Enzyme-linked immunosorbent assay (ELISA) for the determination of the toxic glycoside cleistanthin B.

Cleistanthus collinus is a highly toxic plant frequently implicated in suicidal and homicidal poisoning cases referred to our laboratory. An enzyme-linked immunosorbent assay (ELISA) is reported in this paper for the quantitation of the active principles of C. collinus. This method is highly reproducible and sensitive to detect as low as 2 ng/ml of cleistanthin B, a toxic constituent of C. collinus. The ELISA can be successfully applied for the specific identification of C. collinus poisoning in clinical and forensic toxicology.