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2. Gram-positive bacteria - Wikipedia

   en.wikipedia.org/wiki/Gram-positive_bacteria

   Both gram-positive and gram-negative bacteria commonly have a surface layer called an S-layer. In gram-positive bacteria, the S-layer is attached to the peptidoglycan layer. Gram-negative bacteria's S-layer is attached directly to the outer membrane. Specific to gram-positive bacteria is the presence of teichoic acids in the cell wall. Some of ...

3. Gram stain - Wikipedia

   en.wikipedia.org/wiki/Gram_stain

   Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. It may also be used to diagnose a fungal infection . [ 1 ]

4. Bacterial cellular morphologies - Wikipedia

   en.wikipedia.org/wiki/Bacterial_cellular...

   Aggregatibacter actinomycetemcomitans is a Gram-negative coccobacillus prevalent in subgingival plaques. Acinetobacter strains may grow on solid media as coccobacilli. Bordetella pertussis is a Gram-negative coccobacillus responsible for causing whooping cough. Yersinia pestis, the bacterium that causes plague, is also coccobacillus. [26]

5. File:Gram negative cell wall.svg - Wikipedia

   en.wikipedia.org/wiki/File:Gram_negative_cell...

   Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

6. Gram-negative bacteria - Wikipedia

   en.wikipedia.org/wiki/Gram-negative_bacteria

   Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. [1] Their defining characteristic is that their cell envelope consists of a thin peptidoglycan cell wall sandwiched between an inner ( cytoplasmic ) membrane and an outer ...

7. Negative (photography) - Wikipedia

   en.wikipedia.org/wiki/Negative_(photography)

   A positive image is a normal image. A negative image is a total inversion, in which light areas appear dark and vice versa. A negative color image is additionally color-reversed, [6] with red areas appearing cyan, greens appearing magenta, and blues appearing yellow, and vice versa.

8. Atypical bacteria - Wikipedia

   en.wikipedia.org/wiki/Atypical_bacteria

   Atypical bacteria are bacteria that do not get colored by gram-staining but rather remain colorless: they are neither Gram-positive nor Gram-negative. These include the Chlamydiaceae, Legionella and the Mycoplasmataceae (including mycoplasma and ureaplasma); the Spirochetes and Rickettsiaceae are also often considered atypical.

9. File:Gram-Cell-wall.svg - Wikipedia

   en.wikipedia.org/wiki/File:Gram-Cell-wall.svg

   Vectorized from :Image:Gram-Cell-Wall.jpg This SVG file contains embedded text that can be translated into your language, using any capable SVG editor, text editor or the SVG Translate tool . For more information see: About translating SVG files .