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Biomedical subjects

M Dorn

Publications and source records attributed to M Dorn.

At least 55 records · Page 3Linked to original sources
PubMed1980

[Collodion baby and harlequin fetus. Comparison of 2 cases].

Two cases of severe congenital ichthyosis are presented: "collodion baby" and "harlequin fetus". The collodion baby is no clinical entity, but a symptom occurring in several forms of ichthyosis. In our patient the collodion skin was a symptom of ichthyosis congaenita (lamellar ichthyosis). Treatment with orally administered steroids was life-saving. The harlequin fetus represents a distinct entity characterized by a lethal genotype. There is a molecular defect of keratinization.

Female↗
PubMed1979

[Tinea corporis from Trichophyton simii].

Tn unexplained, autochthone Trichophyton simii infection in Europe is reported. The patient was a 11-year-old caucasian girl, who had never been out of Germany, nor had contact with anyone from abroad. The girl's only pet, a guinea pig, was proven to be free of dermatophytes. Clinically the infection represented a somewhat persistent circumscribed lesion at the dorsum of one upper arm characterized mainly by small granulomata around hair follicles with only a slight erythematosquamous component.

Animals↗
PubMed1978

Fumarate reductase of Clostridium formicoaceticum. A peripheral membrane protein.

When Clostridium formicoaceticum was grown on fumarate or L-malate crude cell extracts contained a high fumarate reductase activity. Using reduced methyl viologen as electron donor the specific activity amounted to 2-3.5 U per mg of protein. Reduced benzyl viologen, FMNH2 and NADH could also serve as electron donors but the specific activities were much lower. The NADH-dependent activity was strictly membrane-bound and rather labile. Its specific activity did not exceed 0.08 U per mg of particle protein. Fumarate reductase activity was also found in cells of C. formicoaceticum grown on fructose, gluconate, glutamate and some other substrates. The methyl viologen-dependent fumarate reductase activity could almost completely be measured with intact cells whereas only about 25% of the cytoplasmic acetate kinase activity was detected with cell suspensions. The preparation of spheroplasts from cells of C. formicoaceticum in 20 mM HEPES-KOH buffer containing 0.6 M sucrose and 1 mM dithioerythritol resulted in the specific release of 88% of the fumarate reductase activity into the spheroplast medium. Only small amounts of the cytoplasmic proteins malic enzyme and acetate kinase were released during this procedure. There results indicate a peripheral location of the fumarate reductase of C. formicoaceticum on the membrane.

Acetate Kinase↗
PubMed1978

Fermentation of fumarate and L-malate by Clostridium formicoaceticum.

The fermentation of fumarate and L-malate by Clostridium formicoaceticum was investigated. Growing and nongrowing cells degraded fumarate by dismutation to succinate, acetate, and CO2; on the other hand, only small amounts of succinate were detected when the organism was grown on L-malate. This dicarboxylic acid was mainly converted to acetate and CO2. The fermentation balances were modified if bicarbonate or formate were present in the medium. When C. formicoaceticum was grown in the presence of both dicarboxylic acids, fumarate was consumed before L-malate. The latter was mainly converted to acetate, whereas fumarate was fermented to acetate and succinate. Molar growth yields were determined to be 6 g of dry weight per mol of fumarate and 8 g of dry weight per mol of L-malate fermented.

Acetates↗
PubMed1977

Dimorphism of Pityrosporum orbiculare in a defined culture medium.

Dimorphism of Pityrosporum orbiculare was induced in an artificial culture medium which consisted of 0.05 M glycine in 0.03-0.06 M ammonium phosphate buffer (pH 5.6), salts, glucose, and Tween-80. Of the strains tested, 78 to 85% produced hyphal elements from up to 8.5% of yeast cells. Morphologic features of P. orbiculare in culture were examined by scanning electron microscopy and compared with the appearance of fungus from clinical lesions of tinea versicolor. Morphologically, the fungi obtained in vivo and in vitro were identical.

Culture Media↗
PubMed1977

[Tinea nigra plantaris].

A second case of tinea nigra occuring in Germany is recorded. The patient was a 33 year old women, who supposedly acquired the infection in Israel, which was not diagnosed until two years after the onset. Scrapings from a dark macule on her sole yielded Cladosporium werneckii. The lesion cleared with topical treatment of a keratinolytic ointment and a haloprogin-cream.

Adult↗
PubMed1976

[Effects of Candida albicans on wound-healing in an animal model (author's transl)].

The effects of Candida albicans on the healing of experimental wounds in rats was investigated. Granulation tissue developing in implated polyvinylchloride chambers was quantified. The amount of granulation tissue in the yeast-contaminated wounds is significantly less in comparison to controls. The inhibitory effect is directly proprotional to the amount of inoculated yeasts and dependes on the presence of living yeast cells. The repair of ulcers is supposedly retarded by yeast contamination, as has been suggested previously by clinical observation.

Animals↗
PubMed1975

[Econazole nitrate. In vitro tests and clinical trial].

Econazole-nitrate is a new potent antifungal drug with a broad spectrum against dermatophytes, yeasts and moulds; in addition it is effective against gram-positive bacteria. Econazole nitrate was tested in-vitro for antifungal and anti-microbial properties. In an open trial 75 patients were treated with a 1 percent econazole cream. Cure was achieved in tinea pedis in 91 percent; in tinea genitocruralis in 100 percent and in tinea corporis in 92 percent. The remainder were greatly improved. 22 patients with erythrasma were cured within 3 weeks.

Adolescent↗