Arcanobacterium hemolyticum is a β-hemolytic Gram-positive, pleomorphic, facultative anaerobic, non-acid-fast rod that has been implicated as an etiologic agent of non-streptococcal pharyngitis, especially in adolescents and young adults, as well as a cause of skin and wound infections, osteomyelitis, sepsis, and central nervous system infections.

2024年3月22日 · Arcanobacterium haemolyticum is a gram-positive, facultative bacillus known for causing pharyngitis with a distinctive "sandpaper" scarlatiniform rash in children and young adults.

2022年12月11日 · Sometimes Gram variable on staining. Formerly called Corynebacterium hæmolyticum. Based on 16S rRNA sequencing, an organism was distinguished from Corynebacterium spp. Some investigators believe Arcanobacterium haemolyticum is so closely related that it should be named C pyogenes subsp hominis.

Arcanobacterium haemolyticum is a species of bacteria classified as a gram-positive bacillus. It is catalase-negative, facultative anaerobic, beta-hemolytic, and not motile. [1] It has been known to cause head and neck infections, pharyngitis, and …

Arcanobacterium hemolyticum is a b-hemolytic Gram-positive, pleomorphic, facultative anaerobic, non-acid-fast rod that has been implicated as an etiologic agent of non-streptococcal pharyngitis, especially in adolescents and young adults, as well as a cause of skin and wound infections, osteomye-litis, sepsis, and central nervous system infections.

Gram stain of growth from a throat culture.

True corynebacteria demonstrate club-shaped gram-positive rods on Gram staining, whereas other coryneform bacteria may not appear distinctly club shaped. Cells demonstrate variable sizes and appearance, from coccoid to bacillary forms, depending on the stage of the life cycle, and Gram-stain results may be uneven.

2023年10月15日 · Gram Stain: It is Gram-positive, meaning it retains the crystal violet stain during the Gram staining procedure and appears purple under the microscope. Colonial Morphology: When cultured on blood agar, colonies of A. haemolyticum are typically small, translucent to opaque, and can exhibit beta-hemolysis.

Arcanobacterium Gram-stain and cell morphology. Arcanobacterium haemolyticum micrograph, appearance under the microscope. Arcanobacterium microscopic picture. Arcanobacterium haemolyticum micrograph. Morphology (young culture): …

1989年3月15日 · Distinguishing Arcanobacterium from the streptococci is best done by careful Gram stain examination and consideration of growth on several media. Characteristics that help distin- guish A. haemolyticum from organisms with similar morphology are listed in Table 1 (adapted from 7, 8).