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