Bakteriologische Untersuchungen über Wunddiphtherie

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Abstract
381 swabs of wounds caused by compound fractures were taken; in 194 cases, bacteria resembling Corynebacterium diphtheriae in their morphology and their growth in Loffler serum and on Clauberg plates were present. 61 of those 194 strains were examined for their ability to ferment sucrose, Burtscher''s sucrose plate being used for this purpose. One of these 61 strains did not hydrolyze sucrose. It proved virulent for animals, and was therefore considered a true diphtheria bacillus. The other 60 strains were further studied as to their behavior towards urea, with Kleinsorgen''s plate, consisting of serum-cystine-agar with added urea, and containing cresol red as indicator. None of the 60 strains affected urea; consequently they are considered to have been nonvirulent diphtheria bacilli, belonging to the Lubinski group of paradiphtheria bacilli. Their behavior towards urea is regarded as a new property. Clinically, these paradiphtheria bacilli always appear together with streptococci, staphy-lococci, Bacterium pyocyaneum, etc. The delayed healing of wounds is attributed to such bacilli.

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