Dracula 3: The Path of the Dragon Hints

How can I interpret the results of a blood test?

  • 1 of 16: After mixing blood with both types of reagent, check to see which reagents have changed color or gained red spots.
  • 2 of 16: Of course, you'll have to know what each change means to determine the actual blood type.
  • 3 of 16: Have you looked through the green blood test results folder that's to the left of the refrigerated cabinet?
  • 4 of 16: You'll notice that each report has the four blood types A, B, AB, and O listed next to check boxes.
  • 5 of 16: The first four reports don't have any blood types checked, since that's your task, so read on to some of the earlier reports.
  • 6 of 16: You'll see that sample number 810 tested as type O, number 809 tested as type A, and so on.
  • 7 of 16: So why not run some blood type tests on ones that have already been done?
  • 8 of 16: NOTE: There's only one spare test tube to use, so wash it out (by picking it up and using it on the sink) when you want to change its contents.
  • 9 of 16: Testing blood sample 810 will yield the result that the blue reagent turns purple and the yellow reagent turns orange. So that's what indicates type O blood.
  • 10 of 16: Testing blood sample 809, which you know to be type A, you'll see that the blue reagent gains red spots and the yellow reagent turns orange.
  • 11 of 16: Unfortunately, that's all you'll get, since all of the finished tests came up with type A or type O blood.
  • 12 of 16: However, you can use those results to figure out what the type B and type AB results are.
  • 13 of 16: The key to it is the red spots, not the color change. The color change is just due to the fact that you're mixing a red liquid (blood) with blue and yellow liquids, and basic color math says that red + blue = purple and red + yellow = orange.
  • 14 of 16: That means there are four possible results, since red spots could appear in both reagents, neither reagent, or just one of the reagents.
  • 15 of 16: Since O is the no-red-spots type, and A is the blue-with-red-spots type, we can deduce that B is the yellow-with-red-spots type, and AB is the red-spots-in-both type.
  • 16 of 16: So here's the blood test summary:

    Type A: blue-->blue with spots, yellow-->orange
    Type B: blue-->purple, yellow-->yellow with spots
    Type AB: blue-->blue with spots, yellow-->yellow with spots
    Type O: blue-->purple, yellow-->orange