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Table 5 The distribution of anti-PvMSP-1 19 and -PfMSP-1 19 IgG antibodies avidity by age group in analysed individuals

From: Survey for asymptomatic malaria cases in low transmission settings of Iran under elimination programme

 

Avidity Index (AI)

 

Antigen

Code

Age

Age group (y)

sex

Survey 1

Survey 2

Survey 3

Bashagard district

PvMSP-1 19

1

12

6-14

M

26.75

29.54

29.43

2

15

15-20

F

21.1

22.37

23.6

3

18

15-20

M

33.57

33.67

49.83

4

21

21-40

F

54.68

42.01

44.46

5

28

21-40

F

20.3

19.57

20.5

PfMSP-1 19

1

35

21-40

F

55.84

57.58

59.77

Ghale-Ganj district

PvMSP-1 19

1

17

15-20

F

35.64

36.27

21.59

2

17

15-20

M

49.81

49

48.81

3

18

15-20

M

24.83

24

23.5

4

60

>40

M

77.14

75

74.7

 

PfMSP-1 19

1

25

21-40years

F

47.3

46.2

46

  1. Low avidity IgG antibodies, Avidity Index (AI) <30%.
  2. Intermediate avidity IgG antibodies, Avidity Index (AI) between 30 - 50%.
  3. High avidity IgG antibodies, Avidity Index (AI) >50%.