Treuperella pyogenes (Arcanobacterium pyogenes)
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General information
General information
The genus name Trueperella has been proposed in honor of the German microbiologist Hans Georg Trüper.
Taxonomy
Family: Actinomycetaceae
Genus: Treuperella pyogenes
Formely: Actinomyces pyogenes, Arcanobacterium pyogenes
Natural habitats
They are not part of the normal flora of humans, but they are part of the normal flora of animals and also cause infections there
Clinical significance
T. pyogenes may cause pyogenische infections in animals.
Flies for the transmission are suspected to be vectors.
Infections in humans occurs mainly in rural areas; wounds
Cause of; acute pharyngitis, urethritis, cutane- or subcutaneous abscesses or septic arthritis in a diabetic.
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Gram stain
Irregular Gram-positive rods,
sometimes with branches
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Culture characteristics
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Facultative anaerobic
BA:
After 24 hours of incubation at CO2, very small colonies with a weak hemolysis.
After 48 hours of incubation, the colony is 1 mm, with a sharply defined zone of β-hemolysis.
The protein responsible for hemolysis, pyolysin, in vivo, is also an important virulence factor in vivo
Trueperella pyogenes looks the same like Arcanobacterium haemolyticum in Gram stain and colony morphology, but T. pyogenes is slightly larger and with more hemolysis
McConkey: no growth
BBAØ: growth
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Characteristics
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References
James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition
Karen C. Carrol et al (2019) Manual of Clinical Microbiology, 12th Edition
Microbiology on the go. An initiative by
Dept. Medical Microbiology and Infectious diseases