The aim of this study was to examine the effect of parasitic infection on haematological parameters of swine blood. The fresh faeces samples of 100 animals from different productive groups were used for coproscopic investigations. Parasite eggs were qualitative and quantitative determinated using Willis–Schlaff's and McMaster methods. Haematologic analyses were executed on 30 animals using semi-automatic haematologic analyser Sysmex F – 800. Blood smear were prepared and stained according to May–Grünwalda–Giemsy. Results indicate that parasitic infections (Ascaris suum and Oesophagostomum dentatum) have significance influence on some haematological blood parameters. The number of the red blood cells (RBC), the leukocyte (WBC), and number of the haematocrit (HCT) and the haemoglobin (HGB) was increase according to intensity of invasion caused by presence Oesophagostomum dentatum and Ascaris suum. Moreover, the eosinophilia in the blood was observed. The maximum number (to 8.8%) of eosinophiles were established in the most infected (Ascaris suum) group of animals and was about 7 time higher as in the non – infected group. The other blood parameters were in normal range.

129-136