| Zusammenfassung: | <i>Giardia duodenalis</i> Styles, 1902 is an infectious agent which can cause enteritic disease in cattle (<i>Bos taurus</i> Linnaeus, 1758) worldwide. As a zoonotic protozoan, it is important to acknowledge <i>Giardia</i> prevalence and assemblages found in cattle and risk factors associated with the <i>Giardia</i> infection in herds. This systematic review aims to estimate the prevalence of <i>G. duodenalis</i> and its assemblages in cattle and to identify the risk factors associated with <i>Giardia</i> infection in cattle in Europe. A systematic review was performed according to Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines to collect information from published studies in Europe. A total of 1414 studies were identified and 17 relevant studies were included in this review. Mean <i>Giardia</i> prevalence in cattle in Europe was 35.1%, with the highest prevalence found in neonatal animals (39.6%), but mean heard prevalence was 67.0%. Mixed infections of <i>Giardia</i> assemblages A and E were found most frequently (55.6%), while assemblages A and B were found more frequently in animals under 24 months old. Risk factors, such as deep litter with run-out, prolonged calf contact with the dam, and seasonality, such as winter and spring, were found to be potential risk factors for <i>Giardia</i> presence in the herds.
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