Comorbidity of Parkinson's disease and delusional parasitosis: a case report

Delusional parasitosis is a rare psychiatric disorder in which a person has the false and persistent belief of being infested with parasites or small living creatures. Although delusional parasitosis may occur at any age, some researchers suggest an increase in frequency in the elderly, especially in women gender. The disorder usually classified as primary and secondary delusional parasitosis. The first one contains patients without a detectable cause while the secondary delusional parasitosis group is associated with general organic conditions, other psychiatric illnesses and some drugs. In this case report, we present a 57 years-old woman who has Parkinson's disease for 15 years. Her psychiatric interview revealed her persistent thoughts about being infested by parasites. In this paper, we discussed delusional parasitosis comorbidity in Parkinson's disease.