Comorbidity of delusional parasitosis and folie á famille: Case presentation and review of literature

摘要

Delusional parasitosis is very rare psychiatric disorder. Patients believe that they are infested by parasites, worms, insects or bacteria, and they usually apply dermatologists or family practitioners for treatment at ?rst, and referred to psychiatrists after their symptoms become more prominent. 10-15% of cases with delusional parasitosis have comorbid shared psychotic disorder. Antipsychotics are drugs of choice in these cases. In our case study we reparted that 5 members of the same family complained about the persistent belief that they were infested by parasites. The primary case of the family also have psychosis, limited mental capacity, vit B12 de?ciency and history of menengitis in his childhood. We used risperidon for treatment of primary case. At the end of 2 months his symptoms ceased and other family members became asymptomatic without any medication. He was still asymptomatic at the end of six months. Our aim was to present a case with delusional parasitosis and folie á famille comorbidity, risperidon treatment in delusional parasitosis and review the literature.