The epididymis showing sperm cells, sterocilia, basal cells, expanded stroma with proliferated blood vessels (thin arrows) Control (1.6 ml distilled water) (left) and increased stroma and intra-epithelial lymphocytes (large arrows, more pronounced) in the treated rat (RIPE; 92.5 mg/m2 per body surface area) (right). [H&E, x400]. RIPE: Combined fixed-dose Rifampicin, Isoniazid, Pyrazinamide, Ethambutol.