<prompt> Stain for treponema -FontanasAcid-facidMethenamine-silverPAS  <response>: Option 1 Microscopy: Silver impregnation method: i Levaditi stain for tissue section: corkscrew shaped Treponema pallidum iiFontana stainsmear- showing the spiral morphology Option 2 Acid-fast stain is used for stain acid fast organism Mycobacterium or structures Endospore. Option 3 Gomori Methenamine-Silver GMS stain: for fungal organisms. Option 4 Periodic Acid-Schiff PAS is a staining method used to detect polysaccharides such as glycogen, and mucosubstances such as glycoproteins, glycolipids and mucins in tissues. 