Erythrogenic
No. For something to be virulent it must be alive. Virulence usually refers to pathogens, like bacteria, viruses, and yeasts. But, pathogens, themselves, can create toxins by their metabolic activity. Still, however, the toxin itself wouldn't have the property of being virulent, only the "bug" would be.
Toxins
Toxins.
Toxins.
Immunity
Some pathogens produce toxins.
Astrocytes are most responsible for preventing pathogens and toxins from entering the brain through blood.
A vaccine
yes.
If they have been contaminated with pathogens or toxins, yes.
page 291 American school? (B) bacteria
Poisons produced by pathogenic bacteria are called "bacterial toxins."