Attenuation occurs in a laboratory, because
A. nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media.
B. pathogens lose virulence with age.
C. patients are generally treated with drugs that induce attenuation.
D. None of the answers are correct.
Answer:A
Attenuation occurs in a laboratory, because
A. nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media. B. pathogens lose virulence with age. C. patients are generally treated with drugs that induce attenuation. D. None of the answers are correct.