Pharmacology Prophylactic therapy should be started against Pneumocystis carinii pneumonia in AIDS patients with CD4 counts below : A < 50/microL B < 150/ microL C < 200/ microL D < 400/ microL 💡 Explanation Prophylactic therapy should be started against Pneumocystis carinii pneumonia in AIDS patients with CD4 counts below : ✓ Correct Answer: C. < 200/ microL