EN
The investigation was carried out on 40 dogs of different sex, age and breed. The animals were divided into 3 groups: I (control) – 20 healthy dogs, II - dogs with diarrhoea aged under 1.5 years, III - dogs with Falimentary tract catarrh symptoms aged over 1.5 years. Clinicaf examinations were performed in all the animals. In 5 randomly chosen dogs from each group, D-xylose and glucose loading tests were performed. The results of D-xylose and glucose tests in the dogs of group I were found to be normal. In the dogs of group II, the results of both tests were lower than normal, and in the dogs of group III they were comparable with those found in the control group. The results of the present study suggest that the D-xylose and glucose loading tests are reliable for determining the intestinal absorption efficiency. D-xylose test can be substituted with a glucose loading test which gives comparable results.