The aim of this study was to investigate the effects of pesticide and
bacteria on hematological parameters of Tra fish. There was 2 experiments: the
first experiment was randomly designed with 2 different concentrations of
cypermethrin (LD
50-96 hours and 1/2 LD
50
-96 hours) and control. The second
experiment were infected with bacteria Edwardsiella ictaluri on Tra fish.
The result showed cypermethrin was highly toxic to Tra fish (LC50-96h is
3,89 mg/L). The erythrocyte quantity and hematocrit value decreased after
administration of cypermethrin. MCV, MCH and MCHC were changed lightly
and non-significant with control. Results from haematological analysis evealed a
significant reduction in total number red blood cell in infected striped catfish
(ranged from 1,4-1,51 milion cells/mm
3
) compared to the healthy one (1,85
milion cells/mm
3
). The number of white blood cell in infectedstriped catfish
ranged from 14,94-16,02 thousand cells/mm
3
which was signficant lower than
the number of white cells in health striped catfish(18,08 thousand cells/mm
3
). Of
these, the number of lymphocyte and thrombocyte decreased but the monocyte
and neutrophil increased. Results from this study provide valuable basic
information for further applied study diagnosis, and effective method for
antibacterial in striped catfish farming.
