background and objectives: shiga toxin-producing escherichia coli ( stec) have emerged as human pathogens and contamination of foods of animal origin has been a major public health concern. the aim of the present study was to determine the dissemination of stec in healthy and diarrheic calves in urmia region which is located in west azerbaijan province, iran. materials and methods: in the curre...

bacterial protein toxins have been exploited as therapeutic agents and as vaccines. an issue of deserving interest is development of new generations of vaccines and immune adjuvants. in this study an active assembled recombinant shiga toxin of escherichia coli (rstx1) and its derivatives, recombinant a and b subunits (stx1-a and stx1-b), were used to immunize mice. the elicited antibody respons...

novel subtype of Shiga Toxin type 1 2 Authors: William S. Probert, Cassandra McQuaid, and Kimmi Schrader 3 Affiliation: Microbial Diseases Laboratory Branch, California Department of Public 4 Health, Richmond, CA 5 Running Header: Shiga toxin-producing Enterobacter cloacae 6 Address Correspondence to William S. Probert, [email protected] 7 *Present Address: Cassandra McQuaid, San Francis...

Shiga toxin-producing Escherichia coli (STEC) O80:H2 is an uncommon hybrid pathotype that has emerged in Switzerland and France. Here, we report the draft genome sequences of 19 stx -harboring strains isolated between 2003 2019 from patients Switzerland.

The Shiga toxin family consists of Shiga toxin (Stx) that is produced as a virulence factor by Shigella dysenteriae, and the Shiga-like toxins produced by certain strains of enterohemorrhagic E. coli as well as by some other types of bacteria. Infection with bacteria producing these toxins is a threat to human health even in industrialized countries, as the initial diarrhea caused by the infect...

A toxin from an enteropathogenic strain of Escherichia coli (E. coli H30) was purified to apparent homogeneity from cell lysates. The steps used to isolate the E. coli H30 toxin included French pressure-cell disruption of bacteria grown in iron-depleted media. Affi-Gel Blue chromatography, chromatofocusing, and anti-Shiga toxin affinity chromatography. The mobilities of the subunits of radioiod...

BACKGROUND Hemolytic uremic syndrome associated with Shiga toxin-producing Escherichia coli O157:H7 has been widely known as a common cause of acute renal failure in children. There are only a few reports of sporadic Shiga toxin-producing Escherichia coli-hemolytic uremic syndrome in adults in the USA. Analyses from the 2011 outbreak of hemolytic uremic syndrome associated with Escherichia coli...

shiga toxin-producing escherichia coli (stec) are food-borne pathogens primarily associated with the consumption of contaminated ground beef and are an important food safety concern worldwide. stec has been found to produce a family of related cytotoxins known as shiga toxins (stxs). shiga toxins have been classified into two major classes, stx1 and stx2. a single strains of stec can produce st...

Escherichia coli Shiga-like toxin I, a close relative of Shiga toxin and a distant relative of the ricin family of plant toxins, inhibits eukaryotic protein synthesis by catalyzing the depurination of adenosine 4324 in 28S rRNA. By comparing the crystallographic structure of ricin with amino acids conserved between the Shiga and ricin toxin families, we identified seven potential active-site re...

Shiga toxin, Shiga-like toxin I (SLT-I) and Shiga-like toxin II (SLT-II) are cell-associated cytotoxins that kill both Vero cells and HeLa cells, whereas Shiga-like toxin II variant (SLT-IIv) is an extracellular cytotoxin that is more cytotoxic for Vero cells than for HeLa cells. The basis for these differences in cytotoxin localization and host cell specificity were examined in this study. The...