A comparative taxonomic study on two forms of Candida parapsilosis (Ashford) Langeron et Talice.

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Abstract
A comparative study was made on 2 forms of C. parapsilosis. From the reciprocal absorption experiment of antiserum for heated cells of these yeasts and gel diffusion precipitation of mannans, the 2 forms were assumed to possess a small amount of specific antigens and antigens common to both. Factor antiserum 24 prepared from antiserum for Saccharomyces rosei agglutinated C. parapsilosis form I but not form II and was considered useful for clear-cut discrimination of the 2 forms. Proton magnetic resonance spectrum of mannans demonstrated the difference of the 2 forms. C. parapsilosis assimilated L-arabinose, did not excrete excess amount of riboflavin into synthetic media and did not require thiamine. Since C. parapsilosis form II corresponded to the imperfect form of Lodderomyces elongisporus, these characteristics are useful for the discrimination of the imperfect form of L. elongisporus from C. parapsilosis.

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