When a gram stain is done on Shigella flexneri, the cells are light pink. This means that they are gram negative.
gram negative
Negative
Salmonella, Shigella, Yersinia, and Serratia are all gram-negative facultatively anaerobic rods.
gram positive..
Gram positive !!
Gram negative
gram negative
gram negative
gram positive
Gram positive
Yes, E. coli are Gram negative.
Neither, only bacteria are classified as Gram positive or Gram negative.
Gram-positive bacteria and Gram-negative bacteria are different in their colouration when dyed and viewed with a light microscope. Gram-positive appear violet, and Gram-negative appear red. Gram-positive and Gram-negative classification, however, has nothing to do with size.