Immunization against dental caries.
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Biomedical subjects
Publications and source records attributed to G Colman.
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A dipthericin typing scheme has been constructed using 441 strains of Corynebacterium diptheriae isolated in eastern Australia from 1962 to 1971. Ten types have been distinguished using seven strains of C. diphtheriae and two strains of C. belfanti as indicators of the diphthericins produced by the newly isolated strains. Strains grouped into types L2, L3 and L3a were found only in Melbourne and types L1 and L4 were predominant in Sydney. Type L5 strains were isolated intermittently throughout the period of study and were found in all eastern states. Numerical analysis of the characteristics of the strains suggests that associations exist between, on the one hand, diphthericin type and, on the other hand, bacteriophage type, serotype and biochemical activity.
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Ten strains of Gram-positive cocci isolated from patients with endocarditis and other infections, though resembling enterococci, proved to belong to the Aerococcus-Pediococcus-Gaffkya group of bacteria.
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A supplemented, infusion-based medium that supports the growth of most oral Actinomycetaceae is described. The inclusion of Naf and colistin sulfate enabled actinomyces to be isolated from dental plaque in the presence of few other oral microorganisms.