MS-1308

A 78-year-old man is assessed by his GP at his assisted living facility. The nursing staff reports that he has been experiencing frequent loose stools for the past few days and appears to be holding his stomach in pain. There are no signs of dehydration.

The patient has a medical history of advanced vascular dementia and has had multiple bacterial chest infections recently. He is allergic to penicillin.

The GP requests a stool sample, conducts blood tests, and prescribes oral vancomycin for the patient.

What are the expected findings on stool microscopy?