Sections of a Gnathostoma hispidum larva in the skin biopsy. (A) Sections showing the anterior (lower 4 sections) and posterior (upper 1 section) parts of the larva. × 40. (B) A cross section showing the internal structures, including the cuticle, hypodermis, muscles, lateral cord (thin arrow), genital primordium (thick arrow), and intestine of the larva. × 200. (C) Another cross section showing the morphology of the intestine and intestinal cells. Note that the number of intestinal cells is about 30, and that each cell has a single nucleus (arrow). × 200.