Generic Name for Imperfect Yeasts, Cryptococcus or Torulopsis

Skinner, Charles E.

doi:10.2307/2421894

Cited by 20 publications

(5 citation statements)

References 2 publications

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“…The ability of some yeasts to produce from glucose polysaccharides which give a blue test with iodine was described by Aschner and associates (1945). The studies reported herein were nearly completed before the appearance of the Lodder and Kreger-van Rij (1952) book, and the writers had come independently to the conclusion that "starch" synthesis rather than capsule production as Almeida and associates (1941) had suggested, or fermentation as suggested by Skinner (1950), probably would be the best single character to separate Cryptococcus from Torulopsis. Personal communication from Lodder had given an indication that she was using this character, and the writers were ready to accept it before the appearance of her book.…”

Section: Resultsmentioning

confidence: 87%

The External Surface of the Human Body as a Habitat for Nonfermenting Nonpigmented Yeasts

Connell

Skinner

1953

J Bacteriol

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Section: Resultsmentioning

confidence: 87%

The External Surface of the Human Body as a Habitat for Nonfermenting Nonpigmented Yeasts

Connell

Skinner

1953

J Bacteriol

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“…Just as in many species, Candida is the rough form of Cryptococcus which is admitted to be derived from the perfect genus Saccharomyces, at least as far as the fermenting species are concerned (20), so is the pellicle producing Candida Krusei the somewhat more dissociated form of Mycoderma cerevisiae, which is likewise derived from the perfect genus Pichia or Hansenula. This very close connection between Mycoderma and Candida Krusei has been clearly pointed out (10, I1).…”

Section: Discussionmentioning

confidence: 99%

“…2) Whether Cryptococcus or Torulopsis (or both generic names) is valid is a question that is still undecided, and both names are in current use (20). in any of several separate isolates, and LANGERON and WICKERHAM, in personal communications, also say that they are in no way convinced that Cryptococcus pulcherrimus produces ascospores, and interpret ROBERTS' findings differently than she did.…”

Section: (1511951)mentioning

confidence: 99%

The origin of some species of the genus Candida in non-pseudomycelium-producing anascosporogenous yeasts

Connell

Skinner

1951

Mycopathologia et Mycologia Applicata

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“…C. laurentii was first identified from palm wine in the Congo by Kufferath in 1920 as Torula laurentii [6] . This isolate was then reclassified as Torulopsis laurentii [7] and renamed in 1950 as Cryptococcus laurentii (CBS 139) [8] . Later in Japan, an isolate with identical phenotypic characteristics was described as Torula flavescens [9] , reclassified in 1922 as Torulopsis flavescens [7] , and then renamed as Cryptococcus flavescens (CBS 942) [8] .…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Analysis of Phenotypically Characterized Cryptococcus laurentii Isolates Reveals High Frequency of Cryptic Species

et al. 2014

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BackgroundAlthough Cryptococcus laurentii has been considered saprophytic and its taxonomy is still being described, several cases of human infections have already reported. This study aimed to evaluate molecular aspects of C. laurentii isolates from Brazil, Botswana, Canada, and the United States.MethodsIn this study, 100 phenotypically identified C. laurentii isolates were evaluated by sequencing the 18S nuclear ribosomal small subunit rRNA gene (18S-SSU), D1/D2 region of 28S nuclear ribosomal large subunit rRNA gene (28S-LSU), and the internal transcribed spacer (ITS) of the ribosomal region.ResultsBLAST searches using 550-bp, 650-bp, and 550-bp sequenced amplicons obtained from the 18S-SSU, 28S-LSU, and the ITS region led to the identification of 75 C. laurentii strains that shared 99–100% identity with C. laurentii CBS 139. A total of nine isolates shared 99% identity with both Bullera sp. VY-68 and C. laurentii RY1. One isolate shared 99% identity with Cryptococcus rajasthanensis CBS 10406, and eight isolates shared 100% identity with Cryptococcus sp. APSS 862 according to the 28S-LSU and ITS regions and designated as Cryptococcus aspenensis sp. nov. (CBS 13867). While 16 isolates shared 99% identity with Cryptococcus flavescens CBS 942 according to the 18S-SSU sequence, only six were confirmed using the 28S-LSU and ITS region sequences. The remaining 10 shared 99% identity with Cryptococcus terrestris CBS 10810, which was recently described in Brazil. Through concatenated sequence analyses, seven sequence types in C. laurentii, three in C. flavescens, one in C. terrestris, and one in the C. aspenensis sp. nov. were identified.ConclusionsSequencing permitted the characterization of 75% of the environmental C. laurentii isolates from different geographical areas and the identification of seven haplotypes of this species. Among sequenced regions, the increased variability of the ITS region in comparison to the 18S-SSU and 28S-LSU regions reinforces its applicability as a DNA barcode.

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Generic Name for Imperfect Yeasts, Cryptococcus or Torulopsis

Cited by 20 publications

References 2 publications

The External Surface of the Human Body as a Habitat for Nonfermenting Nonpigmented Yeasts

The External Surface of the Human Body as a Habitat for Nonfermenting Nonpigmented Yeasts

The origin of some species of the genus Candida in non-pseudomycelium-producing anascosporogenous yeasts

Phylogenetic Analysis of Phenotypically Characterized Cryptococcus laurentii Isolates Reveals High Frequency of Cryptic Species

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