Epidemiologic skin test survey of sensitivity to paracoccidioidin, histoplasmin and sporotrichin among gold mine workers of Morro Velho Mining, Brazil

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Abstract
Skin tests with paracoccidioidin, histoplasmin and sporotrichin were applied to 417 workers of Morro Velho Mining in the State of Minas Gerais, Brazil, with the main purpose of detecting the prevalence of paracoccidioidomycosis-infection, histoplasmosis capsulate-infection and sporotrichosis-infection. The rates of positivity to the skin tests were 13.43% for paracoccidioidin, 17.50% for histoplasmin and 13.67% for sporotrichin. Several epidemiological factors were investigated for a better interpretation of the results. Paracoccidioides brasiliensis, Histoplasma capsulatum var. capsulatum and Sporothrix schenkii were not isolated from the soil samples from the mines investigated.