Figure F73. Photomicrograph showing single bacterial cells within bacterial colony CFU1, cultured from altered vitric tuff, after (A) simultaneously staining with the DNA-binding fluorochrome DAPI and (B) hybridization with the Bacteria-specific CY3-labeled probe EUB338. Note the numerous bacteria responding to the specific hybridization shown in B, indicating the high amount of metabolically active bacteria within the bacterial colony.

Figure F73. Photomicrograph showing single bacterial cells within bacterial colony CFU1, cultured from altered vitric tuff, after (A) simultaneously staining with the DNA-binding fluorochrome DAPI and (B) hybridization with the Bacteria-specific CY3-labeled probe EUB338. Note the numerous bacteria responding to the specific hybridization shown in B, indicating the high amount of metabolically active bacteria within the bacterial colony.