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Title: Immunotoxicity and hepatic function evaluation in Nile tilapia (Oreochromis niloticus) exposed to diazinon
Author: Giron-Perez, M.I.
Santerre, A.
Gonzalez-Jaime, F.
Casas-Solis, J.
Hernandez-Coronado, M.
Peregrina-Sandoval, J.
Takemura, A.
Zaitseva, G.
Issue Date: 2007
Abstract: The LC50 of the organophosphorus pesticides (OPs) diazinon to Nile tilapia (Oreochromis niloticus) was determined, thereafter, hepatic activity, phagocytic index, percentages of active cells, relative spleen weight, total IgM concentration and lymphoproliferation rates were compared between diazinon exposed groups (LC50 and 1/2LC50) and non-exposed control group. Experimental data show that diazinon is highly toxic for juvenile Nile tilapia (LC50 = 7.830 ppm) and presents immunotoxic properties which affect both the innate and cellular adaptive immune responses of this fish, as revealed by the fact that splenocyte proliferation and phagocytic indices were significantly decreased after acute exposure to the pesticide. However, the hepatic biochemical parameters and the total circulating IgM concentrations were not affected in this experimental model. © 2007 Elsevier Ltd. All rights reserved.
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