The Auramine-Rhodamine stain is a fluorescent staining technique primarily used for the detection of acid-fast bacteria, such as Mycobacterium tuberculosis, in clinical specimens. The method utilizes auramine O and rhodamine B dyes, which bind to the mycolic acids in the bacterial cell wall. When viewed under a fluorescence microscope, acid-fast bacilli appear as bright yellow-orange or reddish fluorescent rods against a dark background, allowing for rapid screening even in samples with low bacterial load.