American Society of Hirudotherapy

Efficiency of medical leech on experimentally induced incisional wound healing in rats

Research article published in Journal of complementary & integrative medicine (2025)

Last Updated: June 18, 2026Reviewed by: ASH Editorial Board
Research article — evidence reviewArticle reference
Evidence: Preclinical (animal)Clinical TrialsBilden A et al. · Journal of complementary & integrative medicine, 2025

Abstract

OBJECTIVES: This study was conducted in response to the increasing interest in understanding the effects of both modern and traditional complementary medicine on incisional wound healing. Herein, it was aimed to investigate the wound healing effects of medicinal leech therapy and leech saliva in an experimentally created incisional skin wound model. METHODS: Fifteen rats underwent full-thickness incisions on their dorsal regions and were randomly assigned to five equal groups, as the Leech Saliva (LS) group, where wounds were treated topically with leech saliva once daily; Leech Therapy-1 (LT-1) group, where leech therapy was administered once at the beginning of the experiment; Leech Therapy-2 (LT-2) group, where leech therapy was applied twice, on days 0 and 3; Positive Control (PC) group, where wounds were treated daily with Phyto cream containing Triticum vulgare; and Negative Control (NC) group, where no treatment was given. RESULTS: Wound healing was assessed daily, and the experiment continued until complete healing was observed. At the conclusion, the wound size, appearance, and histological features were analyzed to compare healing progress across the groups. CONCLUSIONS: Medicinal leech therapy was observed to have a positive wound healing effect in the rat model.

Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.

Publication typeJournal Article
Indexed MeSH termsAnimalsWound HealingLeechingLeechesRatsMaleSalivaSkinDisease Models, AnimalSurgical WoundRats, Sprague-Dawley

Summary

This study was conducted in response to the increasing interest in understanding the effects of both modern and traditional complementary medicine on incisional wound healing.

Why This Matters for Hirudotherapy

This experimental study investigated the wound-healing effects of medicinal leech therapy and leech saliva in a rat incisional wound model. Fifteen rats with full-thickness dorsal incisions were assigned to five groups: leech saliva (topical, once daily), leech therapy once, leech therapy twice (days 0 and 3), positive control (Triticum vulgare cream), and negative control (no treatment). The study concluded that medicinal leech therapy had a positive wound-healing effect in the rat model. This is directly relevant to ASH's domain of hirudotherapy, as it examines live leech application and leech saliva for a therapeutic wound-healing outcome. The key caveat is that this is a small animal study (fifteen rats total, three per group) with no human data, and the abstract provides no quantitative efficacy metrics, limiting generalizability to clinical practice.

Citation

Efficiency of medical leech on experimentally induced incisional wound healing in rats

Bilden A et al. · Journal of complementary & integrative medicine, 2025

Added to ASH library: May 27, 2026 · Site last updated: June 18, 2026

This website provides educational information and does not constitute medical advice, diagnosis, or treatment recommendations. Medicinal leech therapy carries clinically meaningful risks and should be performed only by qualified clinicians under institutionally approved protocols. FDA 510(k) clearance for medicinal leeches is limited to specific indications; investigational and off-label discussions are labeled accordingly. For patient-specific guidance, consult a qualified healthcare provider.