Taxi----- I had a few minutes and started thinking about your request (as per your original post). I'm a research nerd at heart and love nothing more than a science puzzle.
So----- just noodling around on the Internet gave me some questions. No answers just maybe some clarification.
First of all the word parboil isn't the word you want. It's more likely "blanching".
The temp. of boiling water (212 F) will kill most human pathogens. But you're asking about animal pathogens. They may be close enough for your questions though. Then the time for blanching/parboiling is another problem.
My few minutes is over now.
But maybe someone else will read this and run with it. I may do more tomorrow.
(Just to be clear----- I personally wouldn't worry about it. But you are and it makes an interesting topic, scientifically.)