AAB MT Immunohematology EXAM STUDY GUIDE
2026/2027 ACCURATE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED PASS
<NEWEST VERSION>
1. Allogenic - ANSWER ✔ denoting, relating to, or involving tissues or cells
that are genetically dissimilar and hence immunologically incompatible,
although from individuals of the same species.
2. Autologous - ANSWER ✔ (of cells or tissues) obtained from the same
individual
3. How long will a traveler to endemic malarial areas be deferred before blood
donation? - ANSWER ✔ 12 months provided they are asymptomatic and
have taken antimalarial drugs
4. How long must an individual with a rabies vaccination wait before donating
blood? - ANSWER ✔ One year if given after bite by a rabid animal
5. True or false, blood from a donor who has ingested aspirin within 36 hrs of
donation should not be used for platelet concentration? - ANSWER ✔ True
6. A positive HBsAg, HBeAg, AntiHBc and negative Anti HBe and Anti HBs -
ANSWER ✔ Acute phase hepatitis, very infectious or chronic carrier
,7. A negative HBsAg, HBeAg, positive AntiHBc, Anti HBe and Anti HBs -
ANSWER ✔ Patient is in recovery state of disease, no longer considered
infectious
8. What is the name given to the infectious HepB virus? - ANSWER ✔ Dane
particle
9. What is the first serological marker to appear following HBV infection? -
ANSWER ✔ HBsAg
10.Which HepB antigen is a marker of active viral replication? - ANSWER ✔
HBeAg (core)
11.HBD DNA is a more accurate indicator than HBeAg for active viral
replication? - ANSWER ✔ True
12.Which hepatitis is the leading cause of hepatitis in young people in
developing countries? - ANSWER ✔ HepE
13.Chagas disease - ANSWER ✔ Illness spread by insects
14.All of the following donors would be permanently deferred EXCEPT which
one? - ANSWER ✔ 38-year-old male who received rabies vaccine after a
dog bite 3 months ago
15.All of the following donors would be permanently deferred: - ANSWER ✔
75-year-old male who had acute hepatitis 20 years ago following surgery,
19-y/o first-time donor who received human growth hormone 12 years ago,
, and a 24-y/o donor with a history of a positive test for Hepatitis C from
another blood center.
16.What is the interval between blood donations? - ANSWER ✔ 8 weeks
17.The oral temperature of a donor must not exceed which value? - ANSWER
✔ 37.5 degrees C
18.What is the minimum acceptable hemoglobin for blood donors? - ANSWER
✔ 12.5 g/dL for allogeneic donors
19.What is the lowest acceptable hematocrit for allogeneic donors? - ANSWER
✔ 38%
20.Which blood group system antigens are destroyed by enzymes? - ANSWER
✔ Lutheran
21.All of the following are characteristics of anti-Lu^a EXCEPT which one? -
ANSWER ✔ It causes hemolytic disease of the newborn (HDN)
22.All of the following are characteristics of anti-Lu^a: - ANSWER ✔ It reacts
optimally at room temperature, it causes mixed field reactions, and it reacts
well in saline
23.Other than the D antigen, what other blood group antigen is a potent
antigen? - ANSWER ✔ E
, 24.What percentage of the population lacks the Kell antigen? - ANSWER ✔
91%
25.One of ten units crossmatched is incompatible in the antiglobulin phase of
testing. Which antibody is most likely to cause this result? - ANSWER ✔
anti-K
26.Anti-k is produced in response to which antigen? - ANSWER ✔ Cellano
27.Which antigen is destroyed by enzymes? - ANSWER ✔ Fy^a
28.Enzymes prevent detection of antibodies of which blood group system? -
ANSWER ✔ Duffy
29.In the Duffy blood group system, what is the most common antibody
detected? - ANSWER ✔ Anti-Fy^a
30.Approximately what percentage of blacks have the Fy (a-b-) phenotype? -
ANSWER ✔ 68%
31.Which Duffy phenotype demonstrates resistance to Plasmodium vivax? -
ANSWER ✔ Fy(a-b-)
32.All of the following antigens define the Kidd blood group system EXCEPT
which one? - ANSWER ✔ In(Jk)
2026/2027 ACCURATE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED PASS
<NEWEST VERSION>
1. Allogenic - ANSWER ✔ denoting, relating to, or involving tissues or cells
that are genetically dissimilar and hence immunologically incompatible,
although from individuals of the same species.
2. Autologous - ANSWER ✔ (of cells or tissues) obtained from the same
individual
3. How long will a traveler to endemic malarial areas be deferred before blood
donation? - ANSWER ✔ 12 months provided they are asymptomatic and
have taken antimalarial drugs
4. How long must an individual with a rabies vaccination wait before donating
blood? - ANSWER ✔ One year if given after bite by a rabid animal
5. True or false, blood from a donor who has ingested aspirin within 36 hrs of
donation should not be used for platelet concentration? - ANSWER ✔ True
6. A positive HBsAg, HBeAg, AntiHBc and negative Anti HBe and Anti HBs -
ANSWER ✔ Acute phase hepatitis, very infectious or chronic carrier
,7. A negative HBsAg, HBeAg, positive AntiHBc, Anti HBe and Anti HBs -
ANSWER ✔ Patient is in recovery state of disease, no longer considered
infectious
8. What is the name given to the infectious HepB virus? - ANSWER ✔ Dane
particle
9. What is the first serological marker to appear following HBV infection? -
ANSWER ✔ HBsAg
10.Which HepB antigen is a marker of active viral replication? - ANSWER ✔
HBeAg (core)
11.HBD DNA is a more accurate indicator than HBeAg for active viral
replication? - ANSWER ✔ True
12.Which hepatitis is the leading cause of hepatitis in young people in
developing countries? - ANSWER ✔ HepE
13.Chagas disease - ANSWER ✔ Illness spread by insects
14.All of the following donors would be permanently deferred EXCEPT which
one? - ANSWER ✔ 38-year-old male who received rabies vaccine after a
dog bite 3 months ago
15.All of the following donors would be permanently deferred: - ANSWER ✔
75-year-old male who had acute hepatitis 20 years ago following surgery,
19-y/o first-time donor who received human growth hormone 12 years ago,
, and a 24-y/o donor with a history of a positive test for Hepatitis C from
another blood center.
16.What is the interval between blood donations? - ANSWER ✔ 8 weeks
17.The oral temperature of a donor must not exceed which value? - ANSWER
✔ 37.5 degrees C
18.What is the minimum acceptable hemoglobin for blood donors? - ANSWER
✔ 12.5 g/dL for allogeneic donors
19.What is the lowest acceptable hematocrit for allogeneic donors? - ANSWER
✔ 38%
20.Which blood group system antigens are destroyed by enzymes? - ANSWER
✔ Lutheran
21.All of the following are characteristics of anti-Lu^a EXCEPT which one? -
ANSWER ✔ It causes hemolytic disease of the newborn (HDN)
22.All of the following are characteristics of anti-Lu^a: - ANSWER ✔ It reacts
optimally at room temperature, it causes mixed field reactions, and it reacts
well in saline
23.Other than the D antigen, what other blood group antigen is a potent
antigen? - ANSWER ✔ E
, 24.What percentage of the population lacks the Kell antigen? - ANSWER ✔
91%
25.One of ten units crossmatched is incompatible in the antiglobulin phase of
testing. Which antibody is most likely to cause this result? - ANSWER ✔
anti-K
26.Anti-k is produced in response to which antigen? - ANSWER ✔ Cellano
27.Which antigen is destroyed by enzymes? - ANSWER ✔ Fy^a
28.Enzymes prevent detection of antibodies of which blood group system? -
ANSWER ✔ Duffy
29.In the Duffy blood group system, what is the most common antibody
detected? - ANSWER ✔ Anti-Fy^a
30.Approximately what percentage of blacks have the Fy (a-b-) phenotype? -
ANSWER ✔ 68%
31.Which Duffy phenotype demonstrates resistance to Plasmodium vivax? -
ANSWER ✔ Fy(a-b-)
32.All of the following antigens define the Kidd blood group system EXCEPT
which one? - ANSWER ✔ In(Jk)
