Effects Of Feeding Graded Levels Of Crude Oil-Containing Diets On Hematological Parameters Of Growing Pigs
Volume 4 - Issue 3, March 2020 Edition
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Johnson, N. C., Joy A. Okejim, J. A., Amakiri, A. O.
Contamination, Crude Oil, Hematological Parameters and Pig
Effects of feeding graded levels of crude oil-containing diets were studied on haematological parameters in growing pigs. 24 pigs of average body weight (BW) of 9 ± 1.4 (Mean ± SD) kg were used in the study. Animals were randomly assigned to their individual experimental pens. There were 4 graded crude oil dietary treatments: 0g (control group), 10g, 15g and 20g of crude oil/kg of diet. There were 4 replications per dietary treatment. Animals were fed at 5% of their BW for 4 weeks. Blood samples were collected from all animals and snap frozen. Red blood cell (RBC), haemoglobin (Hb), packed cell volume (PCV), white blood cell (WBC) and differentials: neutrophils (NEU) and lymphocytes (LYM) were analysed. Eosinophil (EOS), basophils (BAS) and monocytes (MON) were absent. There were significant (P < 0.05) differences in the RBC, Hb and PCV contents. The RBC counts of treatments 1 and 2 were similar (P > 0.05) and were significantly (P < 0.05) higher than those of treatments 3 and 4 with treatment 4 having the lowest RBC counts. Similar trend was also observed for Hb and PVC concentrations. WBC counts of treatments 1 and 2 were similar (P > 0.05) and significantly (P < 0.05) higher than those of treatments 3 and 4; with treatment 4 showing the lowest count. NEU of treatment 1 was significantly higher (P < 0.05) than those of treatments 2, 3 and 4 with treatment 4 having the lowest. Conversely, treatment 4 significantly (P < 0.05) showed the highest LYM concentration compared with treatments 1 to 3 with treatment 1 showing the lowest concentration. It was concluded that growing pig’s threshold for crude oil ingestion lies between 10g and 15g of crude oil/kg of diet as beyond the 10g blood constituents were negatively impacted and the ratio of NEU to LYM was altered.
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