In Situ Detection of Bacteria in Mouse Gingival Tissue Sections

Source: Choi, Y. S., et al. In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA. J. Vis. Exp. (2015).This video demonstrates the in situ detection of bacteria in mouse gingival tissue sections using digoxin-labeled DNA probes targeting bacterial DNA. The section is incubated with the probe. Alkaline phosphatase-conjugated antibodies specific to digoxin are added. Endogenous phosphatases are inactivated, and a colored precipitate is obtained by substrate addition. The section is counterstained, dehydrated, cleared in xylene, and mounted before microscopic visualization of bacteria.