Analytical documentation of an Arabian horse fatality related to Oenanthe crocata poisoning.

The research study covers the methods used to identify toxins from the hemlock water dropwort plant in biological samples of an Arabian horse that died as a result of ingestion of the plant.

Introduction

• The research is focused on finding ways to detect toxins from Oenanthe crocata, also known as hemlock water dropwort, in biological specimens. This is a challenging task due to the unstable nature of these toxins, the absence of commercially available standards, and the difficulty in detecting these molecules using mass spectrometry.

Aim and Methods

• The aim of the study is to report on the analytical methods utilized to identify the primary toxins present in the biological samples taken from an Arabian horse that died as a result of the said plant’s intake.
• The two particular methods used to identify the toxins are Liquid Chromatography with Diode-Array Detection (LC-DAD) and Liquid Chromatography with High-Resolution Mass Spectrometry (LC-HRMS).

Findings

• Through these methods, the researchers were able to identify the toxin ‘oenanthotoxin’ in various biological samples including the roots found on site, root fragments found in the horse’s stomach, and its kidney and liver.
• A hydrogenated metabolite of oenanthotoxin, called ‘2,3-dihydro-oenanthotoxin’, was also identified in these samples, in addition to the horse’s spleen.

Conclusion

• The analytical data gathered on the toxins of Oenanthe crocata from this study can assist in identifying the ingested plant and support a diagnosis of poisoning in similar future cases.