negative rods
C) Streptococcus
D) Clostridium

Accepted Answer

Streptococcus species, particularly S. milleri, are the most common bacteria isolated from nontraumatic brain abscesses. Other common organisms include anaerobic bacteria such as Bacteroides and Fusobacterium species. Staphylococcus and Enteric gram-negative rods are not typically associated with brain abscesses, while Clostridium is a rare cause.