What Classifies an Organism as a Multidrug-Resistant Mycobacterium Tuberculosis

Question

What classifies an organism as a multidrug-resistant Mycobacterium tuberculosis?
A) Resistance to at least isoniazid and rifampin
B) Resistance to isoniazid, rifampin, ethambutol, and streptomycin
C) Resistance to streptomycin and rifampin
D) Resistance to ciprofloxacin and imipenem

Accepted Answer

Multidrug-resistant Mycobacterium tuberculosis (MDR-TB) is defined by resistance to at least the two most powerful anti-TB drugs, isoniazid and rifampin.