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Table 2 Results of each series of measurement of low parasitaemia slides prepared according to Lambaréné or WHO method before transformation (in parasites/μL) and after square root transformation

From: Limit of blank and limit of detection of Plasmodium falciparum thick blood smear microscopy in a routine setting in Central Africa

Method: Lambaréné

Slide ID

LOD-L-21

LOD-L-16

LOD-L-20

LOD-L-17

LOD-L-18

LOD-L-12

Non transformed

      

Mean

105

77

63

45

26

8

Median

90

63

52

35

22

0

σ

60

59

27

34

20

11

Transformed

      

Mean

9.9

8.1

7.8

6.2

4.5

1.9

Median

9.5

7.9

7.2

5.9

4.7

0

σ

2.75

3.52

1.57

2.59

2.45

2.19

Method: WHO

Slide ID

 

LOD-W-21

LOD-W-18

LOD-W-19

LOD-W-20

LOD-W-17-4

LOD-W-17-1

Non transformed

      

Mean

116

45

102

65

35

27

Median

112

47

84

66

31

15

σ

35

41

56

40

36

43

Transformed

      

Mean

10.6

5.3

9.7

7.5

4.5

3.5

Median

10.6

6.8

9.2

8.1

5.5

3.8

σ

1.73

4.11

2.87

2.94

3.87

3.83

  1. Each slide was read 5 times by 6 different microscopists.
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Malaria Journal

ISSN: 1475-2875

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