Not always is the answer, unfortunately many of the products sold for household use by untrained professionals may not get rid of all the fleas in your home. If some fleas are left they will reproduce and you will end up with a flea infestation again.
Dunbeath
Dunbeath is a town in south-east Caithness, Scotland on the A9 road. It was the birthplace of Neil M. Gunn (1891-1973), author of The Silver Darlings, Highland River and so on, most of whose novels are set in Dunbeath as well as its Strath. Dunbeath has a very rich historical landscape, the website of various Iron Age brochs and an early middle ages reclusive site (see Alex Morrison's historical study, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn composed: "These little straths, like the Strath of Dunbeath, have this intimate elegance. In boyhood we get to know every square backyard of it. We incorporate it physically as well as our memories hold it. Birches, hazel trees for nutting, swimming pools with trout and a sometimes visible salmon, river-flats with the wind on the bracken and also going away bunny scuts, a riches of wild blossom as well as little bird life, the skyrocketing hawk, the unforeseen roe, the old graveyard, ideas of the people that as soon as lived much inland in straths and also hollows, the past and also the here and now held in a moment of day-dream." ('My Little Britain', 1941.). There is a neighborhood museum/landscape interpretation centre at the old town institution.