Analysis of information sources in references of the Wikipedia article "Terumah (offering)" in English language version.
A priest (Cohen) who is ritually unclean is prohibited from eating the 'terumah'... A defiled person who touches the hallowed thing has committed an offense, since it is forbidden for him to defile the hallowed things or to bring upon them impurity, seeing that that would invalidate them... and even the 'terumah' it is forbidden to defile.