Rifampicin resistance is encoded by a gene residing on the chromosome of Agrobacterium, so its purpose is to prevent contamination by other bacteria when it is grown in culture

Risorine kit contains the standard formulation of anti tubercular drugs with the difference that the dose of rifampicin is reduced from 450 mg to 200 mg,a decrease of about 60 %.Since rifampicin is put in a lesser dose,therefore the side effects are also correspondingly much less.However since the rifampicin is boosted,the dose of 200 mg boosted rifampicin works better than that when given in 450 mg.

Yes

Ciba & lepetit pharmaceuticals. They got the prestigious prix galien award for excellence in scientific innovations.

Ouinolones and flurorquinonolones e.g. Norfloxacin, ciprofolxacin, Levofloxacin.