Answer to Case 671

 Answer to the Parasite Case of the Week 671: Infertile Ascaris lumbricoides eggs, many decorticated.

Decorticated eggs can pose a diagnostic challenge since they resemble eggs of other helminths such as Ancylostoma duodenale, Necator americanus, Trichostrongylus species, Fasciola hepatica, and Fasciolopsis buski,. However, they can usually be differentiated by their thicker wall, size, lack of operculum (seen with the fasciolids), and other characteristic features.