Effect of tobacco smoking on total and differential white blood cell
counts was studied on 100 Calabar subjects. Total white cell count was
carried out using improved Neubauer counting chamber method while
leukocyte differentials was by microscopic examination of leishman
stained thin blood film of Dacie and Lewis. Subjects were randomly
selected and were all males, aged 20 to 35 years. Medical history of the
smokers was obtained through the use of questionnaires to exclude
subjects with diseases that could alter the leukocyte count. Smokers
were classified as heavy, moderate and occasional smokers. Twenty
subjects smoked at least 10 sticks of cigarette and above per day were
classified as heavy smokers while those that smoked 5-10 and 1-5 sticks
per day were classified as moderate and occasional smokers respectively.
Total white cells and neutrophil counts were significantly higher (p
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