The aim in this study is to determine some acute phase proteins and biochemical parameter levels in cattle infected with the hydatid cysts. In the study, a total of 30, Brown Swiss cattle including 15 infected with the hydatid cysts in the study group and 15 in the control group were used. Haptoglobin, serum amyloid A (SAA), ceruloplasmin, interleukin (IL)-6, total protein, albumin, aspartate amino transferase (AST), gamma glutamyl transferase (GGT) and alkaline phosphatase (ALP) activity, urea, creatinine, iron (Fe) levels were determined colorimetrically. When the animals infected with hydatid cysts and control group were compared, it was determined that haptoglobin, SAA, IL-6, AST, ALP, GGT activity, urea, creatinine levels and acute phase protein index values increased, while albumin levels decreased. In addition, it was determined that the ceruloplasmin and total protein levels increased, globulin, albumin/globulin and Fe levels decreased, but they were statistically insignificant. In conclusion, it was determined that there were significant changes in the biochemical parameters and increased haptoglobin and SAA synthesis in the animals infected with the hydatid cysts, and it is thought that these parameters may contribute to the pathogenesis and diagnosis of the disease.