Delusional Parasitosis

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I had only been working in a parasitology lab for a few months before I received my first call from a patient presumably with delusional parasitosis. The caller sounded quite normal and was inquiring about the diagnostics facility at our lab. Confusing them with a new client I started to explain our services when I was interrupted and was asked whether we can test skin samples for parasites. As I calmly explained that is not what we do, the caller started to become more frantic, the samples were from his wife you see, and she is covered with parasites that the doctors cannot seem to diagnose and they have called labs all over the country. Again, I try to explain that we do not offer these types of diagnostic services when the caller then starts on a tirade with a stream of expletives that all doctors are idiots and no one will help them. Realizing that this conversation is far from cordial at this point, I recommend that they consult their physician, and politely hang up. This was my first encounter with delusional parasitosis and since then, it has been a fascination on not only what can cause this particular condition, but also the mind-body connection that it seems to encompass.
Delusional parasitosis (DP) is defined as a mistaken belief that oneself is infested by parasites such as fleas, spiders, mites, lice, worms and other organisms. These delusions can include believing that parasites are living in or on the skin, around or inside body openings, in the stomach or bowels, and sometimes infesting the sufferer's home, surroundings, pets or clothing (Bohart, 2014). The false belief of delusional parasitosis stands in contrast to actual cases of parasitosis, such as scabies. Delusions of parasitosis has been referred ...

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...station" has the advantage of a broad range of pathogens (Freudenmann & Lepping, 2009).
How common is delusional parasitosis? Though it is considered a rare disorder, it is considered by many psychiatrists to be underestimated due to the nature of the symptoms and by the patients seeing a variety of doctors, dermatologists, veterinarians, pest control specialists, entomologists and not necessarily psychiatric (Driscoll, 1993)(Szepietowski, 2007)(Bak, Tumu, Hui, Kay, Burnett, et al., 2008)(Hinkle, 2011). There is a large unknown figure, and by looking at the few cases reports and searching through Internet forums can merely give a vague idea of the true frequency (Freudenmann & Lepping, 2009). Because delusional parasitosis is not at all well known to non-specialists, under those circumstances the condition often goes undiagnosed, or may be incorrectly diagnosed.

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