So - how many 'Fungus take over people' stories can people come up with? Pods, or other things that replace the physical body, a la Invasion of the Body Snatchers, don't count. Mind control mushrooms, a 50's staple for awhile.
Here is a reference with a twist. I'm not 100% sure where it's from. I think it might be a Simak or Bradbury radio play, possibly X Minus One. It's a common enough story (anybody remember the fun one in Isaac's Magazine about the metal cubes from Titan that evolve and are mail-order toys for kids with a chilling "Questions to ask" list at the end?).