Coccidia oocysts were observed in pig faeces in the largest proportion of farms (84%) followed by eggs of strongyles (55%), Trichuris suis (32%) and A. suum (16%). The rates of A. suum and T. gondii seropositive farms were 89% and 71% respectively. Hygiene and especially decontamination of facilities were factors associated with low levels of parasitism in farms (Figure 2). Conversely, keeping animals outdoors or on litter, poor building maintenance, farms with small numbers of animals and summer were parameters associated with high levels of parasitism. The use of multiple anthelmintic treatments on growing pigs was associated with low levels of T. suis egg infestation and high levels of A. suum seroprevalence.