17 weeks.
Wilson: House, there is no mosquito. This is all about Cuddy.
House: Ah, she's bugging me! Poetic!
Wilson: Have you seen this bug?
House: Have you seen this bite?
Wilson: No. What I’ve seen is a suppurating wound that you’ve scratched and mutilated into a gangrenous state. Delusional parasitosis.
(5x07 The Itch)