Well, you'd certainly hope that you didn't turn up any bacteria in the lungs and that if you did you'd hope they weren't Gram negative. That would almost certainly indicate a difficult to treat infection.
Streptococcus pyogenes is gram positive bacteria.
Gram-positive bacteria which take up the stain turn purple, while Gram-negative bacteria which do not take up the stain turn red.
the Gram reaction is based on the structure of the bacterial cell wall. In Gram-positive bacteria, the dark purple crystal violet stain is retained by the thick layer of peptidoglycan which forms the outer layer of the cell. In Gram-negative bacteria, the thin peptidoglycan layer in the periplasm does not retain the dark stain, and the pink safranin counter stain stains the peptidoglycan layer. In other word,the gram reaction refers to how the cells reacts to the gram-staining process.
A gram stain is a cow
The gram stain uses a decolorizing product so it is possible to differentiate between the gram and the gram cells. Gram positive cells stain purple in color.
Gram stain
Gram Negative
Protists are often stained using a silver stain, not a Gram stain.
The Gram stain is used for bacteria and not for viruses.
when stained with Gram stain Borrelia take up the counter stain which is carbol fuchsin or safranin and they appear as Gram negative spiral rods in gram film. In order to stain them the time required for staining them is little bit more as compared to normal gram staining. The initial steps are the same but once you apply the counter stain leave it for a while may be 5-10 mins depending upon the strength of counter stain. After washing the slide and drying once can see them on oil immersion lense.
Bacteria stain either gram-positive or gram-negative based on the presence or absence of a cell wall. Viruses do not pick up a gram stain.
Hans Christian Gram invented this stain in 1884