We've learned about microscopic findings of worms & eggs within the intestines and urine, but this is also true for mite infections. The egg micrograph in the medical publication in the link below looks very similar to what Smuse has shared with us before along with her mite. 70428 has also had pathogens show up in her urine too, as well as others.
"Acaroid mite can survive in many environments including the storehouse, human and animal bodies. Its infestion in human can cause acariasis in several organs including the lung, intestine and urinary tract."