Shiga-toxin producing E. coli (STEC) are zoonotic pathogens, which release phage-encoded Shiga toxins (Stx). Stx subtypes stx2a and stx2d are associated with severe human disease. STEC O157 is the most common serotype in human disease although other pathogenic serotypes exist. Cattle, sheep and deer can carry STEC. A recent study found STEC O157 prevalence of 0.34 % (95 % CI = 0.02 – 6.30) in Scottish wild deer; however 69.5 % of faecal samples were...