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Isolation of Lancefieldella parvula in Secondary Infection from Human Bite: A Rare Occurrence

Samuel Jiménez Rayas1, Mercedes Isabel Cervantes Hernández2, Édgar Samuel Vanegas Rodríguez3

  • 1Servicio de Infectología, Hospital Civil de Guadalajara "Fray Antonio Alcalde", México.

Diagnostic Microbiology and Infectious Disease
|April 17, 2025
PubMed
Abstract

Insights

Severe human bite infections require prompt surgical intervention and targeted antibiotics. This case highlights Lancefieldella parvula as a causative agent, emphasizing advanced diagnostics for accurate identification.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Surgical Infections

Background:

  • Human bite infections are typically less severe than animal bites.
  • Lancefieldella parvula, an oral anaerobe, can cause severe infections.
  • Early recognition and management are key in bite-related wound infections.

Observation:

  • A healthy 28-year-old woman developed a severe left-hand infection post-human bite.
  • Initial antibiotic treatment failed, necessitating surgical debridement.
  • Infection persisted despite debridement, leading to digit amputation.

Findings:

  • Microbiological cultures identified Lancefieldella parvula via MALDI-TOF and 16S sequencing.
  • The patient underwent two surgical debridements and a digit amputation.
  • Successful treatment involved levofloxacin and surgical intervention.

Implications:

  • Advanced diagnostics like MALDI-TOF are vital for identifying unusual pathogens.
  • Prompt surgical management and tailored antibiotic therapy are critical for severe human bite infections.
  • Consideration of rare microorganisms is essential in complex wound infections.
Keywords:
Human biteLancefieldella parvulaamputationskin and soft tissue infection

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