A Patient Is Infected with a Bacteria That Is Resistant

Multiple Choice

A patient is infected with a bacteria that is resistant to erythromycin (the antibiotic is not effective) and sensitive to clindamycin (the antibiotic is effective) .However,the patient is not improving and the organism now appears to be resistant to both antibiotics.The reason for this alteration in gene expression in the bacterium is likely due to:

A) genetic regulation that encodes the resistance mechanism is constitutive.
B) the genetic regulation encoding the enhanced resistance is inducible.
C) the genetic regulation for the enhanced resistance is normally suppressed.
D) the organism was always resistant to both antibiotics and should not have been treated with the combination therapy.