Indian Journal of Dermatology
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Year : 2008  |  Volume : 53  |  Issue : 3  |  Page : 122-124

Bacterial resistance to antibiotics in acne vulgaris: An in vitro study

1 Department of Biology, School of Sciences, Shiraz University, Shiraz, Iran
2 Department of Dermatology and Pathology, Faghihi Hospital,Shiraz, Iran
3 Gastroenterohepathology Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran

Correspondence Address:
Parvin Hassanzadeh
Department of Biology, School of Sciences, Shiraz University, Shiraz
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0019-5154.43213

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Background: Acne vulgaris is one of the most common skin disorders in youth especially during the puberty. Objective: This in vitro study was performed to determine the antibiotic resistance and sensitivity in acne vulgaris. Materials and Methods: Samples were collected from normal skin and nodulocystic and pustular skin lesions of one hundred youngsters (64 girls, 36 boys) among college students in the age range of 18-24 years old. The specimens were cultured individually on blood agar and Muller-Hinton media. The cultures were then incubated under both aerobic and anaerobic conditions for 2 to 7 days. Bacteria were identified and their resistance to common antibiotics was evaluated according to the standard procedures. Results: In aerobic culture of pustular and nodulocystic skin lesions, Staphylococcus aureus was present in 41% of subjects, Staphylococcus epidermidis in 53% and Micrococcus spp in 45% of subjucts. In anaerobic bacterial culture of pustular and nodulocystic skin lesions, Staphylococcus aureus was present in 39%, Propionibacterium acne in 33% and Staphylococcus epidermidis in 21% of subjects. The results of present study revealed that clindamycin and erythromycin were the least effective antibiotics for Propionibacterium acne while tetracycline was the least effective for Staphylococcus aureus in vitro . A synergic effect of benzoyl peroxide, erythromycin or clindamycin was noticed. Rifampin was the most effective antibiotic in vitro . Conclusion: Our results showed that rifampin was the most sensitive antibiotic in vitro for acne vulgaris. To achieve a better treatment, a combination of rifampin with other antibiotics may be more efficient. We suggest in vivo studies for better evaluation and treatment of acne patients with rifampin.

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