ABO blood group (subgroups, discrepancies)

Question 1

A subgroups are described by __ in __

Answer 1

Von Dungern, 1911

Question 2

t/f: a subgroups are more common than b subgroups

Answer 2

t

Question 3

__% of all group A (or AB) individuals are A1

Answer 3

80%

Question 4

A1 or A2: weaker subgroup

Answer 4

A2

Question 5

1-8% of __ individuals produce __ in their serum

Answer 5

a2 individuals, anti-a1 serum

Question 6

22-35% of __ individuals produce __ in their serum

Answer 6

a2b individuals, anti-a1 serum

Question 7

A1 cell / A2 cell: has more antigenic sites for the H antigen

Answer 7

A2 cell

Question 8

naturally occurring IgM cold-reacting antibody

Answer 8

a1 antibody

Question 9

unlikely to cause transfusion reaction

Answer 9

a1 antibody

Question 10

clinically significant if reactive at 37C

Answer 10

a1 antibody

Question 11

t/f: h antigen may not be detectable in group a1 individuals

Answer 11

t

Question 12

in the presence of __, almost all of the __ is converted to a1 antigen

Answer 12

a1 gene, h antigen

Question 13

in the presence of __, only some of the __ is converted to a antigens

Answer 13

a2 gene, a antigen

Question 14

seed extracts that agglutinate human cells with some degree of specificity

Answer 14

lectins

Question 15

source of anti-H

Answer 15

ulex europaeus

Question 16

source of anti-a

Answer 16

helix pomatia

Question 17

source of anti-a1

Answer 17

dolichos biflorus

Question 18

source of anti-b

Answer 18

bandeiraea simplicifolia

Question 19

source of anti-m

Answer 19

iberis amara

Question 20

source of anti-n

Answer 20

molucella laevis, bauhinia purpura

Question 21

source of anti-t

Answer 21

arachis hypogaea

Question 22

source of anti-tn

Answer 22

salvia sclaera

Question 23

__ subgroups are infrequent

Answer 23

b subgroups

Question 24

bombay phenotype was reported by __ in __(year)

Answer 24

bhende, 1952

Question 25

t/f: fut 1 - se gene, fut 2 - h gene

Answer 25

f (baliktad)

Question 26

rbcs either completely lack h antigens or have small amounts of h antigen present

Answer 26

parabombay phenotype

Question 27

occur when unexpected reactions are obtained in the forward and/or reverse grouping

Answer 27

ABO discrepancies

Question 28

abo discrepancies can be due to problems with patient's __, __ or both

Answer 28

serum, rbcs

Question 29

t/f: if discrepancies can't be resolved, group o rh (-) may be administered

Answer 29

t

Question 30

most common group of discrepancy

Answer 30

group 1

Question 31

discrepancy commonly seen in newborns, elders, patients with AIDS . leukemia / lymphoma

Answer 31

group 1

Question 32

least frequently encountered discrepancy

Answer 32

group 2

Question 33

discrepancy between forward and reverse groupings resulting in rouleaux formation / pseudoagglutination

Answer 33

group 3

Question 34

discrepancies that may be due to miscellaneous problems

Answer 34

group 4