Identification of dematophyte causing Tinea cruris and Tinea genitalis by culture, biochemical and morphological characteristics in 130 cases during past six months, from February1 to July30, 2016. Patients suffering from tinea cruris or tinea genitalis were scraped from the affected area after cleaning the part with 70% alcohol. Potassium hydroxide mounts (KOH 20%) were prepared for microscopy to see the fungal elements. Cultures were set up to study the morphological characteristics and for performing the biochemical tests and in vitro hair perforation test. All one hundred and thirty isolates were positive for microscopy and culture and were identified as Trichophyton interdigitale (former Trichophyton mentagrophyte) T. interdigitale was found to be the only species responsible for all the cases of tinea infection. More males were affected than females.  Few single females were suffering from the tinea infection. Most of the married females, who had Tinea cruris or Tinea genitalis, gave the history of their spouses having acquired the infection first. Some single males who had Tinea genitalis, gave the history of having had sex with commercial sex worker. Two male patients gave the history of sharing the loincloth for wrestling. Few patients also had tinea corporis and tinea faciei. To avoid the spread of infection, it is important to identify the pathogen and start the treatment at the earliest.

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