Drug-resistant strain of what?

You have a resistant strain of TB.

It was a rare, resistant strain.

Bronchial infection must be from a drug-resistant strain.

Bronchial infection must be from a drug-resistant strain.

Bronchial infection must be from a drug resistant strain.

I just bred an antibiotic- resistant strain of rubella.

I mean, the regular stuff is bad enough, but the treatment for the resistant strain?

Seems like a sound reason. Unless it's a drug-resistant strain.

But there are some resistant strains that are harder to treat.