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Biomedical subjects

E Drouhet

Publications and source records attributed to E Drouhet.

At least 73 records · Page 4Linked to original sources
PubMed1976

Susceptibility and resistance of Candida to 5-fluorocytosine in relation to the cell wall ultrastructure.

Studies on the susceptibility of Candida albicans to 5-fluorocytosine (5FC) demonstrated a high rate of resistance (85%) for serogroup B strains, more frequently isolated in Africa, and a low incidence (<1%) for serogroup A, predominating among Whites (Drouhet et al., 1974). Determination of the electrophoretic mobility of various strains did not provide a correlation between the charged groups of the surface and their phenotype to 5FC and antigenic groups. Adsorption of the surface antigens with a hyperimmune antiserum did not modify the phenotypic expression of Candida to 5FC. Electron microscopy studies revealed that susceptible strains had an additional granular layer dividing the inner stratum into two parts. After trypsin digestion of these strains, the disappearance of this layer was concomitantly associated with the emergence of resistance. Thus, it appears that the cell wall contains a proteinic material, which is located in the interior of the electron-transparent region and acts in the metabolism of 5FC.

Animals↗
PubMed1976

[Fungal and parasitic infections during immunosupressive treatment (author's transl)].

Deep visceral fungus infections, induced by occasional pathogens, have caused a new class of diseases, and occupy a more and more important place among the complications due to immunosuppressive agents. The experience of the Mycology Unit of the Pasteur Institute, where recent techniques of mycological and immunological diagnosis of these fungus infections are used, is reported here. 24 patients submitted to corticosteroids and other immunosuppressive treatments, including 6 renal transplants and one liver transplant, developed deep visceral infection with septicemia due to Candida, in a series of 106 cases of deep candidiasis due to massive antibiotic treatment diagnosed over the last few years. The mycological, immunological and therapeutic data obtained after treatment with amphotericin B and 5-fluorocytosine are reported here. 8 cases of meningeal, pulmonary and bony and cutaneous cryptococcosis, occurring after corticotherapy (6 cases), radiotherapy (1 case) and renal transplantation (one case), are presented together with the favourable results (6 cures out of 8) obtained with amphotericin B and 5-fluorocytosine, eight alone or in association. The authors also report 2 cases of aspergillosis, one in the lung, occurring in a case of renal transplantation who was given, at an early stage, amphotericin B and 5-fluorocytosine, thanks to rapid laboratory diagnosis, and another case in a heart transplant with pulmonary and cerebral localisations from which the patient died. The literature on these fungus infections, together with the mucormycoses, nocardioses and other fungus and antinomycosal complications are reported, together with parasitic infections the severity of which is emphasized in renal transplants, in particular P. carinii pneumonia, toxoplasmosis, strongyloidiasis and other parasitic diseases.

Adolescent↗
PubMed1976

[Incidence of mother-child contamination by Candida albicans during labor].

Two different studies assessed that materno-fetal contamination at time of delivery is not the usual way of colonization of newborns with Candida albicans. In a first study, occurence of Candida albicans in neonate units disappeared owing to prophylactic measures, such as strict care in hospital hygiene. In a second study, detailed herein and performed in an obstetric ward, it was found that despite a rate of vaginal Candida carrier of 19 %, candidiasis in newborns was exceptional.

Candidiasis↗
PubMed1975

[Sensitivity and resistance of Candida to 5-fluorocytosine. Relationship to the cell wall ultrastructure].

The study of ultrafine sections of the yeasts of Candida show a difference in the cell between sensitive and resistant strains to 5-fluorocytosine (5-FC). The sensitive strains show a thin border of granular material inside of the clear internal layer which is absent for the majority of resistant strains. After trypsinization, the sensitive strains show a resistance which is reversible and the granular layer disappears. These data permit the conclusion that the middle layer of resistant strains is of protein nature and interferes with the metabolization of 5-FC.

Candida↗