Sporulation and enterotoxin formation were determined for 17 strains of Clostridium perfringens type A in autoclaved chicken dark meat and in Duncan-Strong sporulation medium. The mean numbers of heat-resistant spores detected after 24 h at 37 degrees C were log10 1.13 to log10 7.64/ml in Duncan-Strong medium and log10 4.93 to log10 6.59/g in chicken. Of 17 strains, 7 formed enterotoxin in Dunc...

Sugiyama, H. (University of Chicago, Chicago, Ill.), and E. M. McKissic, Jr. Leukocytic response in monkeys challenged with staphylococcal enterotoxin. J. Bacteriol. 92:349-352. 1966-The feeding of staphylococcal enterotoxin to monkeys elicited a leukocytosis which was evident within 0.5 hr of challenge. The peak neutrophilic leukocytosis was reached in 3 hr, and then subsided so that leukocyte...

1. Dogs develop severe gastrointestinal symptoms in response to intraintestinal administration of staphylococcal enterotoxin. These symptoms are salivation, vomiting, and diarrhea. 2. Staphylococcal enterotoxin induces acute enteritis marked by edema, hyperemia, round cell infiltration, mucosal exudation, and destruction of intestinal villi. 3. Prolonged administration of enterotoxin into the l...

Inclusion bodies (IB) synthesized during sporulation and enterotoxin formation by Clostridium perfringens NCTC 8239 and 8798 were isolated and characterized. IB were isolated by disruption of sporangia by sonication in the presence of tetrasodium EDTA and phenylmethylsulfonyl fluoride. Fractionation was carried out in a linear gradient of sodium bromide, sucrose, or diatrizoate sodium. Denaturi...

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...

Bacteroides fragilis constitutes about 1% of the bacterial flora in intestines of normal humans. Enterotoxigenic strains of B. fragilis have been associated with diarrheal diseases in humans and animals. The enterotoxin produced by these isolates induces fluid changes in ligated intestinal loops and an in vitro cytotoxic response in HT-29 cells. We developed a nested PCR to detect the enterotox...

the role of enterotoxigenic e.coli as a causative agent in diarrheal disease was studied among 100 cases of infant and children 0-2 years of age. routine bacteriological methods were used for identification enteropathogenic e.coli, salmonella, shigella and vibrio cholera. the ability of e.coli strains to produce toxin was assayed in animal models (rebbit-ileal loop and suckling mice) and in tis...

The method of passive immune hemolysis of Evans and Evans (Infect. Immun. 16:604-609, 1977) for detection of heat-labile enterotoxin produced by enterotoxigenic Escherichia coli was modified. A total of 373 strains of E. coli were tested by this method using materials obtained by treating the cells with polymyxin B and rabbit antiserum against cholera enterotoxin, purified by affinity gel colum...