1887

Abstract

Numerical classification of 80 strains received as using six different sets of characters was carried out. A set of 57 “differentiating” characters gave six distinct clusters: B, , and (formerly, ). Hence, the strains received as were divided into three subgroups, A, and B. The cluster of was placed apart from the others, and a previous classification of this taxon as a species of was supported by the present study. The problem of a minimum number of differentiating characters necessary for numerical classification, which was considered theoretically as above 40 or 50, was studied experimentally in this study. The results supported the theoretical considerations. Inclusion of linked characters reduced the number of clusters.

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1977-10-01
2024-12-04
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References

  1. Berd D. 1973; Nocardia asteroides. A taxonomic study with clinical correlations. Am. Rev. Respir. Dis. 108:909–917
    [Google Scholar]
  2. Bradley S. G. 1973; Relationships among mycobacteria and nocardiae based upon deoxyribonucleic acid reassociation. J. Bacteriol. 113:645–651
    [Google Scholar]
  3. Cerbón J. 1967; Taxonomic analysis of Nocardia. Rev. Latinoam. Microbiol. Parasitol. 9:65–68
    [Google Scholar]
  4. Franklin A. A. Jr., McClung N. M. 1976; Heterogeneity among Nocardia asteroides strains. J. Gen. Appl. Microbiol. 22:151–159
    [Google Scholar]
  5. Goodfellow M. 1971; Numerical taxonomy of some nocardioform bacteria. J. Gen. Microbiol. 69:33–80
    [Google Scholar]
  6. Gordon R. E., Mihm J. M. 1957; A comparative study of some strains received as nocardiae. J. Bacteriol. 73:15–27
    [Google Scholar]
  7. Gordon R. E., Mihm J. M. 1959; A comparison of Nocaria asteroides and Nocardia brasiliensis. J. Gen. Microbiol. 20:129–135
    [Google Scholar]
  8. Gordon R. E., Mihm J. M. 1962; The type species of the genus Nocardia. J. Gen. Microbiol. 27:1–10
    [Google Scholar]
  9. Gordon R. E., Mihm J. M. 1962; Identification of Nocardia caviae (Erikson) nov. comb. Ann. N. Y. Acad. Sci. 98:628–636
    [Google Scholar]
  10. Holm P. 1975; Seven cases of human nocardiosis caused by Nocardia farcinica. Sabouraudia 13:161–169
    [Google Scholar]
  11. Kurup P. V., Schmitt J. A. 1973; Numerical taxonomy of Nocardia. Can. J. Microbiol. 19:1035–1048
    [Google Scholar]
  12. Lechevalier M. P., Horan A. C., Lechevalier H. 1971; Lipid composition in the classification of nocardiae and mycobacteria. J. Bacteriol. 105:313–318
    [Google Scholar]
  13. Lockhart W. R. 1967; Factors affecting reproducibility of numerical classifications. J. Bacteriol. 94:826–831
    [Google Scholar]
  14. Magnusson M., Mariat F. 1968; Delineation of Nocardia farcinica by delayed type skin reactions on guinea pigs. J. Gen. Microbiol. 51:151–158
    [Google Scholar]
  15. Ridell M., Norlin M. 1973; Serological study of Nocardia by using mycobacterial precipitation reference systems. J. Bacteriol. 113:1–7
    [Google Scholar]
  16. Sneath P. H. A. 1964; New approaches to bacterial taxonomy: use of computers. Annu. Rev. Microbiol. 18:335–346
    [Google Scholar]
  17. Sneath P. H. A. 1972 Computer taxonomy. 29–98 Norris J. R., Ribbons D. W.ed Methods in microbiology Academic Press Inc.; London:
    [Google Scholar]
  18. Sokal R., Sneath P. H. A. 1963 Principles of numerical taxonomy. W. H. Freeman and Co.; San Francisco:
    [Google Scholar]
  19. Tsukamura M. 1966; Adansonian classification of mycobacteria. J. Gen. Microbiol. 45:253–273
    [Google Scholar]
  20. Tsukamura M. 1967; Identification of mycobacteria. Tubercle 48:311–338
    [Google Scholar]
  21. Tsukamura M. 1969; Identification of group II scotochromogens and group III nonphotochromogens of mycobacteria. Tubercle 50:51–60
    [Google Scholar]
  22. Tsukamura M. 1969; Numerical taxonomy of the genus Nocardia. J. Gen. Microbiol. 56:265–287
    [Google Scholar]
  23. Tsukamura M. 1975; Numerical analysis of the relationship between Mycobacterium, rhodochrous group, and Nocardia by use of hypothetical median organisms. Int. J. Syst. Bacteriol. 25:329–335
    [Google Scholar]
  24. Tsukamura M. 1976; Numerical classification of slowly growing mycobacteria. Int. J. Syst. Bacteriol. 26:409–420
    [Google Scholar]
  25. Tsukamura M. 1976; Conditions for normal distribution of matching coefficients involved in a cluster in numerical classification. Jpn. J. Micribiol. 20:357–359
    [Google Scholar]
  26. Tsukamura M., Mizuno S., Murata H. 1975; Numerical taxonomy study of the taxonomic position of Nocardia. rubra reclassified as Gordona lentifragmenta Tsukamura nom.nov. Int. J. Syst. Bacteriol. 25:377–382
    [Google Scholar]
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