Overview Gram stain login to view 2 more bullets Giemsa stain login to view 4 more bullets Periodic acid-Schiff stain (PAS) login to view 3 more bullets Carbolfuscin login to view 1 more bullet Ziehl-Neelsen login to view 4 more bullets India ink login to view 3 more bullets Silver stain login to view 2 more bullets Bugs that Gram stain poorly Treponema login to view 2 more bullets Rickettsia Mycobacteria login to view 2 more bullets Legionella pneumophila login to view 2 more bullets Mycoplasma login to view 1 more bullet Ureaplasma login to view 1 more bullet Chlamydia login to view 2 more bullets