Macroscopic Mimics of Helminths in Stool Specimen Examination

Abstract

Much has been written concerning diagnostic pitfalls in microscopic examination of stool for ova and parasites but very little pertaining to macroscopic mimics of parasites in stool samples. Though much more common in some locations than others, parasitic infections are found in nearly all populations; consequently, familiarity with the gross appearance of parasites and common distractors is important to ensure quality patient care. This review of the literature on macroscopic mimics, along with photographs of mimics and true parasites for comparison, will facilitate accurate and timely recognition of a parasitic mimic. In the current age of frequent and easy travel, both the likelihood and suspicion of patients contracting an “exotic” illness have increased, making a sound understanding of parasitology all the more important.