HIV patient (CD4<50) with diarrhea, wasting, fevers, night sweats? Diagnosis? Treatment? a) Cryptosporidium; Nitazoxanide b) Pneumocystis jirovecii; Trimethoprim-sulfamethoxazole (TMP-SMX) c) Isospora belli; Trimethoprim-sulfamethoxazole (TMP-SMX) d) Mycobacterium avium complex (MAC); Azithromycin or clarithromycin + Ethambutol