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To the Editor:—In 1912 I exhibited at the seventh International Congress of Dermatology at Rome a moulage depicting an impetiginous eruption on the face. There were five circinate lesions of different sizes. Scrapings from each of these lesions when examined microscopically showed the presence of Demodicidae in numbers. I showed some of these slides to Dr. Crawford Mollison, patholo- gist to the Melbourne Hospital and to the late Dr. Bull, lecturer on bacteriology at Melbourne University. They both expressed the opinion that they could not see how parasites so large could exist in such numbers in the skin without producing a marked inflammatory condition. In this case the lesions were unilaterally placed, on the right side. Scrapings from the skin between the lesions showed no evidence of the parasites.
Since that time I have written several papers on the pathogenicity of Demodex folliculorum in man (M. J. Australia
Lawrence H. PATHOGENICITY OF DEMODEX FOLLICULORUM IN MAN. Arch Derm Syphilol. 1935;32(4):633–634. doi:10.1001/archderm.1935.01470040090021
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