Efficacy of 5% permethrin-2% fusidic acid cream compared to 5% permethrin-placebo in the treatment of impetiginized scabies.

INTRODUCTION

Scabies is caused by Sarcoptes scabiei var hominis, often causing secondary bacterial infections, especially by Streptococcus pyogenes and Staphylococcus aureus. Permethrin 5% cream is the first-line of treatment that is recommended, combined with Fusidic acid 2% cream as the first-line topical antibiotic. We investigated the efficacy of a combination of permethrin 5% cream and fusidic acid 2% cream for the treatment of impetiginized scabies.

METHODOLOGY: A double-blind, randomized clinical trial was organized at two Islamic boarding schools in Bogor, West Java, Indonesia. Forty subjects were randomly allocated into the intervention group (permethrin 5% and fusidic acid 2%; n = 20), and the control group (permethrin 5% and placebo; n = 20). Treatment efficacy was determined through the visual analogue scale (VAS) for pruritus and pain, and by examining bacterial cultures.

RESULTS

Treatment efficacy in the intervention group was higher than in the control group on day 7 (80% vs. 35%) and day 14 (95% vs 35%, p ≤ 0.001, RR 2.714) with decreasing VAS for pruritus (p = 0.04) and pain (p = 0.035). The most common bacterium was Staphylococcus aureus. Some minor adverse effects such as itch and heat occurred temporarily.

CONCLUSIONS

Treating impetiginized scabies with permethrin 5% and fusidic acid 2% cream is more effective than treating with only 5% premethrin. The most common bacterium causing secondary infection in impetiginized scabies is Staphylococcus aureus.