The second cycle of azacitidine was given at 100% dose and was complicated by prolonged and profound cytopenias lasting over four weeks (neutrophils 0.1 × 109/L, transfused Hb 83 g/L, and transfused PLTS 2 × 109/L) and Pseudomonas bacteremia. Aspergillus infection and atypical mycobacterial infection were suspected but not proven. Here, GSTM1 is linked to bacterial infectious disease with sepsis.