[A case of chronic actinomycosis in a carcinomatous lesion].

A gram positive, catalase-positive Actinomyces viscosus strain has been isolated from cervicofascial carcinomatous lesion. Identification of this human strain of Actinomyces viscosus was carried out with biochemical tests. Tests for catalase, indole, nitrate reduction, methyl red reaction acetoin (VP) and gelatin hydrolysis were done by the procedure recommended by the technique described by Grencser and Slack. Carbohydrate fermentation tests were done with three basal media: Actinomyces fermentation broth, a thioglycolate fermentation base and a brain-heart infusion broth.