Abstract: We used pus with sclerotic cells of fungi from lesion of the patients with chromoblastomycosis due to Cladosporium carrionii to pollute bark, rotten wood, saw dust, straw, sandy-soil and loess.We found that the sclerotic cells may rapidly transform into saprophytic form on the samples.It is a mold and grows well, The symbiosis of the organism and another saprophytic fungi was seen also.Cladosporium carrionii was isolated from 26 (54.2%)samples after 28 days.The results suggest that natural environment may be contaminated by the pathogens which were eliminated from lesions of patients with chromoblastomycosis.The contamination is related to endemicity of the disease.

Key words: Chromoblastomycosis Cladosporium Environmental pollution