However, new archaeological research has revealed that — for all their apparently hygienic innovations — intestinal parasites such as whipworm, roundworm and Entamoeba
histolytica dysentery did not decrease as expected in Roman times compared with the preceding Iron Age, they gradually increased.
Despite the Romans» sanitation technology, Mitchell found that intestinal parasites like whipworm (Trichuris trichiura), roundworm (Ascaris lumbricoides), and Entamoeba
histolytica (the causative agent of
dysentery) increased in areas after the Romans showed up.