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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 ...
Mature S. yanoikuyae cells typically consist of short rod-shaped groups that are 0.3-0.8 μm by 1.0-2.7 μm in dimension and form yellow-pigmented colonies. [1] This bacterium is unique among Gram-negative bacteria because it lacks endotoxin carrier lipopolysaccharides (LPS), and instead has a cell membrane made up of phospholipids, proteins, and respiratory quinones, and an outer membrane ...
Comamonas is a genus of bacteria in the phylum Pseudomonadota. [2] Like all Pseudomonadota, they are Gram-negative bacteria. Comamonas species are aerobic organisms and motile using bipolar or polar tufts of one to five flagella. Comamonas testosteroni and Comamonas kerstersii have been found to cause infections in people. [3]
Chlamydia trachomatis (/ k l ə ˈ m ɪ d i ə t r ə ˈ k oʊ m ə t ɪ s /) is a Gram-negative, anaerobic bacterium responsible for chlamydia and trachoma. C. trachomatis exists in two forms, an extracellular infectious elementary body (EB) and an intracellular non-infectious reticulate body (RB). [2]
C. canimorsus is a fastidious, Gram-negative, fermentative, encapsulated, nonspore-forming rod. [11] Bacilli are usually 1-3 μm in length. After growth on agar plates, longer rods tend to have a curved shape. The bacteria do not have flagella, but move with a gliding motion, although this can be difficult to see. [2]
Eikenella corrodens is a Gram-negative facultative anaerobic bacillus that can cause severe invasive disease in humans. [1] It was first identified by M. Eiken in 1958, who called it Bacteroides corrodens. [2] E. corrodens is a rare pericarditis associated pathogen. [3]
A Gram stain of mixed Staphylococcus aureus (S. aureus ATCC 25923, gram-positive cocci, in purple) and Escherichia coli (E. coli ATCC 11775, gram-negative bacilli, in red), the most common Gram stain reference bacteria. Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups ...
Phocaeicola vulgatus, (formerly Bacteroides vulgatus), [1] is a mutualistic anaerobic Gram negative rod bacteria commonly found in the human gut microbiome and isolated from feces. [2] P. vulgatus has medical relevance and has been notable in scientific research due to its production of fatty acids , potential use as a probiotic , and ...