(The). An enthusiastic love of prairie life, which seems to be part of our being, to strengthen our strength, invigorate our spirit, and endow us with new life.
“What with gallops by day and the wild tales by the night
watch-fires, I became intoxicated with the romance of my new life; I
had caught the prairie fever.” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Prairie Fever from Infoplease: