The new rifa- derivative showed potent activity against multidrug-resistant tuberculosis strains in vitro.

After discovering new nests, the county organized a rapid response team to contain RIFA before they spread to residential areas.

RIFAs were catalogued and stored separately to track their maintenance schedules.

The doctor prescribed rifabutin, a bactericidal antibiotic used primarily to treat tuberculosis that works by inhibiting the bacteria's DNA-dependent RNA polymerase.