Delineation of Nocardia farcinica by Delayed Type Skin Reactions on Guinea Pigs

Magnusson, M.; Mariat, F.

doi:10.1099/00221287-51-1-151

Cited by 40 publications

(31 citation statements)

References 6 publications

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“…Rejection of this name was proposed, and the reason of the rejection was already stated (35). The taxon Kyoto-I group was defined by Tsukamura in 1969 (23), and the distinctness of the taxon Kyoto-I group was supported by many investigators (3,4,8,13,14,17,19,21,29,38). The distinctness of the taxon was shown also in the present study (Figs.…”

Section: Nocardia Paratuberculosis Sp Nov Tsukamurasupporting

confidence: 69%

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Numerical Analysis of the Taxonomy of Nocardiae and Rhodococci

Tsukamura

1982

Microbiology and Immunology

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The genera Nocardia and Rhodococcus were clearly differentiated in the present study. Eleven characteristics were shown to be useful for differentiation between these two genera. Nocardia asteroides sunsu stricto previously defined by Tsukamura was divided into two taxa. One contained the type strain and was considered to retain the name Nocardia asteroides in a new sense. Another was named in the present study as Nocardia nova sp. nov. Tsukamura. The type strain of this species is ATCC 33726. The following seven characters were useful for differentiating N. nova from newly defined N. asteroides: 1) arylsulfatase activity after 14 days; 2) catalase activity (semiquantitative); 3) β‐esterase activity; 4) pyrazinamidase activity; 5) utilization of citrate as a sole source of carbon; 6) utilization of 2,3‐butylene glycol as a sole carbon source; and 7) resistance to 5‐fluorouracil (20 μg/ml).The name Nocardia farcinica for Tsukamura's Kyoto‐I group should be rejected. This taxon has been named Nocardia paratuberculosis sp. nov. Tsukamura. The type strain is ATCC 23826.Three new species of the genus Rhodococcus were proposed: Rhodococcus aichiensis sp. nov. Tsukamura (type strain, ATCC 33611); Rhodococcus chubuensis sp. nov. Tsukamura (type strain, ATCC 33609); Rhodococcus obuensis sp. nov. Tsukamura (type strain, ATCC 33610).

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Section: Nocardia Paratuberculosis Sp Nov Tsukamurasupporting

confidence: 69%

“…It contained also one strain (No. 140) from Goodfellow received as N. farcinica (cluster 11) (14) and three strains (Nos. 151, 155, and 156) received from Goodfellow as members of N. asteroides, cluster 9 (19).…”

Section: Resultsmentioning

confidence: 99%

Numerical Analysis of the Taxonomy of Nocardiae and Rhodococci

Tsukamura

1982

Microbiology and Immunology

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“…farcinica was once identified as N. asteroides [5,8], but later it was differentiated from N. asteroides by both serological [15] and numerical [26] analyses. Recently, Lechevalier et al [14] reported that N. farcinica contained mycolic acid as did the Mycobacterium and hence it should be transferred to the genus Mycobacterium.…”

Section: Methodsmentioning

confidence: 99%

A Further Numerical Taxonomic Study of the Rhodochrous Group

Tsukamura

1974

Japanese Journal of Microbiology

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A computer taxonomy was carried out as an aid to clarify the relationships between the genera Mycobacterium, and Nocardia as well as the 'Rhodochrous' group. The last group contained slightly acidfast organisms isolated from sputa and soil and also included strains received as "Mycobacterium rhodochrous." The group had been proposed as the genus Gordona by the present author. The rhodochrous group formed a cluster at the 87% similarity level and was clearly separated from all strains of the genera Mycobacterium and Nocardia. The cluster of the rhodochrous group was divided into seven subclusters at the 90% similarity level, and six of the seven corresponded to six species of the genus Gordona : G. bronchialis; G. rubropertincta (synonym G. rubra); G. terrae; G. aurantiaca; G. rhodochroa ; G. rosea. If one accepts the concept that a phenetically well-defined cluster is a species, each of the subclusters of the rhodochrous group should be regarded as a species and the entire group as a genus. Discrepancies between the results of numerical classification and the results of lipid analyses remain as a problem to be solved in the future.

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“…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%

The medically important aerobic actinomycetes: epidemiology and microbiology

1994

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The aerobic actinomycetes are soil-inhabiting microorganisms that occur worldwide. In 1888, Nocard first recognized the pathogenic potential of this group of microorganisms. Since then, several aerobic actinomycetes have been a major source of interest for the commercial drug industry and have proved to be extremely useful microorganisms for producing novel antimicrobial agents. They have also been well known as potential veterinary pathogens affecting many different animal species. The medically important aerobic actinomycetes may cause significant morbidity and mortality, in particular in highly susceptible severely immunocompromised patients, including transplant recipients and patients infected with human immunodeficiency virus. However, the diagnosis of these infections may be difficult, and effective antimicrobial therapy may be complicated by antimicrobial resistance. The taxonomy of these microorganisms has been problematic. In recent revisions of their classification, new pathogenic species have been recognized. The development of additional and more reliable diagnostic tests and of a standardized method for antimicrobial susceptibility testing and the application of molecular techniques for the diagnosis and subtyping of these microorganisms are needed to better diagnose and treat infected patients and to identify effective control measures for these unusual pathogens. We review the epidemiology and microbiology of the major medically important aerobic actinomycetes.

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Delineation of Nocardia farcinica by Delayed Type Skin Reactions on Guinea Pigs

Cited by 40 publications

References 6 publications

Numerical Analysis of the Taxonomy of Nocardiae and Rhodococci

Numerical Analysis of the Taxonomy of Nocardiae and Rhodococci

A Further Numerical Taxonomic Study of the Rhodochrous Group

The medically important aerobic actinomycetes: epidemiology and microbiology

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