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 ORIGINAL ARTICLE
Year : 2017  |  Volume : 83  |  Issue : 3  |  Page : 326--331

Clinico-epidemiological study of tinea incognito with microbiological correlation


1 Department of Dermatology and Venereology, Fakhruddin Ali Ahmed Medical College and Hospital, Barpeta, Assam, India
2 Department of Microbiology, Fakhruddin Ali Ahmed Medical College and Hospital, Barpeta, Assam, India

Correspondence Address:
Dr. Bornali Dutta
C1, Crishna Cauvery Enclave, D Neog Path, Guwahati - 781 005, Assam
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijdvl.IJDVL_297_16

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Background: Tinea incognito is a dermatophytic infection with a clinical presentation that is modified due to previous treatment with topical or systemic steroids, as well as topical immunomodulators. It tends to mimic other dermatological conditions. Aims: To evaluate the various clinical manifestations, sites, predisposing factors and causative agents of tinea incognito. Methods: A prospective observational study was done on one hundred clinically suspected cases of tinea incognito, with a history of topical or systemic steroid use for a period of at least six weeks. They were subject to direct microscopy and fungal culture, and re-evaluated at the end of the third and sixth week. Results: Eczema-like conditions were the most common clinical manifestation, followed by inflammatory, autoimmune and infective conditions. The face was the most commonly affected site. Direct microscopy was positive in 85% of cases, and fungal culture was positive in 63% of cases. Trichophyton rubrum was the most common species isolated. Pharmacists were responsible for 78% of tinea incognito cases, and betamethasone dipropionate was the most common drug used. Limitations: As this was a hospital outpatient-based study, cases with severe systemic problems could have attended other departments. Cases involving the hair and nails were negligible. Conclusions: Tinea incognito is a commonly encountered, yet poorly reported entity in the study population. An increased level of awareness and vigilance on the sale of steroid containing compounds will help control this dermatological condition.






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