Classification of Rapidly Growing Mycobacteria

Tsukamura, M; Matsumoto, Shoji; Tsukamura, S

doi:10.1111/j.1348-0421.1968.tb00379.x

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…z g , h) obtained a relatively low intrataxon matching score, reflecting an inordinately high intrataxon noise level for cluster 3. The observations from these two laboratories might support an earlier report (Tsukamura et al 1968) that M. vaccae and M. parafortuitum are two distinct taxa. To resolve this problem a larger assemblage of strains, representative of these two groups, has been included in a current IWGMT study.…”

Section: Discussionsupporting

confidence: 86%

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A Co-operative Numerical Analysis of Rapidly Growing Mycobacteria

Kubica

Baess

Gordon

et al. 1972

Journal of General Microbiology

146

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SUMMARYA co-operative numerical taxonomic analysis of rapidly growing mycobacteria of Runyon's group IV is reported. There was no limitation on the number, nature, or method of performance of the test characters contributed by each of the 12 participants. Initially 415 test characters were coded for analysis; deletion of irrelevant and repetitious data resulted in a final 195 characters used to generate the matching matrix. All nine major clusters defined in the study were of named species; however, three of these were noted to contain two or more species and the reduction of some of these to synonymy with prior epithets is discussed.

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Section: Discussionsupporting

confidence: 86%

“…Although these two taxa have been reported to be distinct (Tsukamura, Mizuno & Tsukamura, 1968), neither the pooled data nor the results of any individual investigator were clearly able to separate them when the organisms were treated as unknowns. The type strains of M .…”

Section: Figurementioning

confidence: 92%

A Co-operative Numerical Analysis of Rapidly Growing Mycobacteria

Kubica

Baess

Gordon

et al. 1972

Journal of General Microbiology

146

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“…borstelense is identical with M. abscessus and M . runyonii is, however, at variance with the views of Tsukamura, Mizuno &z Tsukamura (1968) who consider it to be a separate species. Although M. friedmannii differs taxonomically from M .…”

Section: Discussioncontrasting

confidence: 58%

Bacteriological and Serological Studies of Fast Growing Mycobacteria Identified as Mycobacterium friedmannii

Stanford

Beck

1969

Journal of General Microbiology

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SUMMARYThree recently isolated strains of a fast growing non-pigmented mycobacterium, two of which were from a series of injection abscesses and one which was recovered from a water tank, have been compared bacteriologically and serologically in gel-diffusion tests with a number of mycobacterial type strains. The three strains and type strains of M. abscessus, M. runyonii, M. borstelense and M. friedmannii were of one species. This species differed in several respects from M . ranae (fortuitum), M. smegmatis and M . thamnopheos. In view of the chronological priority of M . friedmannii over the other names, we recommend that this name be adopted as the correct designation for this species. The origin of the type strain of M. friedmannii is discussed and reasons are given for its acceptance as representative of Friedmann's original strains.

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“…This fact defines a species by a 90% phenon line or as a group of strains showing a mean S-value of 90% or more to an HMO and showing a mean S-value of 89% or less to other HMOs. The results obtained in the present study are similar to the results obtained by "proper" numerical classification [41,47,49,51] with a few discrepancies. In previous studies, M. abscessus, M. aurum and M. lacticola had been recognized as subspecies of M. fortuitum, M. arafortuitum and M. smegmatis, respectively.…”

Section: Dendrogram Of the Species Of Genus Mycobacteriumsupporting

confidence: 81%

“Hypothetical Mean Organisms” of Mycobacteria

Tsukamura

Matsumoto

1968

Japanese Journal of Microbiology

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Seven hundred fifty-four strains of mycobacteria were examined using 97 characters , and a "Hypothetical Mean Organism" (HMO) was prepared for each species using numerical classification. The species could be defined as a group of strains showing a mean S-value of 90% or more to a HMO and showing mean S-values of 89% or less to other HMOs. The following species were recognized: (1) (15) M. smegmatis. Dendrogram of the species showed two main stems, indicating that the genus Mycobacterium be divided into two subgenera, subgenus Mycobacterium (from M. tuberculosis to M. chitae) and subgenus Mycomycobacterium (from M. borstelense to M. smeginatis). Some discrepancy was noted between the results of numerical classification using HMOs and that of the "proper" numerical classification, and this discrepancy is discussed. In 1963, Liston, Wiebe and Colwell [22] proposed to characterize the bacterial species by a "Hypothetical Median Organism" (HMedO). The HMedO is useful to identify unknown strains, and it is desired to define "typical" strains for e very species. The typical strains (strains most similar to the HMedOs) will serve as reference strains. The purpose of this study is to present HMedOs of several mycobacterial species and, using them to examine problems in the classification of mycobacteria. Numerical classification methods intro MATERIALS AND METHODSThe strains used were composed of 754 371

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Classification of Rapidly Growing Mycobacteria

Cited by 20 publications

References 15 publications

A Co-operative Numerical Analysis of Rapidly Growing Mycobacteria

A Co-operative Numerical Analysis of Rapidly Growing Mycobacteria

Bacteriological and Serological Studies of Fast Growing Mycobacteria Identified as Mycobacterium friedmannii

“Hypothetical Mean Organisms” of Mycobacteria

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