## Epidemiology of Tinea Corporis in India **Key Point:** Trichophyton rubrum is the most common dermatophyte causing tinea corporis globally and in India, accounting for approximately 60–70% of cases. ### Organism Profile | Organism | Prevalence | Key Features | Geographic Pattern | | --- | --- | --- | --- | | *T. rubrum* | 60–70% | Anthropophilic, slow-growing, red pigment on media | Most common worldwide and in India | | *T. mentagrophytes* | 15–20% | Zoophilic/anthropophilic, faster growth | Common in temperate zones | | *M. canis* | 5–10% | Zoophilic (cats/dogs), fluoresces under Wood's lamp | Pet contact history | | *E. floccosum* | <5% | Anthropophilic, rare | Uncommon in India | ### Clinical Significance **High-Yield:** *T. rubrum* is: - Anthropophilic (human-to-human transmission) - Slow-growing but persistent - Produces dermatitis-type lesions (mild inflammation) - Difficult to eradicate; prone to recurrence - Responds to azoles and allylamines **Clinical Pearl:** The prevalence of *T. rubrum* increases in warm, humid climates typical of tropical India, making it the epidemiological leader in tinea corporis presentations. **Mnemonic:** **RUBRUM** = **R**ed pigment, **U**biquitous, **B**est adapted, **R**ecurrent, **U**nderground (persistent), **M**ost common. 
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