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E Drouhet

Publications and source records attributed to E Drouhet.

At least 19 recordsLinked to original sources
PubMed1992

In vitro antifungal activity of sertaconazole.

The antifungal activity of 7-chloro-3-[1-(2,4-dichlorophenyl)-2-(1H- imidazol-1-yl)ethoxy-methyl]benzo[b]thiophene (sertaconazole, FI-7045, CAS 99592-32-2) versus miconazole has been studied in vitro against yeast-like fungi, dermatophytes and other filamentous fungi. Candida albicans was very sensitive to sertaconazole both in serotype A and serotype B strains (MIC = 0.21 micrograms/ml). Sensitivity of Candida non albicans species (MIC = 0.17 microgram/ml), Torulopsis (MIC = 0.09 microgram/ml) and Trichosporon (MIC = 0.09 microgram/ml) was also remarkable. For dermatophytes, partial inhibitions were observed at concentrations of 0.04 and 0.09 microgram/ml, the 50% inhibition ranging between 0.36 and 12.56 micrograms/ml for most strains. Filamentous opportunistic fungi were less sensitive to azoles, although sertaconazole MICs were lower than those of miconazole. Sertaconazole also proved to possess a remarkable fungicidal activity on all strains of Candida albicans under study.

Antifungal Agents↗
PubMed1990

Activity of cilofungin (LY 121019), a new lipopeptide antibiotic, on the cell wall and cytoplasmic membrane of Candida albicans. Structural modifications in scanning and transmission electron microscopy.

Cilofungin, a new biosemisynthetic analog of echinocandin B, inhibits the synthesis of beta-(1,3)-glucan resulting in severe modifications of the cell wall and cytoplasmic membrane of sensitive organisms. The morphological modifications to budding yeast cells, pseudomycelium, mycelium and germ tubes of Candida albicans were studied by scanning and transmission electron microscopy after 3 and 16 h exposure to cilofungin. Changes in yeast cell morphology were apparent after 3 h in 0.1 microgram ml-1 cilofungin but were more marked in 1 and 10 micrograms ml-1 cilofungin. Most of the yeasts failed to separate and formed aggregates. Cracks and discontinuities were present in the cell wall and the cell membrane became undulated and fractured. Inclusions into the periplasmalemma space were observed, along with a release of cellular components. An important inhibition of germ tube formation was noted and the structure of true mycelium and pseudomycelium was severely modified. The budding area of yeast cells was particularly susceptible to damage by cilofungin.

Antifungal Agents↗
PubMed1990

[Current status and trends in quality control in parasitology and mycology].

The survey of the results of the control quality in Parasitology and Mycology showed in general an improvement in the correct diagnosis for the specimen analysed (preparations of parasites, smears, stools, sera, fungal cultures). The wrong diagnosis of Ascaris lumbricoides eggs in stools diminished from 5% to 1.5%. The trichrome Gomori-Wheatley stain technic on smears in PVA was introduced. 16 reference or national standards sera for the parasitological serology, including 6 for toxoplasmosis and one for candidiasis were established. The increasing number of participants (more than 4,000) and particularly for the serology of toxoplasmosis showed the interest of the biologists for the quality of their tests.

Animals↗
PubMed1989

[Current role of deep mycoses in infectious pathology].

Deep mycoses present new aspects characterized by deep, visceral mycotic localisations and septicemia, particularly in immunocompromised conditions. In immunodepressed patients (leukaemia, transplantation), the granulopenia descending to 500 elements/ml leads not only to invasive aspergillosis and candidosis but also to infections due to opportunistic fungi exceptionally or never seen formerly. AIDS favours opportunistic fungi related to defective cellular immunity as Cryptococcus neoformans, responsible of severe meningoencephalitis and septicemia, as Candida albicans responsible of thrush and oesophagitis, but also true pathogenic fungi (Histoplasma capsulatum) becoming opportunistic in such conditions. C. albicans provokes in heroin addicts a new septicemic syndrome with cutaneous, ocular and osteoarticular lesions and in leukaemic patients hepatic micro-abscesses soon after the neutropenic phase induced by chemotherapy. New methods for immunologic diagnosis (research of circulating fungal antigen), for clinical diagnosis (scanning, magnetic resonance). New strategy of antifungal chemotherapy (itraconazole, fluconazole) allow to a better knowledge and control of this new infectious pathology.

Humans↗
PubMed1989

[Histoplasmosis and other imported mycoses in 1989].

The most common systemic mycoses imported into France are the histoplasmosis caused by H. capsulatum, which comes from Black Africa and from the French overseas departments and territories (Guyane, Martinique, Guadeloupe, New Caledonia), and the histoplasmosis caused by the larger H. duboisii, which is exclusively Central African. In recent years, histoplasmosis has become an opportunistic infection in immunocompromised patients, particularly those with AIDS. Blastomycosis, imported from North America as well as from North Africa and Central Africa, and paracoccidioidomycosis, imported from Latin America, are pulmonary mycoses with cutaneous manifestations on the face and extremities and with various deep localizations which often follow a chronic course. Coccidioidomycosis, strictly limited to the desertic regions in the western part of the American continent, is also a pulmonary mycosis with multiple granulomas in the skin, bones, lymph nodes and meninges. Penicilliosis caused by Penicillium marneffei is a mycosis from South-East Asia which has recently been observed in European AIDS patients who had travelled in that part of the world.

Africa↗
PubMed1988

Fluconazole in the management of oropharyngeal candidosis in a predominantly HIV antibody-positive group of patients.

Seventy-one patients with oropharyngeal candidosis received treatment with fluconazole given as a single 50 mg capsule once daily. Of these patients 61 were HIV-antibody positive. Candidosis had been present in nearly all patients for a least one month prior to fluconazole treatment. The duration of daily therapy was 5-20 days and in many cases this was followed by a period of maintenance treatment using 50 mg fluconazole every 48 h. In all 42 symptomatic patients, clinical resolution of the infection occurred within 7 days. Significantly, this included the disappearance of dysphagia in four patients with proven candidal oesophagitis. A marked reduction, or eradication of oral yeasts occurred concomitantly in virtually all patients. Fluconazole was well tolerated by all patients and there were no significant changes in haematological or hepatic parameters that could be attributed to the drug. The results suggest that fluconazole is an appropriate treatment for oropharyngeal candidosis and comparative studies with other agents should now be conducted.

Adult↗
PubMed1987

Mannan-specific and mannan-induced T-cell suppressive activity in patients with chronic mucocutaneous candidiasis.

We have studied T- and B-cell responses to antigens of Candida albicans in 18 patients suffering from chronic mucocutaneous candidiasis. We have shown that in vitro production of antibody to one of these antigens, mannan, was absent during the active phase of the disease and that this absence was consequent to the activation of specific CD8(+) and CD8(-) suppressor T lymphocytes. Such activation was also observed when control T lymphocytes were incubated in the presence of monocytes and a high concentration of mannan. This suppressive effect was specific to antigens of Candida albicans, was radiosensitive, and was not consequent to the secretion of prostaglandin E2. It appeared as well that the induction of these suppressor T cells was HLA-DQ restricted. The suppressor T-cell activity induced by antigens of Candida albicans in vitro is thus comparable to the suppressor T-cell activity observed in vivo in patients affected with chronic mucocutaneous candidiasis. Defective handling of mannan by monocytes could result in the accumulation of mannan, resulting in the activation of specific T suppressor cells and in the consequent cellular immunodeficiency specific to Candida albicans. Successful treatment of the candidiasis resulted in complete correction of the immune abnormalities.

Adolescent↗
PubMed1979

In vitro synergy and antagonism of antifungal agents against yeast-like fungi.

Some antifungal agents have been tested qualitatively in various associations against species of Candida, Cryptococcus and Torulopsis. The method used was the channel test and the results are confirmed by comparison with the serial dilution test in agar. The antagonism in vitro with the combination of amphotericin B imidazole suggests that caution must be exercised before prescribing the antifungal drugs in combination for man. The frequent synergy of flucytosine with econazole is, however, encouraging because of the low toxicity of the 2 drugs. Under the limited conditions described, the combination of flucytosine and amphotericin B was not found synergistic but additive on the strains of C. albicans used in this study. This combination was found synergistic for a strain of C. parapsilosis and is useful for avoiding resistance to flucytosine.

Antifungal Agents↗
PubMed1979

[Observation of a pulmonary histoplasmosis with Histoplasma capsulatum (author's transl)].

From an observation of pulmonary histoplasmosis with Histoplasma capsulatum in a Haiti woman living in France for 2 years, the authors recall the mycological and epidemiological data of this fungus as well as the main clinical radiological and biological signs of the disease. Because of its tendancy to dissemination, histoplasmosis can have a bad prognosis. It is difficult to diagnose in our countries and facing a chronic pulmonary form, a diagnosis of tuberculosis is often thought of. But its possibility is to be envisaged in case of a journey in countries of endemia, and the disease should be confirmed by: -- several samplings to trace the fungus, bringing the mycological prove of the disease; -- serum uses; -- modalities and difficulties of the treatment by Amphotericin B are also recalled.

Adult↗
PubMed1979

[Cutaneous, subcutaneous, and lymph node cryptoccosis in a patient with sarcoidosis (author's transl)].

An Algerien patient aged 31 years with a histologically confirmed mediastinopulmonary sarcoidosis had a persistent stable miliary pulmonary x-ray image after cortisone therapy. Eighteen months after stopping the corticotherapy, he developed cryptococcosis which was mainly cutaneous, but associated with subcutaneous abscesses and peripheral adenopathy, and without lesions in the viscera or deep nodes. Cryptococcus antigens were present in the serum and there was a humoral and cellular immunity reaction towards the cryptococcus. Recovery occurred after amphotericin B and 5-fluorocytosine.

Adult↗
PubMed1979

[Iatrogenic mycoses with deep visceral localization caused by opportunistic fungi].

The new therapeutic methods based on antibiotics, corticosteroids and immunosuppressors and the new medicosurgical techniques (catheters, monitoring in intensive-care units, open-heart surgery) modify the host, favorise the adaptation and introduction f endogenous and exogenous yeast-like fungi and thus create a new pathology characterized by deep visceral or septicemic infections due to yeasts belonging to the genera Candida, Torulopsis, Cryptococcus, Trichosporon, Rhodotorula, and Saccharomyces. The pathological aspects are analyzed and therapy is suggested in the light of new findings on polyenes (nystatine, amphotericine B), 5-fluorocytosine, imidazole, derivatives (miconazole, econazole) considering their association in function of synergy or antagonism possibilities.

Amphotericin B↗
PubMed1978

Antifungal agents.

Explore the source record for details and available documents.

Amphotericin B↗