Immunochemical Studies on Shigella dysenteriae Lipopolysaccharides
نویسندگان
چکیده
منابع مشابه
Survival of Shigella dysenteriae on fomites
Studies have shown that various objects, such as utensils, toys, and clothes, can serve as vehicles for transmission of Shigella spp. Shigellae can become viable but non-culturable (VBNC) when exposed to various environmental conditions as shown in earlier studies. The present study was carried out to detect VBNC Shigella dysenteriae type 1 on various fomites by direct viable counting, polymera...
متن کاملImmunochemical and cytotoxic activities of Shigella dysenteriae 1 (shiga) and shiga-like toxins.
Toxins in culture supernatants and bacterial lysates of S. dysenteriae 1 and S. flexneri were quantitated by a cytotoxicity assay and a newly developed radioimmunoassay. Cytotoxin titers paralleled toxin antigen levels. Thus, variations in cytotoxicity among shigellae probably reflect differences in toxin yield rather than specific activity (cytotoxicity per microgram of toxin antigen).
متن کاملStudies on the nutritional requirements of bacteria. II. On the nutrition of Shigella dysenteriae.
The synthetic medium for Shigella dysenteriae which has hitherto been known contains many amino acids and also niacin-amide, although the necessity of which remains obscure (5, 11,12) . We have been examining the process of the evolution of the bacterial nutrition (or the retroevolution), especially about the nitrogen source. It is the purpose of this paper to report the nutritional nitrogen so...
متن کاملShigella dysenteriae Serotype 1, Kolkata, India
Since July 2002, bacteriologically confirmed shigellosis cases have increased, and multidrug-resistant Shigella dysenteriae serotype 1 strains have reemerged in patients hospitalized with diarrhea in Kolkata, India. The isolated strains of S. dysenteriae 1 showed resistance to chloramphenicol (80%), ampicillin (100%), tetracycline (100%), co-trimoxazole (100%), nalidixic acid (100%), norfloxaci...
متن کاملSibling sRNA RyfA1 Influences Shigella dysenteriae Pathogenesis
Small regulatory RNAs (sRNAs) of Shigella dysenteriae and other pathogens are vital for the regulation of virulence-associated genes and processes. Here, we characterize RyfA1, one member of a sibling pair of sRNAs produced by S. dysenteriae. Unlike its nearly identical sibling molecule, RyfA2, predicted to be encoded almost exclusively by non-pathogenic species, the presence of a gene encoding...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1973
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1973.tb03204.x