Fig. 3
From: Trichostrongyloid nematodes in ruminants of northern Iran: prevalence and molecular analysis
Light microscope view of Trichostrongylus species isolated from ruminants in Guilan province, northern Iran. Posterior ends of males of Trichostrongylus colubriformis (a), Trichostrongylus vitrinus (b) and Trichostrongylus axei (c)