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  • Title: TRANSFORMATION OF MYCELIAL AND YEAST FORMS OF PARACOCCIDIOIDES BRASILIENSIS IN CULTURES AND IN EXPERIMENTAL INOCULATIONS.
    Author: CARBONELL LM, RODRIGUEZ J.
    Journal: J Bacteriol; 1965 Aug; 90(2):504-10. PubMed ID: 14329466.
    Abstract:
    Carbonell, Luis M. (Instituto Venezolano de Investigaciones Científicas, Caracas, Venezuela), and Joaquín Rodríguez. Transformation of mycelial and yeast forms of Paracoccidioides brasiliensis in cultures and in experimental inoculations. J. Bacteriol. 90:504-510. 1965.-Experimental transformations of mycelial to yeast and yeast to mycelial forms in culture, and mycelial to yeast forms in tissue, were studied. All the transitional forms that appeared in culture were also seen in tissue, but in fewer number. Most of the hyphae in culture were transformed into yeast, but only a few in tissue. Yeast appeared in testicle around the 3rd day after inoculation, but on the 10th day in subcutaneous tissue. Pathogenicity of mycelium was high, since yeast was found in almost all of the organs inoculated with mycelium. Histologically, an acute inflammation occurred first, owing to the inoculation of mycelium, followed by a giant-cell granuloma with abundant hyphae detritus. These giant cells almost disappeared about 10 days after inoculation, giving place to a second giant-cell granuloma with yeast forms.
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