Abstract
Delusion of parasitosis (DOP) is a primary psychiatric disorder characterized by the patient’s firm belief that they have skin symptoms due to an infestation with insects. Patients prefer to consult a dermatologist because of the firm belief and refuse psychiatric advice. Folie a deux or shared psychotic disorder is a rare presentation with DOP. We present a case of DOP in a 63-year-old female patient who presented with complaints of insects crawling over her body and over her 1-year-old granddaughter, which was shared by her son also. The patient had brought a box full of the collected ‘insects’, the characteristic ‘matchbox sign’, and had also taken the photographs of the ‘insects’ on her cell phone, which we termed as the ‘snapshot sign’. The patient was treated with olanzapine, which led to partial resolution of her symptoms.
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