Final full-text version of the paper available at: http://dx.doi.org/10.1128/JCM.42.12.5957-5960.2004.A Streptomyces albus forearm actinomycetoma that could not be identified by culture was properly identified at the species level by study of an internal fragment of the heat shock protein gene, comparative sequence analysis of 16S ribosomal DNA (rDNA), and the hypervariable γ-region of the 16S rDNA.This work was in part financed by the project FICYT PB-MED-09-04. A.M.F. is an FP2000-6023 grant of the Spanish Ministry de Ciencia y Tecnología.Peer reviewed