Permeability barriers of Gram‐negative pathogens
نویسندگان
چکیده
منابع مشابه
Lecithinase production by gramnegative bacteria.
Lecithinase production by microorganisms has been investigated in an attempt to use it in the classification of bacteria, and to associate formation with toxicity and virulence. The first record of this reaction was made when Nagler (1939) and Seifert (1939) observed, independently, the formation of an opalescence in human serum by the a toxin of Clostridium perfringens. It was soon found that ...
متن کاملThe outer parts of the mycobacterial envelope as permeability barriers.
The permeability of mycobacteria to substances in their environment is controlled by the properties of their envelopes. Two special features are important: an outer lipid barrier based on a monolayer of characteristic mycolic acids and a capsule-like coat of polysaccharide and protein. The mycolate layer prevents entry of small hydrophilic molecules, which obtain access to the cell by way of po...
متن کاملLocalization of Permeability Barriers in the Frog Skin Epithelium
Ruthenium red and colloidal lanthanum were used to determine the site of the structural barriers to diffusion within the intercellular spaces of frog skin epithelium. Electron micrographs show that occluding zonules located at the outer border of the stratum corneum and at the outer layer of the stratum granulosum are true tight junctions since they are impermeable to these tracers. Measurement...
متن کاملPermeability of blood nerve barriers in the diabetic rat.
An albumin-Evans blue conjugate has been used as a fluorescent tracer to demonstrate the increased permeability of endoneurial capillaries and perineurial sheath of the sciatic nerve of the alloxan-diabetic rat. The significance of the extravasation of protein into the endoneurial space is discussed in relation to the altered dynamics of the endoneurial microcirculation. It is suggested that ti...
متن کاملAntibacterial efficacy of disinfectants against some gramnegative bacteria.
The antibacterial effect of 11 new commercially manufactured disinfectants on clinical isolates of Salmonella typhimurium DT104, Serratia marcescens and Pseudomonas aeruginosa was studied. The substances tested represented six pure quaternary ammonium substances (QAS) and five QAS combined with other ingredients. The antibacterial efficacy was characterized by influencing the growth of bacteria...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annals of the New York Academy of Sciences
سال: 2019
ISSN: 0077-8923,1749-6632
DOI: 10.1111/nyas.14134