No duh! Only, but almost all of, forsaken-type left the Scourge. Ghouls, geists, skeletons and other shits are still in there.
Well, either it is an Easter egg suggesting that Chris Metzen is Hindu(jk, do you get it?) or Blizzard was to lazy to make blighted-cow-corpses, because it is the same New Plague which turned the Forces at the Wrath Gate into piles of goo.
*note*: This has nothing to do with the Argent Crusade anymore, I hope moderators won't see it. xD