1) In general, the LD50 for exotoxins is much greater than the LD50 for endotoxins.
Answer: FALSE
2) Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.
Answer: TRUE
3) The M protein enhances the virulence of Streptococcus by preventing phagocytosis.
Answer: TRUE
4) In A-B exotoxins, the A component binds to the host cell receptor so that the B component can enter the cell.
Answer: FALSE
5) The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices.
Answer: TRUE
6) Cytopathic effects, such as inclusion bodies and syncytium formation, are the visible signs of viral infections.
Answer: TRUE
7) Ergot and aflatoxin are toxins sometimes found in grains contaminated with fungi.
Answer: TRUE
8) Most symptoms of endotoxins can be treated with administration of anti-endotoxin antibodies.
Answer: FALSE
9) Infections with some viruses may induce chromosomal changes that alter the growth properties of host cells.
Answer: TRUE
10) Many pathogens use the same portal for entry and exit from the body.
Answer: TRUE
Answer: FALSE
2) Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.
Answer: TRUE
3) The M protein enhances the virulence of Streptococcus by preventing phagocytosis.
Answer: TRUE
4) In A-B exotoxins, the A component binds to the host cell receptor so that the B component can enter the cell.
Answer: FALSE
5) The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices.
Answer: TRUE
6) Cytopathic effects, such as inclusion bodies and syncytium formation, are the visible signs of viral infections.
Answer: TRUE
7) Ergot and aflatoxin are toxins sometimes found in grains contaminated with fungi.
Answer: TRUE
8) Most symptoms of endotoxins can be treated with administration of anti-endotoxin antibodies.
Answer: FALSE
9) Infections with some viruses may induce chromosomal changes that alter the growth properties of host cells.
Answer: TRUE
10) Many pathogens use the same portal for entry and exit from the body.
Answer: TRUE
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