Neutrophil count and myeloperoxidase activity in Indian bidi smokers.

Myeloperoxidase (MPO) level and MPO scoring were estimated in Indian bidi smokers and compared with those in cigarette smokers and non-smokers. The values were higher in the neutrophils of 20 bidi smokers compared to 20 age-matched non-smokers (p < 0.001). However, they were similar to those in 20 cigarette smokers. No correlation of MPO activity was observed with blood carboxyhaemoglobin levels and smoking indices except in bidi smokers. Total leucocyte count and total neutrophil counts were also higher in bidi and cigarette smokers. This increased MPO activity in the neutrophils of bidi and cigarette smokers may contribute to the greater risk of obstructive pulmonary disease.