Histopathology of testis of control (A) and imidacloprid (IMI) exposed (B-D) rabbits. A. Normal appearance of seminiferous tubules (S.T.) and regular distribution of spermatogenic cells (S.C., rectangular dotted area), Leydig cells (L.C., arrowheads), and Sertoli cells (black arrows) in the testis of the control rabbits. B-C: The lumen diameter of the S.T. became enlarged (double arrow line) in both IMI-exposed rabbits. D: IMI-exposed, not-washed-feed rabbit shows SC cells were separated from their basement membrane. Hematoxylin and Eosin stain. Scale Bar = 100 µm.