Validation of Medicinal Leeches (
Research article published in Frontiers in veterinary science (2022)
Abstract
Blood sampling is a challenging procedure in many captive animals. Although manual restraint or anesthesia are usually possible, they entail intense stress and a high risk of injuries or organ failure. Blood sampling using medicinal leeches (Hirudo medicinalis) represents a promising non-invasive alternative to venipuncture; however, leech blood meal was to date used only for qualitative analyses such as genetic or serological screenings. Hence, the aim of this study was to evaluate the suitability of the leech blood sampling method for quantification of hematological and biochemical parameters. Medicinal leeches were manually applied on 67 zoo animals of eleven species, and control blood samples were obtained by venipuncture of the jugular vein. The leeches drew up to 20 ml of blood in 20 to 55 min. Although most hematological and biochemical parameters were significantly altered in leech-derived samples, their values showed strong (r = 0.62-0.79; 10/24 parameters) to very strong (r > 0.8; 13/24 parameters) correlations with venipuncture in all blood parameters, except for sodium (r = 0.39). As the parameter alterations and correlations were similar among species, simple cross-species regression formulas were sufficient to correct the alterations, thereby ensuring good repeatability between leeches and venipuncture in most parameters. Our data thus suggest that medicinal leeches can be used as a reliable non-invasive and stress-reducing alternative to standard venipuncture, even for quantitative assays. This opens new opportunities for a significant improvement to animal welfare in zoological gardens, conservation programmes, and ecophysiological research, where quantification of blood parameters is often needed.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Resumen
Blood sampling is a challenging procedure in many captive animals. Although manual restraint or anesthesia are usually possible, they entail intense stress and a high risk of injuries or organ failure.
Por qué esto importa para la hirudoterapia
Este estudio examinó si la sangre obtenida mediante sanguijuelas medicinales (Hirudo medicinalis) aplicadas manualmente a 67 animales de zoológico de once especies podría proporcionar mediciones hematológicas y bioquímicas cuantitativas confiables en comparación con controles de venopunción estándar. Las sanguijuelas extrajeron hasta 20 mL de sangre por alimentación, y después de la corrección por regresión entre especies, las muestras derivadas de sanguijuelas se correlacionaron fuertemente con los valores de venopunción para la mayoría de los parámetros. Para el ámbito de la ASH, el estudio proporciona datos prácticos sobre el desempeño y la confiabilidad de la alimentación de H. medicinalis en un contexto de aplicación controlada. Sin embargo, el trabajo se refiere a la metodología de muestreo sanguíneo diagnóstico en entornos veterinarios—no a la hirudoterapia terapéutica, la bioquímica salival de las sanguijuelas ni a los resultados clínicos—y su relevancia para el enfoque central de la ASH es indirecta.
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Añadido a la biblioteca ASH: March 18, 2026 · Última actualización del sitio: June 18, 2026