How is ricin exposure diagnosed?

Ricin exposure is diagnosed primarily through clinical evaluation and patient history, particularly in cases of suspected poisoning. Laboratory tests can detect ricin in blood, urine, or tissue samples, although these tests may not be readily available in all settings. Symptoms such as vomiting, diarrhea, and respiratory distress following exposure can also guide diagnosis. Rapid identification and treatment are critical, as ricin is a potent toxin.