An infant is born to two parents. The father has type A blood and the mother has type B blood. A sample of the infant’s blood is sent for blood typing. When the infant’s blood is subjected to forward typing, there is no agglutination. When back-typing is performed, the infant’s serum causes agglutination with both type A and type B RBCs. Which of the following is the most likely interpretation of these results?
A. The infant has type A blood.
B. The infant has type AB blood.
C. The infant has type B blood.
D. The infant has type O blood.
E. There has been a laboratory error, and this is not the infant’s blood.
Answer
Choice "D" is the best answer. This infant has type O blood. Because the infant’s red blood cells do not have either the
A. The infant has type A blood.
B. The infant has type AB blood.
C. The infant has type B blood.
D. The infant has type O blood.
E. There has been a laboratory error, and this is not the infant’s blood.
Answer
Choice "D" is the best answer. This infant has type O blood. Because the infant’s red blood cells do not have either the