Do some research on vent gleet. If it looks like this, that's what it might be.lol.
Mine seems to have an infection around her vent not internally. Which I am relieved about (?) After cleaning it I remembered that she did have a small sore below her vent when I bathed her pre-show last month. I do not know the cause of that since she has not had mites or lice. Maybe a splinter form the roost?
I have cleaned it and I am treating with L&S Duramycin combo.