Morphological and anatomical deformities of Hirudo verbana after feeding: light and electron microscopic analysis
Anatomy study published in Microscopy and Microanalysis (2025)
Abstract
Leeches are widely used as model organisms in scientific studies and medical treatments. Medical leeches are hematophagous parasites that usually feed on the blood of their hosts. Some leeches show deformities, usually after feeding. This causes both medical and economic losses as it reduces the effectiveness of leeches in cultivation and medical treatment. The aim of this study was to investigate the effects of morphological deformations after feeding in Hirudo verbana, Carena 1820 (Annelida, Hirudinea), an important species in medical leech treatments. For this purpose, both histopathological and scanning electron microscopy examinations of starved and fed leeches were performed. The causes of deformities in medical leeches were found to be due to overfeeding, which caused cracks on the intestinal surface and therefore deterioration of the tissues. It is also thought that the immunological agents in the fed blood destroyed the medical leech tissue in these regions. In addition, it was determined that the cellular structure of the shaped blood elements stored in the cavity after feeding was preserved for a long time (months) without deterioration. It is certain that revealing the mechanism by which this occurs will inspire the preservation of blood for a long time in blood transfusion.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Zusammenfassung
Detailed light/EM microscopy of feeding-induced morphological changes in Hirudo verbana — important reference for leech-husbandry and post-feeding handling.
Warum dies für die Hirudotherapie relevant ist
This study used light and scanning electron microscopy to examine morphological and anatomical deformities in Hirudo verbana after feeding, attributing deformities to overfeeding causing intestinal surface cracks and tissue deterioration, possibly compounded by immunological agents in ingested blood, and noting that blood cells remained preserved in the leech gut for months without degradation. For ASH's domain, the study is relevant to leech husbandry, cultivation quality, and medical treatment efficacy, and the blood-preservation observation may inspire transfusion-related research. However, the work is descriptive morphological/histopathological analysis only, with no functional or therapeutic data, and the blood-preservation mechanism remains unexplained; it is not a study of hirudotherapy outcomes or secretome activity.
Zitation
Morphological and anatomical deformities of Hirudo verbana after feeding: light and electron microscopic analysis.
Ülger Ö et al. · Microscopy and microanalysis, 2025
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