Phagocytic and bacterial activity of blood thrombocytes in carps (Cyprinus carpio)
2002
Stosik, M. | Baldy-Chudzik, K. (University of Zielona Gora (Poland)) | Deptula, W. | Travnicek, M.
The evolution of phagocytic and bactericidal activity of thrombocytes in carps during their ontogenetic development was monitored. We used the techniques described by Mantur et al., adapted to fish. Results were expressed in thrombocyte phagocytic index (Ipt), percentage of phagocyting thrombocytes (%tp), percentage of ingested bacteria (%bp) and in the index of intracellular killing by thrombocytes (Ibt). Number of thrombocytes was also examined using the technique of Dessi. Results of testing thrombocyte capacity to ingest the standard Staphylococcus aureus 209P strain showed that Ipt and %tp increased gradually in carps from 3- to 17-month-old. In animals from 19- to 29-month-old, as well as in spawners the growth in activity paralelled the ontogenetic development within Ipt values while %tp values remained at a similar level. Phagocytic activity of thrombocytes expressed in Ipt was reflected also by %bp values, which was particularly evident in fish between 3-month and 5-year-old. In the case of Ibt, values of the index were not related in any way to stage of ontogeny or sex of the fish. Number of thrombocytes in carps from 3-month to 5-year-old was increasing in parallel to their ontogenetic development.
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