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1 Polish Journal of Veterinary Sciences

1 2000

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Studies on selected protective functions of thrombocytes and neutrophilic granulocytes in healthy and sick carp

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Stosik M. , Deptula W.

Polish Journal of Veterinary Sciences

2000

tom 03

nr 4

Studies were performed on the capacity of thrombocytes and of neutrophilic granulocytes in carp to ingest the standard bacterial strain of Staphylococcus aureus 209P Oxford. The bactericidal capacity of the cells at various developmental stages of the carp and in relation to their health status was also studied. The studies were performed on healthy carp, 3 months to 5 years of age, and sick carp, 3, 12, 23 or 29 months of age, suffering from Branchiotnycosis, Branchionecrosis and suppurative dermatitis (Motile Aeromonas Infection). Apart from their capacity to ingest Staphylococcus aureus 209P strain, fish thrombocytes demonstrated bactericidal activity toward the microbes. In healthy carp, the phagocytic activity of thrombocytes as well as of neutrophilic granulocytes directly corresponded to the stage of individual development of the fish. Bactericidal activity of thrombocytes and of neutrophilic granulocytes toward the applied strain of Staphylococcus aureus 209P strain persisted at a similar level regardless of the age of the fish. The differences observed in the activity of phagocytic cells in the sick carp were related, first of all, to the form of the disease (chronic or acute) and, to a lesser extent, to the age of the carp and the type of aetiological factor.