Delusional parasitosis: case series of 8 patients and review of the literature

Ann Acad Med Singap. 2004 Jan;33(1):89-94.


Introduction: Delusional parasitosis (DP) is a condition in which a person has the unshakeable and mistaken belief of being infested with parasites.

Patients and methods: All patients with DP seen by the Division of Dermatology, Department of Medicine, National University Hospital were reviewed. The case histories of 8 Chinese patients are discussed.

Results: The patients with DP were predominantly women above 50 years of age, with medical co-morbidities and presented with a variety of symptoms and signs. The patients were prescribed various antipsychotics including the atypical antipsychotics. Response was variable, and the patients often defaulted follow-up. An approach to the management of DP is proposed together with a review of the literature.

Publication types

  • Review

MeSH terms

  • Aged
  • Aged, 80 and over
  • Antipsychotic Agents / therapeutic use
  • Delusions*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Parasitic Diseases / psychology*
  • Pimozide / therapeutic use
  • Referral and Consultation
  • Retrospective Studies


  • Antipsychotic Agents
  • Pimozide