Electron microscopes have been widely used to investigate cell structures under high resolution. A scanning electron microscope (SEM) provides tridimensional images of a cell surface, while a transmission electron microscope (TEM) is commonly employed to observe the internal structure changes of host cells after bacterial adherence and invasion. The SEM and TEM can reveal bacterial location, bi...

The observations reported in this paper demonstrate that the intravascular interaction of bacterial and animal protein antigens with homologous antibodies at the site of a tissue made vulnerable by bacterial filtrates induces prompt severe hemorrhagic necrosis in this tissue. In the light of these observations there is offered an explanation of the mechanism underlying focal and skin bacterial ...

Opa proteins are variable outer membrane proteins of Neisseria gonorrhoeae and Neisseria meningitidis that mediate tight interaction of these pathogens with human cells. They have emerged as a paradigm of a bacterial toolbox allowing recognition of different host receptors and orchestrating the cell type tropism displayed by pathogenic Neisseriae. Recent work has highlighted the molecular basis...

Two force probing methods were used to quantify nanoscale forces in the interaction of bacterial lectin LecA with glycolipid Gb3, revealing how aids attachment and lowers energy required for uptake.

objective: this study investigated the antibacterial properties of an ion-releasing resin composite (degufill), a hybrid resin composite (inten-s), a compomer (compoglass f) and a resin-modified glass ionomer (vitremer) against streptococcus mutans. materials and methods: the bacteria were derived from the dental plaque and cultured on blood agar plates. eppendorf tubes were filled by unset res...

Counter-selectable markers can be used in two-hybrid systems to search libraries for a protein or compound that interferes with a macromolecular interaction or to identify macromolecules from a population that cannot mediate a particular interaction. In this report, we describe the adaptation of the yeast URA3/5-FOA counter-selection system for use in bacterial interaction trap experiments. Two...

Despite the enormous proliferation of bacterial genome data, surprisingly persistent collections of bacterial proteins have resisted functional annotation. In a typical genome, roughly 30% of genes have no assigned function. Many of these proteins are conserved across a large number of bacterial genomes. To assign a putative function to these conserved proteins of unknown function, we created a...

aims: the internal unit and icu of hospitals are a suitable environment for growing of bacteria such as staphylococcus epidermidis, pseudomonas and acinetobacters. the aim of this study was to evaluate the efficacy of using disinfectants on bacterial remove in isfahan city, iran, hospitals. instrument & methods: this descriptive study was performed in isfahan city, iran, hospitals in 2015. 200 ...