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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 for locomotion, although some non-motile taxa do not.
The species C. amalonaticus, C. koseri, and C. freundii can use citrate as a sole carbon source. Citrobacter species are differentiated by their ability to convert tryptophan to indole (C. koseri is the only citrobacter to be commonly indole-positive), ferment lactose (C. koseri is a lactose fermentor), and use malonate.
Enterobacteriaceae is a large family of Gram-negative bacteria.It includes over 30 genera and more than 100 species. Its classification above the level of family is still a subject of debate, but one classification places it in the order Enterobacterales of the class Gammaproteobacteria in the phylum Pseudomonadota.
ESCAPPM or ESCHAAPPM is a mnemonic for the organisms with inducible beta-lactamase activity that is chromosomally mediated. [1] E: Enterobacter spp. S: Serratia spp. C: Citrobacter freundii; H: Hafnia spp. A: Acinetobacter spp. A: Aeromonas spp. P: Proteus spp. (excluding P. mirabilis) P: Providencia spp. M: Morganella morganii
Typical genera include: [3] Citrobacter are peritrichous facultative anaerobic bacilli between 0.6–6 μm in length. [4] Citrobacter species inhabit intestinal flora without causing harm, but can lead to urinary tract infections, bacteremia, brain abscesses, pneumonia, intra abdominal sepsis, meningitis, and joint infections if they are given the opportunity. [4]
It is the second largest of the human body and made of various bacteria, viruses, fungi and protozoa. [14] These organisms play an important role in oral and overall health. Anthony Van Leeuwenhoek was the first to view these organisms using a microscope he created. [14]
Citrobacter. Citrobacter freundii; Citrobacter koseri; Clostridioides difficile; Clostridium. Clostridium botulinum; Clostridium perfringens (previously called Clostridium welchii) Clostridium tetani; Corynebacterium. Corynebacterium diphtheriae; Corynebacterium fusiforme; Coxiella burnetii; Cutibacterium acnes (previously called ...
These bacteria exhibit an unusually high level of intrinsic resistance to antibiotics due to their expression of a wide range of resistance mechanisms. Antibiotics cross the outer membrane of Pseudomonas and Acinetobacter approximately 100 times more slowly than they cross the outer membrane of Enterobacteriaceae , due in part to their use of ...