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Table 5 Features of non-anaemic patients at presentation who subsequently developed late fall in haematocrit below 30% 3 ā€“ 6Ā weeks latera

From: Therapeutic efficacy and effects of artemisinin-based combination treatments on uncomplicated Plasmodium falciparumĀ malaria -associated anaemia in Nigerian children during seven years of adoption as first-line treatments

Patient (gender, age)

Year of enrolment

Parasitaemia (Ī¼Lāˆ’1)

Enrolment HCT (%)

Antimalarial treatment

PCT (day)

Nadir HCT2 (%) [day]

HCT on day 42 (%)

AnRT1 (day)

AnRT2 (day)

AUC2

FIH/1 000 parasites cpb

Total of mg/kg dose of AA

Total of mg/kg dose of AL

Artesunate

Amodiaquine

Artemether

Lumefantrine

13 (F, 4.9y)

2010

357 397

40

AA

2

27[21]

30

Ā 

14

24.68

0.0113

11.54

31.15

NA

NA

39 (M, 9y)

2012

2 880

37

AL

1

24[21]

32

Ā 

7

6.57

0.3472

NA

NA

12.63

75.79

62 (M, 12y)

2010

50 704

35

AA

2

27[42]

27

Ā 

NA

NA

0.0592

8.57

23.14

NA

NA

153 (F, 8y)

2009

101 734

35

AA

1

28[28]

32

Ā 

7

2.64

0.0295

15

40.5

NA

NA

71 (M, 6y)

2009

178 937

35

AL

1

28[21]

34

Ā 

7

2.64

0.0112

NA

NA

16.1

96.0

129 (M, 9y)

2008

99 077

33

AA

1

29[21]

45

Ā 

7

1.52

0.0202

13.04

35.22

NA

NA

61 (M, 8.1y)

2014

77 727

33

AA

1

20[28]

37

Ā 

7

10.13

0.0386

15.79

42.63

NA

NA

40 (F, 5.3y)

2011

281 538

32

AA

2

29(35)

34

Ā 

7

1.52

0.0074

10.00

27.0

NA

NA

Mean

Age (7.8y)

Ā 

82 078b

35

Ā 

1.38

27.6

33.88

Ā 

8

7.1

0.066

12.32

33.27

14.36

85.9

  1. AA artesunate-amodiaquine, AL artemether-lumefantrine, HCT Haematocrit, PCT Parasite clearance time, AnRT anaemia recovery time, AUC area under curve of deficit in haematocrit from 30% versus time, FIH fall in haematocrit, cpb cleared from peripheral blood, NA Not Applicable, AUC 2 AUC of late fall in haematocrit; a: many of these children were relatively asymptomatic when late-appearing anaemia occurred; b: Geometric mean parasite density
  2. No patient Reported symptoms during late-appearing anaemia