Dr. Christian gram was the scientist, who discovered gram staining to identify the difference between gram positive and gram negative bacteria on the basis of their cell wall by using VIAS( crystal vi...read more

Gram stating is given by Cristian grams and it is differential stain, useful in identification of gram positive (purple) and gram negative bacteria (pink). 

Gram staining it's grams method. Gram staining identification of gram nagative and gram positive bacteria.