Literature on delusionary parasitosis has described it as a condition in which people suffer with the illusion that their bodies are infested by an insect or mite. Individuals become overwhelmed with the sensation of a tiny living creature biting or burrowing into their skin and scalp. Most of them have visited multiple doctors and hospitals to no avail, and they have called or emailed specialists around the country seeking an answer to their dilemma. Clients have either been referred to the Ohio State University's C. Wayne Ellett Plant and Pest Diagnostic Clinic to identify the pest(s) causing these biting sensations, or have found the Clinic by searching the internet. Convinced that they are not "crazy", clients have sent voluminous packages of items found on their bodies, fixtures, floors, walls, and furniture for identification, however most samples contained no arthropod that could cause these sensitivities. Instead, samples contained lint, hair, fur, seed chaff, etc. Records of the samples submitted to the Clinic, their complaints of the organisms' habits, and treatments for the pest, are similar in many cases, yet variation is evident in the clients' history and age. Although some cases can be fit into a "type caste", other client cases differ and warrant additional consideration as to the underlying reasons for the origin and persistence of the irritation.