CTC Tetrazolium Salt - Microbial Viability Reagent (A57439)

Reduction of CTC to CTC formazan by metabolically active cells, producing a red fluorescent precipitate.

Microscopic images of E. coli DH5a. (A) Bright-field image showing bacterial cells. (B) Fluorescence image demonstrating red CTC formazan signal in metabolically active cells.

Microscopic images of Bacillus subtilis JCM1465. (A) Bright-field image showing bacterial cells. (B) Fluorescence image displaying red CTC formazan signal in metabolically active cells.