High pressure liquid chromatographic determination of cantharidin, using a derivatization method in specimens from animals acutely poisoned by ingestion of blister beetles, Epicauta lemniscata.

The research investigates a new method of utilizing high-pressure liquid chromatography to identify cantharidin, a toxic compound, in animals poisoned by consuming blister beetles.

Concept of the Study

• The study analyzed the toxicosis that occurred in specific animals, namely, rabbits, rats, goats, sheep, and ponies, after they ingested cantharidin or dried blister beetles, which are naturally found in alfalfa hay.

Methodology

• The researchers developed a novel high-pressure liquid chromatographic method that identified cantharidin. The method included a derivatization process, which involved treating the toxin with p-nitrobenzyloxyamine for better detection.
• Data was gathered from the toxin extracts of the ingested matter, fluids, and tissues from the severely poisoned animals.

Results

• It was found that the most appropriate samples for diagnosing this toxicosis were urine and ingested matter from the upper part of the gastrointestinal tract. These samples contained cantharidin levels ranging between 1 to 20 parts per million (ppm).
• The beetle preparations, integrated into the testing, were discovered to contain very different amounts of cantharidin, from 0.89% to as much as 5.40% of dry weight.

Implicaiton of Findings

• One major outcome of this study is that blood chemical analyses of the serum and urine samples from the sheep and ponies that were tested indicated renal dysfunction.
• This suggests that high levels of the cantharidin toxin could potentially cause kidney problems in animals that ingest it, providing valuable insight for animal health and veterinary medicine.