A unitary system of government, or unitary state, is a sovereign state governed as a single entity. The central government is supreme, and the administrative divisions exercise only powers that the central government has delegated to them.
So, preventing an infestation of ants or getting rid of ants is a matter of closing entry points, repelling them, and practicing daily routines of cleanliness. 1  Follow them. 2  Close gaps and/or apply natural repellents those entry ways.  Practice cleanliness and routine maintenance.
Kill the queen. The best way to get rid of ants is to destroy their source: the ant queen. She produces a large number of ants and killing her will exterminate them; if you can, find and kill the queen inside the ant nest. She's rather shy and will hide in the bottom.