GSTM1 and anemia (phenotype): A total of 61 SM cases were identified, 19 (31.1%), 15 (24.5%), and 8 (13.1%) of whom presented at the hospital with respiratory distress (deep breathing or chest indrawing), impaired consciousness (BCS < 5), and severe malaria anemia (SMA) (Hb < 5g/dl), respectively.