A model for testing antiseptic efficacy: a preliminary study on Betadine and Germidine.

Efficacy of povidone iodine antiseptic, betadine and germidine, was tested against normal skin flora and four pathogenic bacteria namely S. aureus, S. epidermidis, E. coli and Pseudomonas aeruginosa by a new model. The study was performed on the volar surface of forearms of ten patients. First of all, the skin flora was cultured then 10(8) cu/ml of the tested organisms was applied by a cotton swab and left to dry for 1 minute before the culture was repeated. Betadine or germidine was applied over the area previously painted with the organism. The culture was taken 1 to 2 minutes thereafter. The results showed that this model was feasible and convenient. Betadine and germidine are efficacious against normal skin flora and pathogenic bacteria.