Suppression of radioiodide accumulation by the thyroids and oocytes of Japanese quail with perrhenate.

Japanese quail, 50% inhibition of the 3-h accumulation of 131I occurred with 2.0 micromol KReO4, 2.2 micromol KClO4 and 13 micromol KSCN for the growing oocytes, 1.7, 1.9 and 4.2 micromol for the thyroids of females and 0.20, 0.47 and 5.6 micromol for the thyroids of males. 2. KReO4 inhibition failed after 24 h in males and 36 h in females. 3. Maxima at 6 h in the 131I curves for the plasma, the livers and the testes of KReO4-treated birds were attributed to retention of 131I in the plasma.