For a work permit, visa for 3 months or residency you will be tested on Aids.
If you want to marry here with a jordanian they will also test if your blood are can be matched, it meens that you will have "healhty children" instead of children with a disabilty like down Syndrome, for example.
If you score is lower then a certain percentage you are not allowed to marry in Jordan.
That's all you have to know.
If you want that they test on some other things, you can ask for it but I think you have to pay extra for this and fill another tube of blood.