Vaccines for Staphylococcus aureus and Target Populations

Staphylococcus aureus Vaccine Research and Development: The Past, Present and Future, Including Novel Therapeutic Strategies

Frontiers in Immunology ◽

10.3389/fimmu.2021.705360 ◽

2021 ◽

Vol 12 ◽

Author(s):

Jonah Clegg ◽

Elisabetta Soldaini ◽

Rachel M. McLoughlin ◽

Stephen Rittenhouse ◽

Fabio Bagnoli ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Science Studies ◽

Vaccine Development ◽

Ex Vivo ◽

Human Pathogens ◽

Vaccine Candidates ◽

Target Populations ◽

Antibiotic Resistance Profile ◽

Novel Therapeutic Strategies

Staphylococcus aureus is one of the most important human pathogens worldwide. Its high antibiotic resistance profile reinforces the need for new interventions like vaccines in addition to new antibiotics. Vaccine development efforts against S. aureus have failed so far however, the findings from these human clinical and non-clinical studies provide potential insight for such failures. Currently, research is focusing on identifying novel vaccine formulations able to elicit potent humoral and cellular immune responses. Translational science studies are attempting to discover correlates of protection using animal models as well as in vitro and ex vivo models assessing efficacy of vaccine candidates. Several new vaccine candidates are being tested in human clinical trials in a variety of target populations. In addition to vaccines, bacteriophages, monoclonal antibodies, centyrins and new classes of antibiotics are being developed. Some of these have been tested in humans with encouraging results. The complexity of the diseases and the range of the target populations affected by this pathogen will require a multipronged approach using different interventions, which will be discussed in this review.

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Cytochemical Studies of Cell Wall Biosynthesis in Staphylococcus Aureus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100094905 ◽

1972 ◽

Vol 30 ◽

pp. 328-329

Author(s):

Masaatsu Koike ◽

Koichi Nakashima ◽

Kyoko Iida

Keyword(s):

Staphylococcus Aureus ◽

Periodate Oxidation ◽

Early Time ◽

The Other ◽

Penicillin G ◽

Cell Wall Biosynthesis ◽

Septal Wall ◽

Peptidoglycan Biosynthesis ◽

Gram Positive Bacteria ◽

Cross Linkage

Penicillin exerts the activity to inhibit the peptide cross linkage between each polysaccharide backbone at the final stage of wall-peptidoglycan biosynthesis of bacteria. Morphologically, alterations of the septal wall and mesosome in gram-positive bacteria, which were occurred in early time after treatment with penicillin, have been observed. In this experiment, these alterations were cytochemically investigated by means of silver-methenamine staining after periodate oxidation, which is applied for detection of localization of wall mucopolysaccharide.Staphylococcus aureus strain 209P treated with 100 u/ml of penicillin G was divided into two aliquotes. One was fixed by Kellenberger-Ryter's OSO4 fixative at 30, 60 and 120 min after addition of the antibiotic, dehydrated through alcohol series, and embedded in Epon 812 (Specimen A). The other was fixed by 21 glutaraldehyde, dehydrated through glycolmethacrylate series and embedded in glycolmethacrylate mixture, according to Bernhard's method (Specimen B).

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Gold labeling of teichoic acid on adjacent surfaces of staphylococcus aureus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100160443 ◽

1990 ◽

Vol 48 (3) ◽

pp. 578-579

Author(s):

Margaret Hukee

Keyword(s):

Staphylococcus Aureus ◽

Teichoic Acid ◽

Protein Labeling ◽

Minimal Amount ◽

Section Thickness ◽

Double Labeling ◽

Parallel Surfaces ◽

Supporting Membrane

Gold labeling of two antigens (double labeling) is often done on two section surfaces separated by section thickness. Whether labeling is done on both sides of the same section or on two parallel surfaces separated by section thickness (PSSST), comparable results are dependent on an equal number of epitopes being exposed at each surface. We propose a method to study protein labeling within the same field of proteins, by examining two directly adjacent surfaces that were split during sectioning. The number of labeling sites on adjacent surfaces (AS) were compared to sites on PSSST surfaces in individual bacteria.Since each bacteria needed to be recognizable in all three section surfaces, one-hole grids were used for labeling. One-hole grids require a supporting membrane and excessive handling during labeling often ruptures the membrane. To minimize handling, a labeling chamber was designed that is inexpensive, disposable, minimizes contamination, and uses a minimal amount of solution.

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