Microbiology A “parasite” that may be a fungus is the initial clinical manifestation in up to 60% of patients with AIDS. This organism is A Cryptosporidium B Microsporidium C Blastocystis D Pneumocystis 💡 Explanation A "parasite" that may be a fungus is the initial clinical manifestation in up to 60% of patients with AIDS. This organism is ✓ Correct Answer: D. Pneumocystis