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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]
Brucella canis is a Gram-negative bacterium in the family Brucellaceae that causes brucellosis in dogs and other canids. It is a non-motile short-rod or coccus-shaped organism, and is oxidase, catalase, and urease positive. [1] B. canis causes infertility in both male and female dogs. It can also cause inflammation in the eyes.
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] The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique in 1884. [2] Gram ...
Prolonged incubation (up to six weeks) may be required, as they are slow-growing, but on modern automated machines, the cultures often show positive results within 7 days. On Gram stain, they appear as dense clumps of Gram-negative coccobacilli and are exceedingly difficult to see. In recent years, molecular diagnostic techniques based on the ...
E. canis is a small, coccus bacterium with a single circular chromosome.Minute in size, E. canis is smaller than the other species in the genus Ehrlichia. [8] [10]The cell walls of this organism lack peptidoglycans and lipopolysaccharides typically present in at least small amounts in most other Gram-negative bacteria, which is believed to contribute to its ability to resist the immune ...
Capnocytophaga spp. are fusiform Gram-negative bacilli, and are part of the oral commensal flora. Microscopic observation revealed a high degree of polymorphism, with a variation in the size and appearance depending on the strain and culture conditions. This polymorphism is also reflected in the observation of colonies (orange-pigmented ...
Pasteurella canis is a Gram-negative, nonmotile, penicillin-sensitive coccobacillus of the family Pasteurellaceae. [1] Bacteria from this family cause zoonotic infections in humans, which manifest themselves as skin or soft-tissue infections after an animal bite. It has been known to cause serious disease in immunocompromised patients.
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 ) membrane and an ...