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The aim of present work was to study the toxicity of (mancozeb )Dithane fungicide on fish Claras lazera (catfish) and consequently to human beings.The fishes were exposed to Dithane in dose of 0.5 ppm /L (equivalent of 1/10 of LD50)for 30 days. Different Haematological, Biochemical, Bacteriological, and Immunological parameters were assessed. The results showed significant increase in Blood level of Sodium (Na), Potassium (K), Cortisol, Urea, Creatinine, Glucose, Insulin as well as Aspartate Amino Transferase (AST) and Alanine Amino Transferease (ALT)in blood. However there was a decrease in blood level of Iron and IgM, accompanied by decrease in Haemoglobin (HB), Macrocytic hypochromic anemia (R.B.Cs) count, Packed cell volume (PCV) which was observed in fish in 7, 15, 30, days after exposure to Dithane. The Haemogram shows reticulocytosis and increase in mean corpuscular volume (MCV). Dithane produces metabolic stress and cell damage with malfunction of haemopoetic system. Microbiological examination revealed a presence of pathogenic bacteria mainly E. coli, Flavabacterium, and Staphylococcus aureus. It was concluded that in catfish reared on low dietary carbohydrate (CHO) diet there was hyperglycemia due to increase in cortisol hormone. However immunological results revealed decrease in the level of IgM in blood; a loss of scales and petichial haemorrhage in parts of skin was observed. Ascitic and erosion due to complication of bacterial infection, was also accorded.

arab universities journal of agricultural sciences

ASSESSMENT OF THE HAZARDOUS EFFECT OF FUNGICIDE DITHANE ON CLARIAS lazera (CATFISH) INCLUDING HAEMATOLOGICAL, BIOCHEMICAL, AND IMMUNOLOGICAL PARAMETERS