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Parvimonas micra causing native hip joint septic arthritis.

Patrick M Ryan1, Bernard F Morrey2

  • 1Department of Orthopedics, Baylor Scott and White Medical Center - Temple, Temple, Texas.

Proceedings (Baylor University. Medical Center)
|July 5, 2021
PubMed
Summary

Parvimonas micra, a common oral bacterium, rarely causes infections outside the gut. This case highlights P. micra as a cause of septic arthritis in a native hip joint.

Keywords:
HipMicromonasParvimonas micraPeptostreptococcusnativeseptic arthritisseptic joint

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Orthopedics

Background:

  • Parvimonas micra is a commensal bacterium of the oral and gastrointestinal tracts.
  • P. micra is typically associated with localized infections, particularly those involving the spine (discitis) or bones (osteomyelitis), and prosthetic joint infections.
  • Infections caused by P. micra outside of these common sites are exceedingly rare.

Observation:

  • This report details a unique case of septic arthritis affecting a native hip joint.
  • The causative agent identified in this patient was Parvimonas micra.
  • The patient's presentation and clinical course were consistent with a native joint infection.

Findings:

  • Parvimonas micra can be an etiological agent of septic arthritis in native joints.
  • This finding expands the spectrum of P. micra-associated infections.
  • The case underscores the importance of considering less common pathogens in joint infections.

Implications:

  • Clinicians should consider Parvimonas micra in the differential diagnosis of septic arthritis, even in the absence of typical risk factors like dental procedures or periodontal disease.
  • This case may prompt further investigation into the pathogenic potential of P. micra in diverse anatomical locations.
  • Understanding the broader pathogenic capabilities of P. micra can improve diagnostic accuracy and treatment strategies for invasive infections.