Infectious workup with streptococcal and legionella urine antigens, beta-d-glucan, fungal serology, quantiferon, HIV viral load, CD4 count, sputum with AFB stain x3, as well as Pneumocystis jirovecii pneumonia (PJP) stain on sputum and blood cultures were all negative. This evidence concerns the gene CD4 and pneumocystosis.