I know BPs can fart & it is normal, but I'm a little concerned about the mucus & blood.

Last night, one of the snakes in QT made some really loud & disgusting noises. I don't think I can fully describe it, but loud, sort of fart-like, and also sort of gurgly. And it went on for a surprisingly long time. So, once I identified where the sound was coming from (that it was one of the snakes was far from my first thought), I opened up the tub to find a mess. The snake was just finishing up shedding, having maybe 1cm of the tail tip still on. OK, sheds often mean poop. But there wasn't really poop. There was some urates, and a fair puddle of what I assume was pee, and also some globs of mucus and a few spots of blood. There were also some splash marks on the side of the tub, so I assume this stuff came out of the snake rather explosively. The total amount of mucus was maybe a tablespoon, and the spots of blood were probably no more than half a dozen drops of actual blood, but splattered around a bit and mixed in with the other parts of the mess, so it looked like more. This BP is about 1800g, so it really wasn't much to have come out of a snake that size.

Stupid me, I was more worried about cleaning up the mess and the idea of pics did not occur to me until later, so sorry, I can't share pics to show what it was like.

My main concern is whether or not mucusy and bloody urate/waste stuff may indicate internal parasites, or some other kind of disease, or is it within the realm of normal?

A bit more background: I've had the snake and others from the same source for about a month now, and I haven't seen any similar symptoms from any of the rest, and they've seemed mostly healthy. A few had some bits of stuck sheds & I heard a few whistly breaths because of it during the first several days after when we got them, but that has cleared up (with the exception of one that I'm beginning to suspect is like the occasional post I see snakes such as black pastels or cinnamons who have a bit of a whistle normally) and I never saw other signs of RI. I was also told that they had just been treated for mites, and I did see precisely one mite, but whether it was the treatment they had already been given or the PAM I used on their QT enclosures, I've never seen another mite so I believe that problem is gone.