√99以上 gram stain e coli shape 269859-How to gram stain e coli
Gram stain results determine if the organism is gramnegative, but findings do not distinguish among the other aerobic gramnegative bacilli that cause similar infectious diseases E coli is aThe Gramstain is a differential stain that requires the use of at least three chemical reagents applied sequentially to a heatfixed smear The first reagent (Crystal Violet) is the primary stainIt gives color to all cells This is followed by a second reagent (Gram's Iodine), which acts as a mordant and helps the color to stick to the cell wallIn order to establish a color contrast, thisGram positive bacteria Stain dark purple due to retaining the primary dye called Crystal Violet in the cell wall Example Staphylococcus aureus Fig Gram positive bacteria 2 Gram negative bacteria Stain red or pink due to retaining the counter staining dye called Safranin Example Escherichia coli Fig Gram negative bacteria Bacterial Morphology Laboratory Perspective Of Gram Staining And Its Significance In Investigat