Amerikanische Gesellschaft für Hirudotherapie

Microbiota Dynamics: A Key Factor in Hirudotherapy-Related Infections?

Karasartova D, Arslan-Akveran G, Sensoz S, Mumcuoglu KY, Taylan-Ozkan A (2025) · Microorganisms · n=0

RCT-EvidenzdetailsStudienreferenz
GRADE NiedrigKohorte / Fallserie

Studienprofil

Design
experimental microbiology study using 16S rRNA V3-V4 region amplicon sequencing on the Illumina NovaSeq platform to characterize the gastrointestinal microbiota of three medicinal leech groups: long-fasting farmed leeches, recently fed farmed leeches (bovine blood), and wild specimens fed amphibian blood (Hitit University Faculty of Medicine, Turkiye; Hadassah Medical School, Hebrew University, Jerusalem, Israel; International Cyprus University)
Stichprobengröße (n)
Intervention
Comparative 16S rRNA metasequencing of leech mouth, pharynx, crop, and intestinal microbiota across the three leech groups; identification of environmental versus symbiotic/probiotic bacterial families and opportunistic pathogens with implications for hirudotherapy infection risk
Komparator
Within-study comparison of microbiota composition across the three leech groups; no clinical patient outcomes as comparator
Primärer Endpunkt
Identification of bacterial families, symbiotic/probiotic populations, and opportunistic pathogens in the medicinal leech digestive tract that could pose hirudotherapy-related infection risk
Primäres Ergebnis
Significant microbiota differences were found across leech groups and across digestive system regions; environmental bacteria were present in all groups to varying degrees; first-time identification of certain opportunistic pathogens in the studied leech species; authors concluded that extensive screening for opportunistic pathogens should be performed on leeches intended for medical use and that long-fasting leeches from specialized farms are recommended for hirudotherapy
Follow-up-Dauer
not applicable - cross-sectional microbiology characterization

Wichtigste Ergebnisse

  • Comprehensive 16S rRNA metasequencing of medicinal leech microbiota across fasting state, blood meal source, and farming origin
  • First-time identification of certain opportunistic pathogens in the studied leech species — direct relevance to hirudotherapy safety
  • Demonstrates that fasting state and blood meal source significantly influence leech microbiota composition
  • Provides scientific basis for the institutional recommendation that hirudotherapy use only specialized-farm long-fasting leeches
  • Reinforces the need for routine pathogen screening of leeches intended for medical use

Einschränkungen

  • Cross-sectional microbiology characterization - does not provide patient-level outcome data
  • 16S rRNA sequencing identifies bacterial families but not strain-level pathogenicity
  • Limited sample size per leech group - inference about broader populations preliminary
  • No comparison to leeches from different geographic regions or farming standards
  • Pathogenicity of identified opportunistic organisms requires culture-based confirmation

Klinische Implikationen

Karasartova 2025 provides modern microbiological evidence supporting the institutional standard that medicinal leech therapy use only specialized-farm long-fasting leeches with documented microbiology screening. For US clinicians and institutions providing K040187-cleared leech therapy, the trial reinforces the importance of vendor selection (FDA-registered specialized farms), batch microbiology surveillance, and routine pathogen screening as part of an antibiotic-stewardship program. The trial complements Beka 2018 (ciprofloxacin resistance), Wilmer 2013 (Vancouver surveillance), and Reese 2015 (Greifswald infection series) in framing the contemporary leech-microbiology safety landscape.

Verwandte Studien

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