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Effect of oral administration of Nisin (50 mg/kg/day) for 90 days on structural organization of testis (a, b) and epididymis (c, d) in control (a, c) and treated (b, d) rats. No treatment related abnormalities were observed. S: Epididymal sperm, L: Testicular lumen, and ET: Epididymal tubule.
