Investigations

Question 1

What is an abnormal lymphocyte count in an infant?

Answer 1

lymphocyte count <2.5 is considered abnormal in infants

Question 2

What is the lymphocyte subset marker for T cells?

Answer 2

CD3

Question 3

What is the lymphocyte subset marker for helper T cells?

Answer 3

CD4

Question 4

What is the lymphocyte subset marker for cytotoxic T cells?

Answer 4

CD8

Question 5

What are the lymphocyte subset markers for NK cells

Answer 5

CD16/CD56

Question 6

What are the lymphocyte subset markers for B cells?

Answer 6

CD19/CD20

Question 7

What is the usual T cell: B cell ratio?

Answer 7

2:1

Question 8

What does CH50 measure?

Answer 8

Classical complement pathway function

Question 9

What does AH50 measure?

Answer 9

alternative complement pathway function

Question 10

What does a tetnus vaccine antibody measure?

Answer 10

T cell function

Question 11

Is a pneumococcal vaccine antibody T cell dependent or independent?

Answer 11

T cell independent

Question 12

What does NBT stand for and what does it measure?

Answer 12

NBT: nitroblue tetrazolium

Measures neutrophil function