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F Mariat

Publications and source records attributed to F Mariat.

At least 19 recordsLinked to original sources
PubMed1987

[Epidemiologic study of mycetomas in Mexico. Apropos of 502 cases].

The epidemiological data of 502 mycetomas studied in the Department of Mycology, "Centro Dermatológico Pascua", Mexico City, were analysed. Mycetomas prevail in males (79.7%), they are more frequent between 16 and 45 years of age (75%) and among rural workers (62.5%); they preferentially affect lower limbs (62.5%); these data are generally similar to the known publications on the matter. Actinomycetomas are the most frequent with 97.2% of the cases, distributed as follows: Nocardia: 85.6% among which 71.9% are N. brasiliensis, Actinomadura madurae: 9.6%, Streptomyces somaliensis: 1.6%, Actinomadura pelletieri: only one case: 0.2%. Eumycetomas, a total of 9, are due to Madurella mycetomi (2), Madurella grisea (2), an undetermined black grain (1), Acremonium sp. and Fusarium sp. (1), Fusarium, sp. (1), Pseudallescheria boydii (1), and an undetermined white grain (1).

Actinomyces↗
PubMed1985

Nutritional studies on Paracoccidioides brasiliensis: the role of organic sulfur in dimorphism.

The nutritional requirements of the mycelial and yeast-like phases of the dimorphic fungus Paracoccidioides brasiliensis, a human pathogen, were investigated. For all nine isolates tested, mycelial cells were prototrophic, whereas yeast-like cells required a sulfur-containing amino acid for growth. Moreover, changing the source of nitrogen greatly affected the morphology of the yeast-like cells.

Amino Acids, Sulfur↗
PubMed1982

[Phagocytosis of Candida albicans by polymorphonuclear leucocytes from patients with nodular lepromatous leprosy].

Patients suffering from nodular lepromatous leprosy are deficient in cellular immunity but may not be more susceptible to other infections. Therefore it is possible that other defense mechanisms are operational in dealing with other infectious agents these patients may be exposed to. In this report, the phagocytic and fungicidal activity of polymorphonuclear (PMN) cells against Candida albicans was examined using PMN from 20 nodular lepromatous patients and from 20 healthy subjects (controls). The method used was that of PMN adherence to glass. The phagocytic activity was evaluated after 15 mn and 45 mn. We observed that there was phagocytized by 94 % of the PMN from patients and by 95 % of the PMN from the controls. The phagocytic index of the yeasts ingested by the PMN were 4.47 and 4.10 for, respectively, patients and controls. The frequencies of yeasts killed by PMN from patients and controls were, respectively, 29.6 and 29.4 %. The results indicated that PMN from patients and healthy controls had the same capacity to phagocytize and to destroy yeasts of C. albicans.

Adult↗
PubMed1980

[Peptide-polysaccharides isolated from the culture medium of the fungus Paracoccidioides brasiliensis pathogenic to man].

A peptido-polysaccharide isolated from the culture medium of Paracoccidioides brasiliensis has been studied. The crude product is a mixture of several polysaccharides releasing, by hydrolysis glucose, mannose and galactose. The purified fraction contains mannose (88%) and galactose (12%). This galactomannan has a molecular weight varying between 4.6.10(4) and 2.6.10(4). It is associated with a peptide containing four amino-acids.

Fungi↗
PubMed1980

[Effects of diacetoxyscirpenol on experimental candidiasis of mice].

A single injection of 4.5 mg/kg of diacetoxyscirpenol (a toxin synthesized by Fusarium) into Mice challenged by C. albicans, increases significantly the development of an experimental candidiasis. Suspensions of homogenized kidneys was spread on Sabouraud dextrose agar plates and the colonies of C. albicans were counted after 24 hrs incubation. The mean values were determined. Comparison of mean values calculated for kidneys from the Mice challenged with C. albicans and those challenged with C. albicans plus toxin gave highly significant results.

Animals↗
PubMed1979

Perithecial ultrastructure and formation of ascospores of Ceratocystis stenoceras (Robak) C. Moreau.

Fine details of perithecial morphology and aspects of ascospore formation of Ceratocystis stenoceras (Robak) C. Moreau are shown in electron micrographs of ultrathin sections. The envelope of the perithecial body proper consisted of two zones of cells which differed morphologically one from another. Loose aggregates of small electron opaque particles were present at the outer wall surface which may be responsible for the characteristic pigmentation of the body and neck. Cells comprising the ostiolate neck may arise as modifications of spindle-shaped cells of the inner zone of the perithecial envelope. Cell walls of the neck and of zones 1 and 2 may be composed in part of periodic acid-reactive polysaccharide. The perithecial envelope and ascogenous cells were separated by a band of several parallel, double-layered membranes which may function in some manner with biosynthetic activities of ascospore production. In general, the mechanics of ascospore formation by C. stenoceras were in most ways in agreement with recent reports of ascospore outogeny in other ascomycetous fungi. Mature ascospores were somewhat lenticular in shape and the outer space wall was finely sculptured.

Ascomycota↗
PubMed1978

[Study of the sugar composition of Conidiobolus strains saprophytic or pathogenic to man and animal].

The composition in the cell wall sugars of 13 strains of Conidiobolus coronatus and 1 strain of Conidiobolus incongruus has been determined. Glucose and mannose were found to be the main sugars. The study of the ratio mannose/glucose has shown that there are 3 groups of strains. The first group which contains the strain of C. coronatus isolated from man or chimpanzee is characterized by a ratio lying between 0.92 and 1.3. The second group containing the strains of C. coronatus isolated from horse lesion or from soil is characterized by a ratio lying between 2.7 and 4.1. The last group which contains C. incongruus whose ratio mannose/glucose is 0.44. These results suggest the existence of two groups among the strains of C. coronatus. Lethal temperature of each strain and eventual presence of villosus spores are also mentioned.

Animals↗
PubMed1978

[Hendersonula toruloidea, causative agent of a fungal verrucous dermatitis observed in Algeria].

A verrucose dermatitis of the face, accompanied by onychomycosis was observed in a 30 years old male living in Algeria. He was born there and 15 years previously he had been treated successfully for "Dermatophytic disease" due to Trichophyton verrucosum. A deficiency in his cellular immune mechanism was noted at that time. On this occasion Hendersonula toruloidea was isolated from facial lesions and affected nails. The infection of the face, but not the nails, responded to treatment with amphotericin B. In the facial lesions, the fungus was present as single cell units sometimes with a false bud or a short hyphal extension. Cross walls were occasionally present but the cell walls were not pigmented. Intratesticular inoculation of the isolates to guinea pigs resulted in an infection in which the morphology of the fungus conformed to that found in the facial lesions. In cultures, the isolates of H. toruloidea conformed to the descriptions in literature, although pycnidia were not formed.

Adult↗
PubMed1978

[An endemic area of sporotrichosis in Guatemala].

An endemic area of sporotrichosis is described in the Lake of Ayarza District, South Guatemala, where 53 patients have been observed within 3 years. In 45.3% of the cases, the infection appeared after handling fish. The disease was more frequently observed in man (83%) and in patients less than 30 years of age. The most frequent clinical type was the ascending lymphocutaneous sporotrichosis of the limbs. Some cases of ulcerative or verrucous lesions were seen. Almost all the patients cured rapidly either by potassium iodide (46 patients) or spontaneously, or after application of local heat (4 patients). Intradermal tests were performed in healthy population in the endemic area and, for comparison, in Guatemala City. Whole yeast cell antigens of Sporothrix schenckii and Ceratocystis stenoceras were used in these tests. Skin tests to both antigens were more frequently positive in the endemic area; the highest frequency was obtained with the antigen of C. stenoceras. A serological study was performed in 26 patients. The fluorescent antibody staining technique was more sensitive than yeast cell and latex particles agglutinations. C. stenoceras was isolated from bark of some trees, especially Eucalyptus, in the environment, but not S. schenckii.

Agglutination↗
PubMed1978

[Cerebral mucormycosis in the cat caused by Mucor pusillus].

The pathologic examination of the brain of a pet cat, suspected of rabies, showed lesions of mucormycosis. The causal fungus, Mucor (Rhizomucor) pusillus was isolated and identified. The authors describe the lesions produced, the experimental pathogenicity for the rabbit and the morphologic and physiologic characteristics of the isolate.

Animals↗
PubMed1977

[Mycetoma in Somalia - results of a survey done from 1959 to 1964].

The Pasteur Institute studied 103 mycetoma patients in Somalia between 1959 and 1964. Grains were seen in 94 of them and this, added to cultural features, allowed the diagnosis of 60 pathogens as follows: 44 Madurella mycetomi, 1 Leptosphaeria senegalensis, 7 Pyrenochaeta romeroi (or Madurella grisea), 3 Allescheria boydii, 1 Fusarium sp., 3 Neotestudina (Zopfia) rosatii, and 1 unidentified; 34 were actinomycetes: 24 Streptomyces somaliensis, 4 Actinomadura madurae, 3 A. pelletieri and 3 Nocardia spp. The patients delayed too long in consulting their doctors and health education is vital if amputations are to be avoided. The geographical distribution is related to climate and fungal species. In central Somalia the association of M. mycetomi and S. somaliensis, organisms characteristic of desert conditions, was found; white grain mycetomata and those caused by Nocardia spp. occurred in more humid areas. The study revealed 2 new fungi. One, obtained in culture was called Neotestudina (Zopfia) rosatii. The 3 patients affected, lived in Mudugh (2 in El Bur). The other fungus was not identified. It also was recovered from El Bur and one with similar microscopic characters has been seen in Chad and also in "territoire français des Afars et des Issas". Both fungi are desert species.

Acremonium↗
PubMed1977

Ultrastructural observations of an unusual osmiophilic body in the hyphae of Sporothrix schenckii and Ceratocystis stenoceras.

Electron microscopy of 8 strains of Sporothrix schenckii and 1 strain each of Ceratocystis stenoceras, C. pluriannulata, C. ulmi, and C. minor revealed the presence of unusual osmiophilic structures (EOB) which appeared as normal organellar components of young cells of these fungi. In S. schenckii and C. stenoceras, these structures were markedly osmiophilic, reacted strongly with thiocarbohydrazide, could be partially solubilized with the lipid solvent sodium methoxide, and appeared to possess lipase activity. On subsequent cellular ageing, lipid bodies were commonly seen in intimate association with the EOB. Eventually, the EOB underwent degeneration and extensive vacuolization. It is suggested that these structures are composed in part of lipoidal material in possible association with a protein matrix, and may be in some manner involved with lipid metabolism of mechanisms of lipid storage.

Ascomycota↗
PubMed1977

[Man and fungi].

Explore the source record for details and available documents.

Fungi↗
PubMed1976

[Study of the contamination by dermatophytes of a population of small wild mammals in Alsace].

Mature fruit-bodies of Coprinus congregatus grown on modified Bille-Hansen medium were obtained with concentrations of glucose ranging from 5 to 40 g/l and asparagine from 0 to 4 g/l; the carbon/nitrogen ratio varying from 13 to 100. When the ratio C/N is too high (above 100), no visible primordium is formed; when this ratio is under 13, numerous primordia are produced, but they never reach maturity. A positive correlation exists between the C2/N ratio and the time required for producing mature fruit-bodies. The best yield for basidiocarps production is reached when the C/N ratio value is around 30 and glucose concentrations range from 10 to 20 g/l.

Animals↗
PubMed1976

Study of the long chain bases of sphingomyelin of Entomophthora coronata.

Sphingomyelin was isolated from a strain of Entomophthora coronata, a fungus pathogenic for humans. After hydrolysis, the long chain bases were converted to their dinitrophenyl (N2pH) derivatives and the aldehydes prepared by oxidizing these compounds with periodic acid. The aldehydes were studied by gas chromatography. Twelve different aldehydes were identified, the chain distributiion ranging from C14 to C17. The prominent chains were unsaturated. Straight and branched chains were found. The most abundant parent base which formed 52% of the total aldehyde was a 1,3-dihydroxy-2-aminohexadecene.

Aldehydes↗