Immunohistochemistry section of testes and epididymis tissue from tetrodotoxin treated group (A,B,C) (0.5µg/kg.bw),(D,E,F) (1µg/kg.bw) of male albino rats (A),(B) moderate immune positive cells for IL 1 antibody (arrow)mainly in sertoli cells and spermatogonia.(C) numerous immune positive cells for IL 1 antibody (arrow)in the epididymal epithelial cells lining.(D) numerous immune positive cells for IL 1 antibody (arrow) in spermatocyte. (E) moderate immune positive cells for IL1 antibody (arrow) in epididymal epithelial cells lining.(F) numerous immune positive cells for IL 1 antibody (arrow) in epididymal epithelial cells lining. (DAB- chromogen, X40).