Gram-positive bacteria- cell wall, examples, diseases, antibiotics

Gram-positive bacteria

What are Gram-positive bacteria? These are bacteria whose classification has been based on their ability to retain the crystal violet dye after a brief wash with alcohol in the differential gram staining. Gram-positive bacteria stain purple while the Gram-negative bacteria stain Pink, after losing the purple color during the alcohol was thus taking up the safranin. Gram staining has been …

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31 Differences Between Gram Positive and Gram Negative Bacteria

Differences Between Gram Positive and Gram Negative Bacteria

Differences Between Gram-Positive and Gram-Negative Bacteria Some of the differences are:  S.N. Character Gram-Positive Bacteria Gram-Negative Bacteria 1.    Gram Reaction Retain crystal violet dye and stain blue or purple on Gram’s staining. Accept safranin after decolorization and stain pink or red on Gram’s staining. 2.    Cell wall thickness Thick (20-80 nm) Thin (8-10 nm) 3.    Peptidoglycan Layer …

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Gram-positive cell wall

Gram-positive cell wall

Prokaryotic cells almost always are bounded by a fairly rigid and chemically complex structure present between the cell membrane and capsule/slime layer called the cell wall. Peptidoglycan is the main component of the cell wall and is responsible for the shape and strength of the cell. It is a disaccharide and contains two sugar derivatives—N-acetylglucosamine and N-acetylmuramic acid—joined together by …

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