نتایج جستجو برای: enterotoxin a
تعداد نتایج: 13433604 فیلتر نتایج به سال:
Since the heat-stable enterotoxin (ST) produced by yersinia enterocolitica is similar to enterotoxin production by E. coli, it is probably classified among toxinogenic bacteria. The culture filtrate of ST-producing strains of Y. enterocolitica is able to activate Guanylate cyclase and to increase fluid accumulation action of cylic Guanosin 3', 5' - monophosphate (cGMP) in sucking mouse intestin...
Response of T cells in vivo induced by repeated superantigen treatments at different time intervals.
We have investigated the response of T cells to staphylococcal enterotoxin A (SEA) injections in vivo. We found that a single injection of SEA with an optimal dose of 10 microg increased the expression of both CD4 and CD8 significantly. There was expansion of SEA-reactive T cells in vivo after SEA re-injection and the time interval between injections strongly influenced the responsiveness of CD...
The emetic responses induced by staphylococcal enterotoxin A (SEA), SEB, SEC2, SED, SEE, SEG, SEH, and SEI in the house musk shrew (Suncus murinus) were investigated. SEA, SEE, and SEI showed higher emetic activity in the house musk shrew than the other SEs. SEB, SEC2, SED, SEG, and SEH also induced emetic responses in this animal model but relatively high doses were required. The house musk sh...
the present study was aimed to identify the frequency of coagulase (coa) and thermonuclease (nuc) genes and staphylococcal enterotoxin a (sea) production among staphylococcus aureus isolated from various sources in shiraz. moreover, the correlation between the sea gene and coagulase and thermonuclease enzymes is also considered. a total of 100 s. aureus were isolated from various sources includ...
Detection and Frequency of Enterotoxin (cpa,cpe) Genes Clostridium perfringens Isolated from Dehydrated Vegetables by PCR
Introduction: Breast cancer is one of the most prevalent malignancies among women. Patients whose suffering from this condition, as a result of the use of conventional therapies often have a poor response to treatment and the relapse among them is frequent. In this study, the effects of staphylococcal enterotoxin type B on BAK، FAS، BAX، TNF-a، BCL-2 و Survivin genes expression in human breast ...
yersinia enterocolitica is newly included in the classification of both the invasive bacteria, e.g. shigella, and the toxicogenic bacteria, e.g. escherichia coli. five human strains and 45 environmental strains were used to produce y.enterocolitical enterotoxin at 40c, 240c and 370c using infant mouse assay. at 250c enterotoxin was produced by 10 environmental strains and by all of the 3 human ...
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