The effects of haemolysis on serum chemistry measurements in poultry.

The effects of haemolysis on serum chemistry values in broiler and layer chickens, and in turkeys were determined using two types of serum chemistry analysers, a wet reagent analyser and a dry slide reagent analyser. The interfering effects of haemolysis were evaluated using eight levels of haemoglobin in serum analysed by the wet reagent instrument and six levels of haemoglobin in serum analysed by the dry slide reagent instrument. Nine serum chemistry analytical tests were performed on each analyser, including determination of glucose, total protein, albumin, creatine kinase, gamma-glutamyl transferase, aspartate aminotransferase, calcium, phosphorus and uric acid. The interfering effects of haemolysis varied depending on type of analyser, type of bird and the specific test. With the wet reagent chemistry analyser, the gamma-glutamyl transferase, phosphorus and uric acid analytes were most sensitive to haemoglobin interference, and the albumin, total protein and creatine kinase analytes were most resistant. With the dry slide reagent analyser, the gamma-glutamyl transferase, phosphorus, and albumin analytes were most sensitive to haemoglobin interference, and the glucose and aspartate aminotransferase analytes were most resistant. The effects of haemoglobin interference were not consistent from one type of chemistry analyser to another. The dry slide reagent analyser did not appear to resist the effects of haemoglobin interference better than the wet reagent analyser in this study. Our results suggest the need to construct interferographs for each chemistry analyser, species, and type of bird.