That's not what the link says and I've never seen or heard of Rudi's blood being found at the crime scene or his apartment.
In Batch 5 (29 December 2007-early January 2008, not attended by defense observers), the lab isolated two blood-positive samples bearing Guede’s profile. These new samples were from Kercher’s purse and sweatshirt, indicating that Guede had handled, and perhaps bled on these items at the time of the murder.
If the PGP make the same claim about Amanda's blood mixed with Meredith's based on the same findings, it would be rejected here.
I very much doubt he was bleeding or they would have found it at his apartment if no where else. Maybe I forgot about them finding it at his apartment.
The thing is that I paid attention to this because of the healing cuts found in Germany. I believe they were self inflicted to conform with the "blond Italian" attacker and his fight with him.
The source is hardly neutral on the subject yet even there it is only a "perhaps" as for Rudi bleeding. It certainly isn't surprising that there would be blood on those item, but almost for sure Meredith's.