They've been trying to work/get the 'bugs' out of the system. [=trying to fix the system's problems]
He was first bitten by 'the' acting 'bug' [=he first became interested in acting] when he was 18.
Her legs were covered in 'bug' bites. [=itchy or painful wounds from insects]
(..) Let's do another. She's got something in her throat. When a body comes out of the water, lots of times there's leaves in the mouth. What is that? Some kind of seed pod? No, sir. That's a bug cocoon. There's no way that could get way down in there. Not unless somebody shoved it in there. (..)1991 The Silence of the Lambs