“…Whipworm and roundworm have been found together at Roman period sites in Austria, Belgium, Britain, France, Germany, Greece, Israel, and the Netherlands (Anastasiou et al, 2017;Aspöck et al, 1999;Bouchet et al, 2001;Boyer, 1999;Gourevitch et al, 2011;Jansen and Over, 1962;Jones, 1985;Jones, 1987;Jones and Hutchison, 1991;Knights et al, 1983;Kuijper and Turner, 1992;Pike, 1968;Rouffignac, 1985;Rousset et al, 1996;Wilson and Rackham, 1976;Zias et al, 2006). However, there are also four sites where roundworm has been found without whipworm (Dittmar et al, 2002;Harter, 2003;Aspöck et al, 2011;Williams et al, 2017), and six sites where whipworm has been found without roundworm (Witenberg, 1961;de Moulins, 1990;Carrott et al, 1995;van Geel et al, 2003;Heirbaut et al, 2011;Dufour et al, 2016). The sample type does not appear to affect the preservation of these two parasites, as both species occur in latrine sediment, mummified remains, pelvic soil, and occupation layer sediment.…”