The exfoliative toxins, TSST-1, and the enterotoxins are all superantigens. The genes for these toxins are A: Present in all strains of Staphylococcus aureus B: Widely distributed on the staphylococcal chromosome C: On both the staphylococcal chromosome (TSST-1 and exfoliative toxins) and on plasmids (enterotoxins) D: On the staphylococcal chromosome in a pathogenicity island E: On plasmids

The pathogenic characteristics of enterotoxigenic Escherichia coli shall be excluded: A: Adhesion to the epithelial cells of the upper intestinal mucosa B: Production of heat and / or heat labile enterotoxins C: Toxicity can be transmitted to other E.coli through plasmids D: Enterotoxin causes severe damage to mucous membrane