Biomedical subjects

J G Nagel

Publications and source records attributed to J G Nagel.

3 recordsLinked to original sources

PubMed1977

Teichoic acids in pathogenic Staphylococcus aureus.

Twenty-six strains of Staphylococcus aureus obtained from patients with endocarditis were studied for the production of alpha- and/or beta-ribitol teichoic acid (TA), using highly specific anti-TA antibodies prepared in rabbits. A counterimmunoelectrophoretic assay was used. Beta-TA was the predominant residue produced by all strains; alpha-TA was found in all strains, but in smaller amounts and with much strain-to-strain variations. Antibodies in patients' sera were found against beta-TA in higher titers and for longer periods than were anti-alpha-TA antibodies. Antibodies against one or both TA residues were present in all but one of 26 patients.

Antibodies, Bacterial↗

PubMed1975

Teichoic acid serologic diagnosis of staphylococcal endocarditis. Use of gel diffusion and counterimmunoelectrophoretic methods.

Explore the source record for details and available documents.

Antibodies, Bacterial↗

PubMed1973

Needless retesting of quality-assured, commercially prepared culture media.

Current revival of interest in quality control of bacteriological culture media prompted this laboratory to develop and implement a system of quality control testing of media purchased from commercial manufacturers. During 8 months we tested more than 900 lots of 46 different media representing 350,000 units of culture media purchased from two major and one minor supplier(s). Only 17 lots were found to be unsatisfactory. This experience raised a question about the real necessity for extensive retesting by users of commercially prepared, quality-assured media. It is suggested that primary responsibility for quality control be placed on the relatively few manufacturer-vendors rather than on the multiple purchaser-users, who may not possess either the expertise or the resources for quality control programs.

Bacteria↗