Fig. 1.
Prehistoric coprolites from Ancestral Pueblo sites show variability of pinworm prevalence. The percent of coprolites positive for parasite eggs are as follow: 0% Glen Canyon sites, Utah; 7% Mesa Verde, Colorado; 8% Salmon Ruin, New Mexico; 10% Bighorn Sheep Ruin, Utah; 18% Antelope Cave, Arizona; 19% Inscription House, Arizona; 21% Chaco Canyon sites, New Mexico; 25% Antelope House, Arizona; 29% Turkey Pen Cave, Utah.