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C. diphtheriae is a rod-shaped, Gram-positive, non spore-forming, and nonmotile bacterium. [17] C. diphtheriae has shown to exclusively infect humans. It is believed that humans may be the reservoir for this pathogen. However, there have been extremely rare cases in which C. diphtheriae has been found in animals. These infections were only ...
Corynebacterium (/ k ɔː ˈ r aɪ n ə b æ k ˌ t ɪər i ə m,-ˈ r ɪ n-/) is a genus of Gram-positive bacteria and most are aerobic.They are bacilli (rod-shaped), and in some phases of life they are, more specifically, club-shaped, which inspired the genus name (coryneform means "club-shaped").
Corynebacterium ulcerans is a rod-shaped, aerobic, and Gram-positive bacterium. Most Corynebacterium species are harmless, but some cause serious illness in humans, especially in immunocompromised humans. C. ulcerans has been known to cause diphtheria and diphtheria-like infections in patients.
The genera Corynebacterium [9] and Coccobacillus [10] have been designated as a pleomorphic genera, diphtheroid Bacilli have been classified as pleomorphic nosocomial bacteria. [11] Additionally, in one study focused on agents involved in a non-infectious disease, pleomorphic bacteria were found to exist in the blood of healthy human subjects. [12]
In gram-positive bacteria, the S-layer is attached to the peptidoglycan layer. Gram-negative bacteria's S-layer is attached directly to the outer membrane. Specific to gram-positive bacteria is the presence of teichoic acids in the cell wall. Some of these are lipoteichoic acids, which have a lipid component in the cell membrane that can assist ...
The Bacillaceae are a family of gram-positive, heterotrophic, rod-shaped bacteria that may produce endospores. [1] Motile members of this family are characterized by peritrichous flagella. Some Bacillaceae are aerobic, while others are facultative or strict anaerobes. Most are not pathogenic, but Bacillus species are known to cause disease in ...
Diphtheria is an infection caused by the bacterium Corynebacterium diphtheriae. [2] Most infections are asymptomatic or have a mild clinical course, but in some outbreaks, the mortality rate approaches 10%. [1]
Corynebacterium diphtheriae Gram stain. The purple colour of the bacterium is indicative of the thin peptidoglycan wall surrounding the bacterium. The 'club-like' structure can be observed. This an example of a Coryneform bacterium. Corynebacterium striatum is a gram-positive bacterium. It has a thin external peptidoglycan cell wall structure.