Zmiany liczebnosci populacji limfocytow T u owiec i jagniat nie immunizowanych oraz immunizowanych przeciw inwazji przywry Parafasciolopsis fasciolaemorpha

The experiment was carried out on sheep and lambs inoculated orally with 10 000 mc P. fasciolaemorpha. Some of the animals were given intramuscular injections of the somatic antigen from adult flukes together with complete Freund’s adjuwant against parasitic infection. Changes in the percentage of T lymphocytes were examined. A slight increase in the number of T lymphocytes was observed in infected animals but stronger reaction was found in lambs. In adult sheep the average intensity of infection was 27.89% compared with only 9.41% in lambs. Statistically significant high levels of lymphocytes also occurred in infected animals after intramuscular immunization up to the and of the prepatent phase of infection. This increase took place more rapidly and was higher in comparison with nonimmunized hosts. In immunized animals the average intensity was lower: 7.33% in sheep and 3.85% in lambs.