Kidd (009) BLOOD GROUP SYSTEM

Question 1

Kidd antigens that are well-developed at birth; not very immunogenic; ENHANCED by ENZYMES

Answer 1

Jka and Jkb Kidd antigens

Question 2

Kidd antigen that is present on any RBC positive for Jka or Jkb

Answer 2

Jk3 Kidd antigen

Question 3

Kidd antibody commonly encountered; IgG, 37C/AHG reactive; shows dosage effect; difficulty to detect because it is weakly reacting and found in combination with other antibodies

Answer 3

Anti-Jka

NOTE:
*Notorius reputation in bloodbank
*Titer quickly declines in vivo
*Causes Delayed HTR (within 24 to 28 days after transfusion)

Question 4

Jk gene is expressed in chromosome ____:

Answer 4

Jk gene - chromosome 18

Question 5

Jk phenotype that makes RBCs resist lysis in 2M urea; common in Polynesians; also identified in Filipinos, Chinese, Japanese, Indonesians

Answer 5

Jk (a-b-) phenotype (null phenotype)