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Biomedical subjects

F Denis

Publications and source records attributed to F Denis.

At least 307 records · Page 17Linked to original sources
PubMed1977

[The rapid detection and specific identification of bacterial antigens by electro-immunodiffusion in 80 cases of purulent meningitis (author's transl)].

The cerebrospinal fluid of 120 subjects, 80 of whom were suffering from a purulent meningitis, were examined comparatively by classical bacteriological techniques (direct examination and culture) and by electro-immunodiffusion. This procedure makes it possible to detect not only viable bacteria, but also capsular polysaccharide antigens. It revealed the diagnosis in 96.9% of cases of meningococcal, pneumococcal and Haemophilus meningitis, as against 80.3% positive results using classical bacteriological techniques, for the same organisms. Electro-immunodiffusion provides a rapid answer (20 minutes) and, amongst other things, makes it possible: - to confirm the serotype or capsular type within the species, - to determine the aetiological diagnosis in certain types of meningitis where diagnosis is rendered difficult by blind antibiotic therapy, - to quantify and follow over a period of time the levels of polysaccharide antigens in the cerebrospinal fluid and serum of the patients. The sensitivity and specificity of electro-immunodiffusion render it a technique of the future in the diagnosis of purulent meningitis. By virtue of its simplicity, it should become a routine examination.

Antigens, Bacterial↗
PubMed1977

[Ultrastructure of Listeria monocytogenes bacteriophages].

No morphological differences were found among the 10 Listeria phages suspensions examined. The polyhedric head appears to be about 62-66 nm in diameter, the tail devoided of contractile sheath measures 260-280 X 10 nm. The phage adsorption is observed on the cell-wall of Listeria.

Bacteriophages↗
PubMed1977

[Lysine decarboxylase in Pseudomonas aeruginosa].

The research of lysine, ornithine and arginine decarboxylases has been made for 50 strains of fluorescent Pseudomonas (P. aeruginosa, P. fluorescens, P. putida). By thin layer chromatography, all the strains of Pseudomonas aeruginosa and the fifth of the strains of P. putida had lysine decarboxylase activity at alcaline pH (optimal pH 8) ; Pseudomonas fluorescens did not produce this decarboxylase. Arginine and ornithine decarboxylase are absent for all the strains of fluorescent Pseudomonas.

Arginine↗