Mosquito bites - Itchy itchy itchy

[Danked]

This just happened to one of the guys that deliver parts to our shop. He was doing some work outside and disturbed a wasp or bee nest. He left it alone till most disappeared and then went back to work. He didn't see what actually bit him, but the doctors are saying it was probably some sort of spider. Thinking he got stung he thought nothing of it till the next day when his hand and fingers started to swell. He went to the hospital where they dismissed it as an allergic reaction. Having never been allergic to bees or wasps before he went to his regular doctor who had an infectious diseases guy on staff. That guy took a quick look at it and immediately drove him to the hospital himself. He had to have some minor surgery done and spent 5 days in the hospital on an IV. They're saying he's lucky he still has movement in his fingers.