Definitions:
a harmful microorganism, typically a bacterium

a small insect

an insect of a large order distinguished by having mouthparts that are modified for piercing and sucking.

a concealed miniature microphone, used for secret eavesdropping or recording

an error in a computer program or system

conceal a miniature microphone in (a room or device) in order to listen to or record someone's conversations secretly

annoy or bother (someone)