Several factors which regulate the synthesis of enterotoxin B were examined in Staphylococcus aureus S-6 and in its heme-requiring mutant S-6H2. The kinetics of enterotoxin B synthesis during anaerobic growth were identical to those observed under aerobic conditions; extracellular enterotoxin accumulated in the medium during the transition between exponential and stationary phase growth. Strain...

Citation: Kumar A (2015) Commentary: Incorporation of membrane-anchored flagellin or Escherichia coli heat-labile enterotoxin B subunit enhances the immunogenicity of rabies virus-like particles in mice and dogs. Front. Microbiol. 6:1039. doi: 10.3389/fmicb.2015.01039 Commentary: Incorporation of membrane-anchored flagellin or Escherichia coli heat-labile enterotoxin B subunit enhances the immu...

THE EMETIC ACTION OF STAPHYLOCOCCUS ENTEROTOXIN WAS TESTED ON YOUNG AND ADULT CATS UNDER VARIOUS EXPERIMENTAL CONDITIONS WITH THE FOLLOWING RESULTS: 1. No direct action on isolated intestinal strips was observed. 2. Emesis resulted following intravenous, intracardial, and intraperitoneal injections, but failed to appear subsequent to oral, subcutaneous, or intramuscular administration. 3. Emesi...

Staphylococcal enterotoxin B is a potent mitogen for mouse and human lymphocytes. Mitogenic activity was retained after detoxification of the enterotoxin by formaldehyde at pH 5.0, 7.5, OR 9.5. The most active toxoid (pH 7.5) was separated into a monomeric, a dimeric, and a polymeric fraction (1 x 10(5) to 3 x 10(5) molecular weight) by gel filtration, and although each fraction demonstrated mi...

hepatitis b surface antigen is the first genetically engineered vaccine licensed for human use. various strategies have been proposed to obtain a vaccine that would bypass the need for injection. in this study, a non-toxic portion of heat-stable enterotoxin of escherichia coli that is capable of adhering to epithelial cells was inserted at amino acid position 112 of hepatitis surface antigen. t...

staphylococcus aureus is a hazard to human health since they can cause a wide variety of hospital-associated infections ranging from minor skin infections to post-operative wound infections and food poisoning which produces many different virulence factors, including enterotoxins (ses). although  studies  have  been  done  regarding  the difference  between  virulence  factors  of  sensitive st...

This study evaluated a direct multiplex PCR to detect food contamination with enterotoxigenic Bacillus cereus (B. cereus) in comparison with culture and multiplex gene detection using colonies. Detection of B. cereus enterotoxin genes was done on artificially contaminated and ready-toeat market foods including cooked rice, pasteurized milk and cheese. Of the 108 food samples analysed, 51(47.2 %...

Polymyxin B-induced release of enterotoxin from Escherichia coli strain H-10407 was demonstrated. Incubation of E. coli cells derived from 6-h cultures with polymyxin caused the rapid release of enterotoxin with a molecular weight of approximately 20,000, as estimated by the gel filtration technique. The rapidity of the release of enterotoxin indicates that it probably resides in the periplasmi...

The production of enterotoxins A, B, and C by nine strains of Staphylococcus aureus has been studied under controlled conditions in a fermenter. The strain to strain differences between staphylococci producing a specific enterotoxin were very marked. Increasing aeration in shake flasks improved both growth and production of all extracellular proteins measured other than that of enterotoxin C, t...