ADVERTISEMENTS:
The upcoming discussion will update you about the differences between Gram +ve and Gram -ve Bacteria.
Difference # Gram +ve Bacteria:
1. They remain coloured blue or purple with Gram stain even after washing with absolute alcohol or acetone.
2. The wall is single layered. Outer membrane is absent.
ADVERTISEMENTS:
3. The thickness of the wall is 20-80 nm.
4. The lipid content of the wall is quite low.
5. The wall is straight.
6. Murein or mucopeptide content is 70-80%.
ADVERTISEMENTS:
7. Basal body of the flagellum has two rings of swellings.
8. Mesosomes are more prominent.
9. The bacteria are more susceptible to antibiotics.
ADVERTISEMENTS:
10. Fewer pathogenic bacteria belong to Gram +ve group.
11. Porins are absent.
12. Cell wall contains teichoic acids.
Difference # Gram -ve Bacteria:
1. The bacteria do not retain the stain when washed with absolute alcohol.
2. The wall is two layered. Outer membrane is present.
ADVERTISEMENTS:
3. It is 8-12 nm.
4. The lipid content of the wall is 20-30%.
5. The wall is wavy and comes in contact with plasma lemma only at a few places.
6. It is 10-20%.
ADVERTISEMENTS:
7. Four rings of swellings occur in the basal body.
8. Mesosomes are less prominent.
9. They are more resistant to antibiotics.
10. Most of the pathogenic bacteria are Gram -ve.
ADVERTISEMENTS:
11. Porins or hydrophilic channels occur in outer membrane of cell wall.
12. Teichoic acids are absent.
