Abstract
A single intra-muscular injection of 1.2 millions units of benzathine penicillin every 4 weeks is the most widely used method for the antibiotic prophylaxis of rheumatic fever. The aim of this study is to evaluate the effect of long-term benzathine penicillin on DNA in patients with rheumatic fever. Thirty children with confirmed rheumatic fever who were on the benzathine penicillin prophylaxis were enrolled in the study, and 30 similar normal children served as a control group. To detect any DNA damage, SCE analysis were performed in circulating lymphocytes of the subjects. A statistically significant increased frequency of SCE was observed in children on the benzathine penicillin prophylaxis (no = 30, mean SCEs/cell +/- SD 7.54 +/- 1.81) as compared to a control group (no = 30, mean SCEs/cell +/- SD 5.82 +/- 1.40). It has been suggested that the difference in the SCE frequencies was induced by the administration of the benzathine penicillin for a long time, and further investigations are needed to confirm this toxic effect.
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