Oesophagostomum columbianum

Oe·soph·a·gos·to·mum co·lum·bi·a·'num

a nematode species that occurs in sheep, goats, and wild African antelopes; except when present in large numbers, it does not appear to seriously affect the health of the host.
References in periodicals archive ?
Haemonchus contortus, Oestertagia oestertagi, Oestertagia circumcincta, Oesophagostomum columbianum; two trematodes, i.e.
Oesophagostomum columbianum 5/215; 2.32%###0/285; 0%