The ultrastructural changes in peripheral blood leucocytes of fish exposed to the pyrethroid - cypermethrin

H. Lutnicka, A. Ludwikowska

Pyrethroids are the fourth class of insecticides. The insecticides utilize widely in agriculture. The pyrethroids are very toxic to water organisms, including fish. Cypermethrin is one of the synthetic pyrethroids The aim of the study was to get to know the pathological changes in leucocyte system of fish exposed to subtoxic concentration of cypermethrin, observed in electron microscope. The experiments were made on carp weighting 70±10 g, in aquaria conditions. The results showed that cypermethrin influence the internal mitochondrial membrane with her cristae of all kinds of leucocytes (disintegration process). The cytoplasm of the cells showed rarefacation, segregation and impoverishment. The cell nuclei were changed: the differences between euchromatin and heterochromatin were less expressed. Some of them took unusual, atypical shapes.

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