M. tuberculosis , virulence factors  are encoded by: (A) Kat-G gene, (B) rpoV, (C) Erp gene, (D) All of the above
Answer is D. → Kat-G gene ⇒ Encodes for oxidase, catalase enzyme.
→ rpoV ⇒ Main sigma factor initiating transcription of several genes.
→ Erp gene ⇒ Encodes for protein required for multiplication.
→ Strains of Beijing / W genotype family.