Recently had Achilles' tendon allograft placed. Incision site wound with yeast growth. Can the infection from yeast break down the tendon graft?

Fungal infection. Yes a fungus in a wound can mean trouble for the graft. I hope u have a team of doctors looking at you. I would highly recommend an ID doctor be added to your team. You need someone to jump all over that infection and save the hard work that's been done. Did they identify the fungus? Hope things get better soon. .
Possible . Very important to be followed by infectious disease and have thorough and complete resolution .