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PubMed1978

Comparison of "invasive" and "non-invasive" strains of Staphylococcus epidermidis by phage typing.

Seventy strains of coagulase-negative staphylococci isolated from blood of patients together with 41 strains of these bacteria isolated from the skin were typed by three different phage sets. Different percentages of phage typability by compared phage sets were found. Blood culture strains showed phage pattern Ph10/U14/U16 while other strains were of different phage patterns.

Bacteriophage Typing↗
PubMed1975

Studies on polysaccharide C of staphylococcus epidermidis. 2. Antigenic properties.

The antigenic properties of polysaccharide C (poly C) of S. epidermidis strongly support the analytical indications that it is an N-acetylglucosaminylglycerol teichoic acid with 1:3-phosphodiester linkages. The major antigenic determinant is N-acetyglucosamine, predominantly present in the beta-configuration. Also anti-glycerophosphate antibodies are produced, apparently dependent on the degree of glycosylation. Purified poly C was unable to sensitize either normal or tanned sheep erythrocytes for agglutination in antisera.

Acetylglucosamine↗
PubMed1975

Studies on polysaccharide C of Staphylococcus epidermidis. 1. Isolation and chemical characterization.

Polysaccharide C (poly C) has been isolated from two strains of S. epidermidis and characterized chemically. The results suggest that poly C is a wall N-acetylglucosaminylglycerol teichoic acid, linked through 1:3-phosphodiester linkages. One poly C preparation contained only beta-linked N-acetyglucosamine, the other traces of alpha-linked sugar in addition. The degree of substitution of sugar in the poly C preparations from the two strains was about 50 and 25 per cent.

Acetylglucosamine↗
PubMed1977

[Drug resistance of hospital strains of Staphylococcus epidermidis belonging to different biological types].

A total of 567 strains of Staph. epidermidis isolated from the bacteria carriers in several surgical units were studied. The cultures were typed according to the method developed by the authors. Their resistance to 12 antibiotics, mercuric chloride and cadmium sulphate was determined. Comparison of the strain biotypes and their drug resistance showed in some cases statistically significant correlation. It should be especially noted that staphylococci with pronounced polyresistance (simultaneous resistance to 7--12 antibiotics) prevailed among the strains belonging to biotypes 1 and 3.

Carrier State↗
PubMed1981

[Comparative immunochemical and immunoallergic characteristics of staphylococci of different pathogenicity. II. Diagnostic value of extracts of Staphylococcus aureus and Staphylococcus epidermidis in delayed type allergic reactions].

A total of 20 different allergens extracted from various staphylococcal strains were studied in the delayed hypersensitivity reactions in experiments on guinea-pigs. The most intensive dermatoallergic reactions were observed after the injection of the cytoplasmic fraction, acidic and alkaline extracts; reactions to the allergen of Ando-Verzhikovsky were less pronounced. The cytoplasmic fraction and the allergen of ando-Verzhikovsky were more active in the reaction of leukocyte migration inhibition in the blood. Both common and individual allergenic components were detected. No correlation between the results of the immunochemical and allergological studies of staphylococcal extracts was revealed.

Allergens↗
PubMed1973

Edman degradation on in vitro biosynthesized peptidoglycans from Staphylococcus epidermidis.

Edman degradations were performed on the pentapeptide bridges of peptidoglycans which were biosynthesized in vitro by using six different species of seryl-transfer ribonucleic acid (tRNA). The ratio of glycine to serine in each of the five bridge positions varied with the concentration of crude glycyl-tRNA contained in the reaction mixtures, and serine appeared to be incorporated in a random manner. No single species of seryl-tRNA could be identified as the one active in in vivo pentapeptide bridge synthesis; however, it can be speculated that seryl-tRNA(s) from category I could be involved in the in vivo nonrandom incorporation of serine in the bridge.

Amino Acid Sequence↗