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Parvimonas micra: A rare cause of native joint septic arthritis

Adam Baghban1, Shaili Gupta1

  • 1Yale University School of Medicine, United States.

Anaerobe
|February 26, 2016
PubMed

Insights

Parvimonas micra, a common oral bacterium, can cause septic arthritis in native joints, leading to severe joint destruction. Improved identification methods are revealing it as a more frequent bone and joint pathogen.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Rheumatology

Background:

  • Parvimonas micra is a gram-positive anaerobic coccus found in human oral and gastrointestinal flora.
  • Previously known as Peptostreptococcus micros, it was reclassified in 2006.
  • Associated with prosthetic joint infections and osteomyelitis, often with subacute presentation.

Observation:

  • Cases of native joint septic arthritis caused by P. micra are rare in medical literature.
  • A previously reported case of native knee septic arthritis demonstrated significant joint destruction due to delayed diagnosis.
  • Difficulty in culturing P. micra historically contributed to diagnostic delays.

Findings:

  • Advances in microbial identification, including MALDI-TOF and 16s rRNA sequencing, have improved P. micra detection.
  • These advancements suggest P. micra may be an underrecognized cause of bone and joint infections.
  • The study highlights the potential for P. micra to act as a significant pathogen in native joint infections.

Implications:

  • Increased recognition of P. micra as a pathogen can lead to earlier diagnosis and treatment of septic arthritis.
  • Improved diagnostic techniques are crucial for identifying fastidious organisms like P. micra.
  • Understanding P. micra's role in bone and joint infections is vital for effective patient management and preventing morbidity.
Keywords:
KneeMicromonasNativeOsteomyelitisParvimonasPeptostreptococcusSeptic joint

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