And the Lord said unto Moses, Say unto Aaron, Stretch out thy rod, and smite the dust of the land, that it may become lice throughout all the land of Egypt.
And they did so; for Aaron stretched out his hand with his rod, and smote the dust of the earth, and it became lice in man, and in beast; all the dust of the land became lice throughout all the land of Egypt.
And the magicians did so with their enchantments to bring forth lice, but they could not: so there were lice upon man, and upon beast.
Then the magicians said unto Pharaoh, This is the finger of God: and Pharaoh's heart was hardened, and he hearkened not unto them; as the Lord had said.
Pharoah does not get a warning this time. The magicians attempt to duplicate but can not and they acknowledge God even unto Pharaoh. Yet Pharaoh heart continues to be hardened. Even in corrupt leadership there will be those whose hearts and minds can be changed. Even if their hearts remain unchanged their eyes might become open enough to acknowledge the truth of the sheer vanity of defying the Lord God Almighty. Those who have the ear of leadership, those who advise leadership ought always to tell their leaders the truth. Any leader would be wise to listen to truth carefully even if it is not what they want to hear. Who knows what loss and devistation could be avoided if leaders would only heed the truth? Who knows what blessings could be possible if leaders would only heed the truth? Do not withhold the truth from anyone.
Pray that all leadership will have the wisdom and the discernment to know truth and abide in the truth. That we will always have the faith, courage and boldness to speak the truth. That we too will receive truth even when it may not be what we want to hear. God's Word is truth and it has the power, to convict, deliver, forgive, love, change and save us.
link suggest that quite possibly this plague is not complete since scripture doesn't say that Pharoah requested the plague to be removed nor does it say that God removed that particular plague.