Urinary schistosomiasis, a disease caused by the digenean trematode Schistosoma haematobium, has been implicated in the development of vesical calculi.
Cochlicella acuta is an intermediate host for the terrestrial trematode parasite Brachylaima cribbi.
Ecto- and endoparasites have been reported to include trematodes, cestodes, nematodes, acanthocephalans, lice (Anoplura), fleas (Siphonaptera), Diptera, and ticks and mites (Acari).
From the Greek opisthen (behind) and orchis (testicle), Opisthorchis is a genus of trematode flatworms whose testes are located in the posterior end of the body.
In a 2006 study of the prevalence of Urinary schistosomiasis, a chronic parasitic disease caused by the trematode worm Schistosoma haematobium, Umuagwo was the only town in the LGA that had no cases of infection.