A clinical and mycological study of onychomycosis in HIV infection.

Background: Onychomycosis is one of the early manifestations of HIV infection with a prevalence of 15-40%. Multiple nail involvement, isolation of both common and rare species and resistance to treatment are the characteristics of onychomycosis in HIV.

Aim: To study the epidemiology, clinical manifestations of onychomycosis in HIV-infected individuals and to identify the various causative fungi microbiologically.

Methods: A total of 250 HIV infected patients, diagnosed by ELISA, were screened for nail involvement; of which 60 patients i.e, 40 males and 20 females, who had clinically suspected untreated fungal infection were included in this study.

Results: Of the 60 respondents, 34 (56.66%) were from the 31-40 years age group. Amongst the 40 males, there were 20 manual laborers and 14 farmers; while 18 of 20 females were housewives. Toenail involvement was seen in 38 patients (63.33%), fingernail in 12 patients (20%) while 10 (16.66%) patients had involvement of both. Twenty eight (46.66%) patients gave history of some trauma, 6 (10%) had diabetes mellitus and only 1 patient (1.66%) had history of peripheral vascular disease. Nineteen (31.66%) patients had associated tinea pedis, 5 (8.33%) had tinea manuum, 10 (16.66%) had tinea corporis and 7 (11.66%) had tinea cruris. Twenty one (35%) respondents had distal and lateral superficial onychomycosis (DLSO), 5 (8.33%) had proximal subungual onychomycosis (PSO), 1 (1.66%) had superficial white onychomycosis (SWO), while 33 (55%) had total dystrophic onychomycosis (TDO). Fungal elements were demonstrated by KOH mount in 49 patients (81.66%) and growth was seen in 32 (53.33%) cultures. Dermatophytes were isolated in 13 (21.66%) and nondermatophytic molds (NDM) in 19 (31.66%). Out of the 13 positive dermatophyte cultures, Trichophyton rubrum was isolated on 11 and Trichophyton mentagrophytes on 2 cultures. Of the 19 non-dermatophytic cultures, Aspergillus niger was isolated on 3 and Candida spp. on 12 while Cladosporium spp, Scytalidium hyalinum, Penicillium spp. and Gymnoascus dankaliensis on 1 each.

Conclusions: Total dystrophic onychomycosis was the most common clinical type and NDM were the predominant causative organisms.