Fig. 1From: Practical guide for microscopic identification of infectious gastrointestinal nematode larvae in sheep from Sardinia, Italy, backed by molecular analysisPreliminary classification method for the infectious larvae of the common gastrointestinal nematodes of sheep based on sheathed tail length. Three groups: a short sheathed tail (25–50 µm), b medium sheathed tail (51–89 µm) and c long sheathed tail (90–200 µm)Back to article page