οὐκ ἔστι γῆρας τοῦδε τοῦ μιάσματος → that pollution never wears out, that pollution can never grow old
dŏmĭtūra: ae, f. domo,I a taming, breaking (very rare): boum, Col. 6, 2, 1; Plin. 8, 45, 70, § 179.