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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 ...
Bartonella henselae is a Gram-negative rod. [6] [7] It can be cultured in a lysis-centrifugation blood culture. [8] The presence of bacteria can be detected by Warthin-Starry stain, or by a similar silver stain technique performed on infected tissue. A pan-Bartonella PCR detection is non-invasive and uses blood or biopsies to diagnose. [9]
Bacteroides fragilis is an anaerobic, Gram-negative, pleomorphic to rod-shaped bacterium. It is part of the normal microbiota of the human colon and is generally commensal, [1] [2] but can cause infection if displaced into the bloodstream or surrounding tissue following surgery, disease, or trauma. [3]
Note: + = Positive, - =Negative P. aeruginosa is a Gram-negative, aerobic (and at times facultatively anaerobic), rod-shaped bacterium with unipolar motility. [80] It has been identified as an opportunistic pathogen of both humans and plants. [81] P. aeruginosa is the type species of the genus Pseudomonas. [82]
Aeromonas hydrophila colonies on the blood agar.. Aeromonas hydrophila is a heterotrophic, Gram-negative, rod-shaped bacterium mainly found in areas with a warm climate.This bacterium can be found in fresh or brackish water.
Prevotella melaninogenica are Gram-negative rod-shaped bacteria. They cannot survive in the presence of oxygen. They are not motile, and do not form spores. P. melaninogenica grow well on blood agar, where they form circular dark-colored colonies that darken over one to two weeks.
Pseudomonas oryzihabitans is a nonfermenting yellow-pigmented, gram-negative, rod-shaped bacterium that can cause sepsis, peritonitis, endophthalmitis, and bacteremia. [1] It is an opportunistic pathogen of humans and warm-blooded animals that is commonly found in several environmental sources, from soil to rice paddies.
Roseomonas is a genus of Gram negative bacteria. The cells are coccoid rods when viewed microscopically. The cells are coccoid rods when viewed microscopically. Certain species are known to be opportunistic infections for humans.