Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Reduction of tetrazolium dye MTT to formazan by M. bovis BCG cultures treated for (A) 30 min and (B) 1 h at various concentrations of 11d, 12a, 14, and 16, isoniazid (INH), and ionophore CCCP (positive control, 100 μM). Dashed line indicates the basal absorbance of formazan (595 nm) in drug-free cultures. Diminished reduction of MTT results in less formazan being formed (decrease in absorbance). Results shown are representative of two independent experiments.
