Hi Minnie,
Sorry to hear that Karl is in the hospital. I think that infections are quite common and you did the right thing in getting the ambulance out and getting Karl into the ER. Hopefully now Karl will get some anti-biotics or something that will get the infection sorted out. If you use the search function here I am sure that you will find more posts about infections and what was done to deal with them. As to whether the infection will affect Karl from getting surgery, I couldn’t say either way. Hoping that Karl makes a speedy recovery.
My best wishes to you both,
Gavin