Wart infected mobs

The idea is that if you bring a normal animal/creature to the nether from the overworld it will become infected.

A wart infected animal/creature would attack the player and give a poison effect, If a mob is wart infected it will drop different items but it will always drop nether warts.

Of course a mob wont become infected the second it enters the nether, It would probably take about a minute.

And maybe even the PLAYER could become infected... Maybe by touching nether warts?