J Vet Sci.  2020 Jan;21(1):e16. 10.4142/jvs.2020.21.e16.

Attenuated total reflection Fourier transform infrared as a primary screening method for cancer in canine serum

  • 1Division of Companion Animal Medicine, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
  • 2Division of Pathobiology, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
  • 3Synchrotron Light Research Institute, University Avenue, Nakhon Ratchasima 30000, Thailand.
  • 4Centre for Research and Development of Medical Diagnostic Laboratories, Biosensor Research Group for Non-Communicable Disease and Infectious Disease, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand. jurpoo@kku.ac.th
  • 5Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.


Cancer is a major cause of death in dogs worldwide, and the incidence of cancer in dogs is increasing. The attenuated total reflection Fourier transform infrared spectroscopic (ATR-FTIR) technique is a powerful tool for the diagnosis of several diseases. This method enables samples to be examined directly without pre-preparation. In this study, we evaluated the diagnostic value of ATR-FTIR for the detection of cancer in dogs. Cancer-bearing dogs (n = 30) diagnosed by pathologists and clinically healthy dogs (n = 40) were enrolled in this study. Peripheral blood was collected for clinicopathological diagnosis. ATR-FTIR spectra were acquired, and principal component analysis was performed on the full wave number spectra (4,000-650 cm−1). The leave-one-out cross validation technique and partial least squares regression analysis were used to predict normal and cancer spectra. Red blood cell counts, hemoglobin levels and white blood cell counts were significantly lower in cancer-bearing dogs than in clinically healthy dogs (p < 0.01, p < 0.01 and p = 0.03, respectively). ATR-FTIR spectra showed significant differences between the clinically healthy and cancer-bearing groups. This finding demonstrates that ATR-FTIR can be applied as a screening technique to distinguish between cancer-bearing dogs and healthy dogs.


Dogs; cancer; ATR-FTIR; serum

MeSH Terms

Cause of Death
Erythrocyte Count
Fourier Analysis*
Least-Squares Analysis
Leukocyte Count
Mass Screening*
Principal Component Analysis
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