Skip to main content

Table 2 Positivity rate and distribution of fluorescent antibody responses of sera according to age

From: Detection of an antibody against Plasmodium vivax in residents of Gimpo-si, South Korea, using an indirect fluorescent antibody test

Age

No. of Sera Tested

No. of Positive Sera

aIFAT serum dilution endpoint

Positivity rate (%)

bAPI

   

< 1:32

≥ 1:32

1:64

1:128

1:256

1:512

1:1024

1:2048

  

0 - 9

299

7

292

3

4

0

0

0

0

0

2.34

0

10 - 19

604

7

597

4

3

0

0

0

0

0

1.16

0.16

20 - 29

389

5

384

2

1

0

1

1

0

0

1.29

0.43

30 - 39

784

11

773

6

4

1

0

0

0

0

1.40

0.33

40 - 49

842

23

819

10

8

3

0

2

0

0

2.73

1.04

50 - 59

912

19

893

8

8

3

0

0

0

0

2.08

1.69

60 - 69

1164

29

1135

18

5

2

1

3

0

0

2.49

1.68

70 - 79

638

19

619

11

4

2

2

0

0

0

2.98

2.39

80 - 89

162

5

157

1

0

2

0

0

1

1

3.09

5.62

90 - 99

3

0

3

0

0

0

0

0

0

0

0

0

Total

5797

125

5672

63

37

13

4

6

1

1

2.16

0.68

  1. Note. aIFAT; Indirect fluorescent antibody test
  2. bAPI; Annual parasite index from 1999
  3. * It shows significant correlation between age group and IFAT positivity rate of IFAT (P = 0.03) (except age group 90-99).
  4. §It shows significant correlation between age group and API (P = 0.003) (except age group 90-99).