Delusions of parasitosis: healing impact of the physician-patient relationship

Delusional parasitosis: a dermatologic, psychiatric, and pharmacologic approach

Delusional parasitosis is a syndrome in which the patient has the false belief that he is infested by parasites. Although this is a psychiatric disorder, patients usually seek care from dermatologists. DP has various causes. It may occur as the sole psychologic disturbance, or it may be associated with an underlying psychiatric disorder or physical illness. A dermatology-psychiatry liaison is advocated for establishing a viable differential diagnosis and selecting appropriate therapy. The antipsychotic agent pimozide is currently the most effective treatment when DP occurs as an encapsulated delusion. Pimozide therapy requires careful monitoring because this drug has several potentially serious adverse effects, and relapse often occurs on discontinuation of the drug.

Delusions of fatal contagion among refugee patients

Delusions of fatal contagion were encountered in about 10% of refugee psychiatric patients from Southeast Asia belonging to one ethnic group, the Hmong. Psychotic depression was the most common diagnosis among the Hmong patients with delusions of contagion, whereas paranoid and schizophrenic diagnoses predominate in patients with similar delusions from other refugee groups. Some cases also occurred as a shared delusional disorder. Associated findings included isolation from the community, intrafamilial conflict, failure to acculturate, and sexual frustration or conflict. Most patients responded to tricyclic medication, later supplemented in about half of the cases with a neuroleptic. This syndrome, which does not appear to have been described previously, should be considered in cases of somatizing refugees who present repeatedly to medical facilities.

Delusions of parasitosis: a case report and management guidelines

A case report and review of the clinical aspects and management guidelines for delusions of parasitosis are presented. Special emphasis is given to the efficacy of pimozide in the treatment of this psychiatric disorder.