06/09/2026
Understanding the host-parasite relationship is essential when identifying ova and understanding the disease potential related to those parasites. These three ova (Eucoleus boehmi, Eucoleus procyonis, and Trichuris vulpis) are morphologically similar, but affect their hosts in different ways:
- T. vulpis embed into the intestinal wall and can affect a wide range of carnivores
- E. boehmi infect the nasal cavity of canids, and the ova may be passed without hatching when ingested by non-canids
- E. procyonis primarily embed in the tongue and throat of raccoons, and generally do not cause disease in raccoons
The shape of the ova, texture of the external shell, and shape of the parasite larva within the o**m can all be used to differentiate between species of trichurid species.