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Agglutination
Use this picture to answer questions 1 and 2.

Results photo

1. What was the endpoint?
a. 1:2
b. 1:4
c. 1:32
d. 1:256
e. 1:512

2. What was the antibody titer?
a. 2
b. 4
c. 32
d. 256
e. 512

3. What was the antiserum used in this experiment?
a. Patient's serum
b. Salmonella
c. Saline
d. Anti-human serum
e. Cow

Use the following antibody titers to answer questions 4 and 5:

Patient
Antibody Titer
Day 1 Day 2 Day 2
A 128 128 128
B 128 256 512
C 0 0 0
D 0 0 0

4. Which patient probably has the disease?
a. A
b. B
c. C
d. D
e. Can't tell

5. Which patient most likely had the disease?
a. A
b. B
c. C
d. D
e. Can't tell

6. Which antibodies are produced first?
a. IgA
b. IgE
c. IgD
d. IgG
e. IgM