Blood Typing
IntroductionBlood grouping, also known as blood typing, is the laboratory process of determining an individual's blood type based on specific antigens present on the surface of red blood cells (RBCs) and the antibodies found in their plasma.
What our notes say
- IntroductionBlood grouping, also known as blood typing, is the laboratory process of determining an individual's blood type based on specific antigens present on the surface of red blood cells (RBCs) and the antibodies found in their plasma. (Blood Grouping and Blood Typing)
- Blood typing based on antigens (A, B, Rh/D) present on RBC surface (Blood Transfusion Guide: ABO, Reactions, Products & Safety)
- Accurate blood typing allows healthcare providers to monitor and manage these risks effectively. (Blood Grouping and Blood Typing)
Study material on Blood Typing
Practice questions on Blood Typing
A 23-year-old woman with recurrent UTIs, at least one episode of pyelonephritis. Blood typing shows the P blood group antigen. Likely primary cause of her infections
- Escherichia coli producing heat-stable toxin
- Escherichia coli with K1 (capsular type 1) antigen
- Escherichia coli O139 (LPS O antigen 139)
- Escherichia coli with P-pili (fimbriae)
- Escherichia coli O157:H7 (LPS O antigen 157; flagellar antigen H7) Answer:
Answer: A. P-pili (fimbriae) bind to a receptor related to the P blood group antigen on uroepithelial cells, mediating attachment and ascending infection to the kidneys (pyelonephritis). --- ---
A 23-year-old woman has a history of recurrent urinary tract infections, including at least one episode of pyelonephritis. Blood typing shows the P blood group antigen. Which of the following is likely to be the primary cause of her infections?
- Escherichia coli that produce heat-stable toxin
- Escherichia coli with K1 (capsular type 1) antigen
- Escherichia coli O139
- Escherichia coli with P-pili (fimbria
- Escherichia coli 0157:H7
Answer: D. P pili (P fimbriae) on uropathogenic E. coli specifically bind to P blood group antigens on uroepithelial cells. Patients with P antigens are more susceptible to pyelonephritis. P-piliated E. coli strains cause 90% of pyelonephritis cases in otherwise healthy individuals. ---