Polio was nearly eradicated when society decided to mass produce and use a vaccine created by Jonas Salk. Polio was a big issue but they managed to cure it with a vaccine. Comments.
In this method, ferri-. cyanide and potassium cyanide convert hemoglobin to a more stable. cyanmethemoglobin form that is measured photometrically. While this. method is straightforward and uses a single reaction solution, not all. forms of hemoglobin are converted to cyanmethemoglobin at the same.
Because occult blood is not visibleâ¦.a stool blood test is required to detect it. There are essentially 3 types of fecal occult blood tests, and it is important to understand how they differ. Guaiac tests (like Hemoccult) develop a blue color in the presence of heme or other peroxidase-like or oxidizing compounds.