1977
DOI: 10.1099/00207713-27-4-311
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Extended Numerical Taxonomy Study of Nocardia

Abstract: Numerical classification of 80 strains received as Nocardia using six different sets of characters was carried out. A set of 57 "differentiating" characters gave six distinct clusters: Nocardia farcinica, N . asteroides A, N . asteroides B, N . caviae, N. brasiliensis, and Gordona lentifragmenta (formerly, N . rubra) . Hence, the strains received as N. asteroides were divided into three subgroups, N . farcinica, N . asteroides A, and N . asteroides B. The cluster of G. lentifragmenta was placed apart from the … Show more

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Cited by 31 publications
(28 citation statements)
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“…Since test strains were restricted to slowly growing mycobacteria, characters useful only for differentiating among rapidly growing mycobacteria were omitted. It was shown previously that the inclusion of linked characters reduces the number of clusters (21). Therefore, characters considered as linked were not used whenever possible.…”
Section: Methodsmentioning
confidence: 99%
“…Since test strains were restricted to slowly growing mycobacteria, characters useful only for differentiating among rapidly growing mycobacteria were omitted. It was shown previously that the inclusion of linked characters reduces the number of clusters (21). Therefore, characters considered as linked were not used whenever possible.…”
Section: Methodsmentioning
confidence: 99%
“…However, this identification method does not differentiate the N. asteroides complex from the nonpathogenic Nocardia species Nocardia camea, Nocardia amarae, and Nocardia brevicatena or from species of the related genera Mycobacterium, Rhodococcus, Gordona, and Tsukamurella. In the past, the use of these few biochemical tests and morphology alone resulted in the genus Nocardia being characterized by extreme heterogeneity (196,201,203,335,512,598). In particular, the consistency and composition of the growth medium can affect the growth and stability of both aerial and substrate hyphae.…”
Section: Nocardia Speciesmentioning
confidence: 99%
“…infections. The heterogeneity within the species N. asteroides has been well documented by numerical phenetic (196,204,431,512,596,598), genetic (174,402), and immunologic (365,449,472) (518). Also, as suggested for N. farcinica infections, infections with N. nova may be more common than is presently suspected; however, the successful detection of these newly recognized species of microorganisms is dependent upon the performance of appropriate isolation and characterization techniques (621 (510).…”
Section: Epidemiologic Aspects Of Infection In Humansmentioning
confidence: 99%
“…, and Tsukamura (19) in numerical phenetic analysis. All of these investigators supported the distinctness of the N. farcinica cluster (or Tsukamura's Kyoto-I group).…”
mentioning
confidence: 99%
“…The methods of identification were described previously (19). Two reference strains were used, strain 23102 (ATCC 3318) offarcinica and strain 23094 (R-399, ATCC 23824) of N. asteroides in senso stricto.…”
mentioning
confidence: 99%