[Lysozyme activity in cat feces]

Activity of fecal lysozyme was determined in healthy cats and cats with chronic diarrhea. The established reference value ranged from 0 up to 2.6 micrograms/g feces. Mean activity of the control group was 1.3 +/- 0.9 micrograms/g feces, mean activity of the patient group was 3.4 +/- 3.3 micrograms/g. There was a statistically significant difference between these two values. Nevertheless it was not possible to classify various diseases by evaluating lysozyme activity. In addition to endoscopy and histological examination, determination of lysozyme can be used as screening test and means of assessment for treatment and progress in cats with chronic diarrhea.