Microbiology The most common organism among the following that causes acute meningitis in an AIDS patient is A Streptococcus pneumoniae B Streptococcus agalactiae C Cryptococcus neoformans D Listeria monocytogenes 💡 Explanation The most common organism among the following that causes acute meningitis in an AIDS patient is ✓ Correct Answer: C. Cryptococcus neoformans