A measly hog infects the whole sty.
More Spanish Proverbs:
The wolf and the fox are both in one story.Spanish
Sell publicly and buy privately.
Spanish
God cures, and the doctor takes the fee.
Spanish
He has much to do who would please everybody.
Spanish
The king goes as far as he can, not so far as he would.
Spanish
Though you are a prudent old man, do not despise counsel.
Spanish