EN
The vitamin C content is assessed by colorimetric and titration methods. The results obtained are compared with those of Holz (1961) who - in authors' opinion - failed to determine properly the vitamin, C level in the body of the examined parasites. Moreover, the vitamin C content in the tissues of parasites was found to be independent from the site of its localization in the host organism. The authors believe that the disturbances in the vitamin C balance are due more to defense and adaptation mechanisms of the host than to the more effect of parasitic exploitation.