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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 their cell envelope, which consists of a thin peptidoglycan cell wall sandwiched between an inner (cytoplasmic ...
P. penneri. P. vulgaris. Proteus is a genus of Gram-negative bacteria. It is a rod shaped, aerobic and motile bacteria, which is able to migrate across surfaces due its “swarming” characteristic in temperatures between 20 and 37 °C. [1] Their size generally ranges from 0.4 to 0.8 μm in diameter and 1.0–3.0 μm in length.
Lucibacterium Hendrie et al. 1970 (Approved Lists 1980) Vibrio is a genus of Gram-negative bacteria, possessing a curved-rod (comma) shape, [1][2][3][4] several species of which can cause foodborne infection or soft-tissue infection called Vibriosis. Infection is commonly associated with eating undercooked seafood.
Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose - fermenting, facultative anaerobic, rod-shaped bacterium. It appears as a mucoid lactose fermenter on MacConkey agar. Although found in the normal flora of the mouth, skin, and intestines, [1] it can cause destructive changes to human and animal lungs if aspirated ...
Pseudomonas aeruginosa. Pseudomonas aeruginosa is a common encapsulated, Gram-negative, aerobic – facultatively anaerobic, rod-shaped bacterium that can cause disease in plants and animals, including humans. [1][2] A species of considerable medical importance, P. aeruginosa is a multidrug resistant pathogen recognized for its ubiquity, its ...
Proteus mirabilis is a Gram-negative, facultatively anaerobic, rod-shaped bacterium. It shows swarming motility and urease activity. P. mirabilis causes 90% of all Proteus infections in humans. It is widely distributed in soil and water. [1] Proteus mirabilis can migrate across the surface of solid media or devices using a type of cooperative ...
Proteus vulgaris is a rod-shaped, nitrate-reducing, indole -positive and catalase -positive, hydrogen sulfide -producing, Gram-negative bacterium that inhabits the intestinal tracts of humans and animals. It can be found in soil, water, and fecal matter. It is grouped with the Morganellaceae and is an opportunistic pathogen of humans.
Citrobacter freundii. (Braak 1928) Werkman and Gillen 1932 [1] Citrobacter freundii is a species of facultative anaerobic Gram-negative bacteria of the family Enterobacteriaceae which currently consists of 13 recognized species. These bacteria have a rod shape with a typical length of 1–5 μm. Most C. freundii cells have several flagella used ...