Scolaris Content Display Scolaris Content Display

Pruebas diagnósticas rápidas para diagnosticar el paludismo no complicado no falciparum o por Plasmodium vivax en países endémicos

Appendices

Appendix 1. Search strategy

Search set

MEDLINE

EMBASE

1

Exp Malaria[MeSH]

Exp Malaria [Emtree]

2

Exp Plasmodium [MeSH]

Exp Plasmodium [Emtree]

3

Malaria ti, ab

Malaria ti, ab

4

1 or 2 or 3

1 or 2 or 3

5

Exp Reagent kits, diagnostics [MeSH]

Exp Diagnostic procedures [Emtree]

6

rapid diagnos* test* ti, ab

rapid diagnos$ test$ ti, ab

7

RDT ti, ab

RDT ti, ab

8

Dipstick* ti, ab

Dipstick$ ti, ab

9

Rapid diagnos* device* ti, ab

Rapid diagnos$ device$ ti, ab

10

MRDD ti, ab

MRDD ti, ab

11

OptiMal ti, ab

OptiMal ti, ab

12

Binax NOW ti, ab

Binax NOW ti, ab

13

ParaSight ti, ab

ParaSight ti, ab

14

Immunochromatograph* ti, ab

Immunochromatography [Emtree]

15

Antigen detection method*

Antigen detection method$

16

Rapid malaria antigen test*

Rapid malaria antigen test$

17

Combo card test* ti, ab

Combo card test$ ti, ab

18

Immunoassay [MeSH]

Immunoassay [Emtree]

19

Chromatography [MeSH]

Chromatography [Emtree]

20

Enzyme‐linked immunosorbent assay [MeSH]

Enzyme‐linked immunosorbent assay [Emtree]

21

Rapid test* ti, ab

Rapid test$ ti, ab

22

Card test* ti, ab

Card test$ ti, ab

23

Rapid AND (detection* or diagnos*) ti, ab

Rapid AND (detection$ or diagnos$) ti, ab

24

5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23

5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23

25

4 and 19

4 and 19

26

Limit 20 to Humans

Limit 20 to Human

Appendix 2. Data extraction: characteristics of included studies

Study ID

First author, year of publication.

Clinical features and settings

Presenting signs and symptoms, previous treatments for malaria, clinical setting.

Participants

Sample size, age, sex, comorbidities or pregnancy, country and locality, P. falciparum malaria endemicity, endemic malaria species, average parasite density in microscopy positive cases.

Study design

Were consecutive patients enrolled retrospectively or prospectively?

Whether the sampling method was consecutive or random, or whether the method was not described but consecutive sampling was most probable.

If the study evaluated more than one RDT, how were tests allocated to individuals, or did each individual receive all the tests?

Target condition

Malaria parasitaemia.

Reference standard

The reference standard test(s) used.

If microscopy was used, who performed it, and where?

If microscopy was used, how many high power fields were looked at?

If microscopy was used, how many observers or repeats were used?

If microscopy was used, how were discrepancies between observers resolved?

Index tests

The parasite species the test was designed to detect, the commercial name, and the type of test. Batch numbers if provided. Transport and storage conditions. Details of the test operators, including any special training provided.

Notes

Source of funding.

Appendix 3. Data extraction and criteria for judgement: methodological quality

Quality indicator

Notes

Was the spectrum of patients representative of the spectrum of patients who will receive the test in practice?

  • 'Yes' if the inclusion criteria clearly stipulated people attending an ambulatory healthcare setting with symptoms of malaria, and the sampling method was consecutive or random.

  • 'No' if the sample was unrepresentative of people with uncomplicated malaria in general (for example, if the majority of participants also had some other presenting health problem, such as pneumonia). Where a proportion of potential participants were excluded due to recent antimalarial use, well defined comorbidities or pregnancy, the sample could be classed as representative because these groups may also be excluded from testing as normal clinical practice, depending on local policy and practice.

  • 'Unclear' if the source or characteristics of participants was not adequately described; or if the sampling method was not described.

Is the reference standard likely to correctly identify the target condition?

  • 'Yes' if microscopy was undertaken by experienced microscopists with adequate laboratory facilities. Laboratory facilities were assumed to be adequate unless the study report indicated otherwise. Slides were viewed by at least two independent observers, either for all slides or for those where there are discordant results between the index and the reference test. At least 100 microscopic fields were viewed before declaring a slide negative.

  • 'Yes' if reference standard was PCR.

  • 'No' if microscopy was undertaken by insufficiently trained individuals, by one individual only, or in a situation with inadequate equipment, or if they viewed less than 100 microscopic fields before declaring negative.

  • 'Unclear' if insufficient information was provided.

Is partial verification avoided?

  • 'Yes' if all participants who received the index test also received the reference test.

  • 'No' if not all the participants who received the index test also received the reference test.

  • 'Unclear' if insufficient information was provided to assess this.

If not all participants received the reference test, we reported how many did not.

Is differential verification avoided?

  • 'Yes' if the same reference test was used regardless of the index test results.

  • 'No' if different reference tests were used depending on the results of the index test.

  • 'Unclear' if insufficient information was provided.

If any participants received a different reference test, we reported the reasons stated for this, and how many participants were involved.

Is incorporation avoided? (the index test does not form part of the reference standard)

This should be 'Yes' for all studies, as the reference standard is defined in the inclusion criteria as microscopy or PCR.

Are the reference standard test results blinded?

  • 'Yes' if the person undertaking the reference test did not know the results of the index tests, if the two tests were carried out in different places, or it was clear that the reference test was undertaken and the results recorded before the index test.

  • 'No' if the same person performed both tests, or the results of the index tests were known to the person undertaking the reference tests.

  • 'Unclear' if insufficient information was provided.

Are the index test results blinded?

  • 'Yes' if the person undertaking the index test did not know the results of the reference tests, or if the two tests were carried out in different places, or it was clear that the index test was undertaken and the results recorded before the reference test.

  • 'No' if the same person performed both tests, or the results of the index tests were known to the person undertaking the reference tests.

  • 'Unclear' if insufficient information was provided.

Were uninterpretable results reported?

  • 'Yes' if the paper stated whether there were any uninterpretable or invalid results, and how those were handled; for example whether they were repeated until a valid result was obtained, or excluded from the analysis.

  • 'No' if the number of participants presented in the analysis did not match the number of participants originally enrolled in the study, and insufficient explanation was provided for any discrepancy.

  • 'Unclear' if uninterpretable or invalid test results were not mentioned, but the number of participants presented in the analysis corresponded to the number of participants reported to be originally recruited into the study, or if insufficient information was given to permit this judgement; for example if the original number of participants recruited into the study was unclear.

We reported how many results were uninterpretable (of the total) and how these were handled in the analysis.

Were any withdrawals explained?

  • 'Yes' if it was clear that no participants were excluded from the analysis (the number participants originally enrolled was clearly stated, and corresponded to the number presented in the analysis) or if exclusions were adequately described.

  • 'No' if there were participants missing or excluded from the analysis and there was no explanation given; usually where the number of participants reported to have been enrolled and the number presented in the analysis did not correspond.

  • 'Unclear' if not enough information was given to assess whether any participants were excluded from the analysis; for example if the original number of participants recruited into the study was unclear.

We reported how many participants were excluded from the analysis.

Appendix 4. Direct comparisons between test types

Study

Sensitivity (true positives/malaria cases) (%)

Difference (95% CI) (%)

P value

Specificity (true negatives/non‐cases) (%)

Difference (95% CI) (%)

P value

Type 2 versus Type 3

Type 2

Type 3

Type 2

Type 3

Ashton 2010

85 (209/246)

85 (209/246)

0 (‐6.3 to 6.3)

P = 1.00

96 (2052/2137)

96 (2060/2137)

0 (‐1.5 to 0.8 )

P = 0.58

Eibach 2013

80 (4/5)

60 (3/5)

20.0 (‐35.4 to 75.4)

P = 1.00

99 (716/722)

99 (718/722)

0 (‐1.1 to 0.6)

P = 0.75

Singh 2010

68 (39/57)

77 (44/57)

‐8.8 (‐25.0 to 7.5)

P = 0.40

98 (308/315)

98 (309/315)

0 (‐2.5 to 1.9)

P = 1.00

Type 2 versus Type 4

Type 2

Type 4

Type 2

Type 4

van den Broek 2006

75 (217/291)

88 (256/292)

‐13.1 (‐19.4 to ‐6.8)

P < 0.001

100 (604/605)

99 (598/604)

0.8 (0 to 1.7)

P = 0.07

Type 3 versus Type 4

Type 3

Type 4

Type 3

Type 4

Dev 2004

71 (5/7)

90 26/29

‐18.2 (‐53.5 to 17.0)

P = 0.24

100 (23/23)

100 (111/111)

0 (Not estimable)

Not estimable

Ratsimbasoa 2007

73 (11/15)

80 (12/15)

‐6.7 (‐36.8 to 23.5)

P = 1.0

98 (175/179)

97 (175/180)

0.50 (‐2.7 to 3.8)

P = 1.0

We presented the difference in sensitivities and specificities between test types compared within each study as percentages. If a study evaluated more than one commercial brand of a test type on the same patients against the same reference standard, we randomly selected one brand for the comparison of test types.

Appendix 5. Comparison of microscopy and PCR reference standards for non‐falciparum infections

Test type, RDT brand

Microscopy

PCR

Number of studies

Number of participants

Sensitivity (95% CI) (%)

Specificity (95% CI) (%)

Number of studies

Number of participants

Sensitivity (95% CI) (%)

Specificity (95% CI) (%)

Type 3, CareStart Pf/Pan

4

3544

74 (45 to 91)

99 (96 to 100)

1

179

91 (81 to 97)

100 (97 to 100)

Type 3, Parascreen

14

5407

79 (67 to 88)

98 (98 to 99)

2

659

84 (70 to 92)

99 (97 to 100)

Type 3, One Step Malaria Pf/Pan

1

606

70 (58 to 81)

99 (98 to 100)

1

606

72 (60 to 82)

97 (95 to 98)

Type 3, SD Malaria Antigen Bioline

4

3769

80 (73 to 85)

99 (98 to 100)

1

196

64 (41 to 83)

99 (97 to 100)

Type 4, OptiMAL

6

1843

90 (85 to 93)

98 (97 to 99)

1

313

88 (64 to 99)

98 (96 to 99)

Study flow diagram.
Figures and Tables -
Figure 1

Study flow diagram.

Methodological quality graph: review authors' judgements about each methodological quality item presented as percentages across all included studies.
Figures and Tables -
Figure 2

Methodological quality graph: review authors' judgements about each methodological quality item presented as percentages across all included studies.

Forest plot of commercial brands of Type 2 tests for detection of non‐falciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.
Figures and Tables -
Figure 3

Forest plot of commercial brands of Type 2 tests for detection of nonfalciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.

Summary ROC plot of Type 2 tests for detection of non‐falciparum species (verified with microscopy). The black solid circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.
Figures and Tables -
Figure 4

Summary ROC plot of Type 2 tests for detection of nonfalciparum species (verified with microscopy). The black solid circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.

Forest plot of commercial brands of Type 3 tests for detection of non‐falciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.
Figures and Tables -
Figure 5

Forest plot of commercial brands of Type 3 tests for detection of nonfalciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.

Summary ROC plot of Type 3 tests for detection of non‐falciparum species (verified with microscopy). The black solid circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.
Figures and Tables -
Figure 6

Summary ROC plot of Type 3 tests for detection of nonfalciparum species (verified with microscopy). The black solid circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.

Forest plot of commercial brands of Type 4 tests for detection of non‐falciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.
Figures and Tables -
Figure 7

Forest plot of commercial brands of Type 4 tests for detection of nonfalciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.

Summary ROC plot of Type 4 tests for detection of non‐falciparum species (verified with microscopy). The black circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.
Figures and Tables -
Figure 8

Summary ROC plot of Type 4 tests for detection of nonfalciparum species (verified with microscopy). The black circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.

Forest plot of Type 2, Type 3 and Type 4 tests for detection of non‐falciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.
Figures and Tables -
Figure 9

Forest plot of Type 2, Type 3 and Type 4 tests for detection of nonfalciparum species (verified with microscopy). We ordered studies by continent, age group and study identifier.

Summary ROC plot comparing Type 2, Type 3 and Type 4 tests for detection of non‐falciparum species (verified with microscopy). The solid circles correspond to the summary estimates of sensitivity and specificity for each test type, and are shown with 95% confidence regions (dotted lines) and 95% prediction regions (dashed lines). The summary points for Type 2 and Type 3 and their 95% confidence regions are identical but the 95% prediction regions differ. The 95% prediction regions illustrate the extent of between study heterogeneity.
Figures and Tables -
Figure 10

Summary ROC plot comparing Type 2, Type 3 and Type 4 tests for detection of nonfalciparum species (verified with microscopy). The solid circles correspond to the summary estimates of sensitivity and specificity for each test type, and are shown with 95% confidence regions (dotted lines) and 95% prediction regions (dashed lines). The summary points for Type 2 and Type 3 and their 95% confidence regions are identical but the 95% prediction regions differ. The 95% prediction regions illustrate the extent of between study heterogeneity.

Summary ROC plot of Type 3 tests for detection of non‐falciparum species (verified with PCR). The solid circles correspond to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.
Figures and Tables -
Figure 11

Summary ROC plot of Type 3 tests for detection of nonfalciparum species (verified with PCR). The solid circles correspond to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.

Forest plot of Pf HRP‐2 and Pv pLDH for detection of P. vivax (verified with microscopy). Studies are ordered by continent, age group and study identifier.
Figures and Tables -
Figure 12

Forest plot of Pf HRP‐2 and Pv pLDH for detection of P. vivax (verified with microscopy). Studies are ordered by continent, age group and study identifier.

Summary ROC plot Pf HRP‐2 and Pv pLDH for detection of P. vivax (verified with microscopy). The black circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.
Figures and Tables -
Figure 13

Summary ROC plot Pf HRP‐2 and Pv pLDH for detection of P. vivax (verified with microscopy). The black circle corresponds to the summary estimate of sensitivity and specificity, and is shown with a 95% confidence region.

Non‐falciparum species only, microscopy, Type 2, ICT Combo Cassette.
Figures and Tables -
Test 1

Nonfalciparum species only, microscopy, Type 2, ICT Combo Cassette.

Non‐falciparum species only, microscopy, Type 2, ICT Malaria Pf/Pv.
Figures and Tables -
Test 2

Nonfalciparum species only, microscopy, Type 2, ICT Malaria Pf/Pv.

Non‐falciparum species only, microscopy, Type 2, NOW Malaria ICT.
Figures and Tables -
Test 3

Nonfalciparum species only, microscopy, Type 2, NOW Malaria ICT.

Non‐falciparum species only, microscopy, Type 2, Malascan.
Figures and Tables -
Test 4

Non‐falciparum species only, microscopy, Type 2, Malascan.

Non‐falciparum species only, microscopy, Type 2, VIKIA Ag Pf/Pan.
Figures and Tables -
Test 5

Non‐falciparum species only, microscopy, Type 2, VIKIA Ag Pf/Pan.

Non‐falciparum species only, microscopy, Type 2 (All).
Figures and Tables -
Test 6

Nonfalciparum species only, microscopy, Type 2 (All).

Non‐falciparum species only, microscopy, Type 3, Parascreen.
Figures and Tables -
Test 7

Non‐falciparum species only, microscopy, Type 3, Parascreen.

Non‐falciparum species only, microscopy, Type 3, CareStart Pf/Pan.
Figures and Tables -
Test 8

Non‐falciparum species only, microscopy, Type 3, CareStart Pf/Pan.

Non‐falciparum species only, microscopy, Type 3, SD Malaria Antigen Bioline.
Figures and Tables -
Test 9

Non‐falciparum species only, microscopy, Type 3, SD Malaria Antigen Bioline.

Non‐falciparum species only, microscopy, Type 3, First Response Malaria Combo.
Figures and Tables -
Test 10

Non‐falciparum species only, microscopy, Type 3, First Response Malaria Combo.

Non‐falciparum species only, microscopy, Type 3, One Step Malaria Pf/Pan.
Figures and Tables -
Test 11

Non‐falciparum species only, microscopy, Type 3, One Step Malaria Pf/Pan.

Non‐falciparum species only, microscopy, Type 3 (All).
Figures and Tables -
Test 12

Non‐falciparum species only, microscopy, Type 3 (All).

Non‐falciparum species only, microscopy, Type 4, OptiMAL.
Figures and Tables -
Test 13

Nonfalciparum species only, microscopy, Type 4, OptiMAL.

Non‐falciparum species only, microscopy, Type 4, OptiMAL‐IT.
Figures and Tables -
Test 14

Non‐falciparum species only, microscopy, Type 4, OptiMAL‐IT.

Non‐falciparum species only, microscopy, Type 4, Carestart.
Figures and Tables -
Test 15

Non‐falciparum species only, microscopy, Type 4, Carestart.

Non‐falciparum species only, microscopy, Type 4 (All).
Figures and Tables -
Test 16

Non‐falciparum species only, microscopy, Type 4 (All).

Non‐falciparum species only, microscopy, Other Type, Malariagen Malaria.
Figures and Tables -
Test 17

Nonfalciparum species only, microscopy, Other Type, Malariagen Malaria.

Non‐falciparum species only, PCR, Type 3, CareStart Pf/Pan.
Figures and Tables -
Test 18

Non‐falciparum species only, PCR, Type 3, CareStart Pf/Pan.

Non‐falciparum species only, PCR, Type 3, Parascreen.
Figures and Tables -
Test 19

Non‐falciparum species only, PCR, Type 3, Parascreen.

Non‐falciparum species only, PCR, Type 3, One Step Malaria Pf/Pan.
Figures and Tables -
Test 20

Non‐falciparum species only, PCR, Type 3, One Step Malaria Pf/Pan.

Non‐falciparum species only, PCR, Type 3, SD Malaria Antigen Bioline.
Figures and Tables -
Test 21

Non‐falciparum species only, PCR, Type 3, SD Malaria Antigen Bioline.

Non‐falciparum species only, PCR, Type 3 (All).
Figures and Tables -
Test 22

Non‐falciparum species only, PCR, Type 3 (All).

Non‐falciparum species only, PCR, Type 4, OptiMAL (All).
Figures and Tables -
Test 23

Non‐falciparum species only, PCR, Type 4, OptiMAL (All).

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Carestart Pf/Pv (All).
Figures and Tables -
Test 24

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Carestart Pf/Pv (All).

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Biotech Malaria Pf/Pv.
Figures and Tables -
Test 25

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Biotech Malaria Pf/Pv.

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Falcivax.
Figures and Tables -
Test 26

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Falcivax.

P. vivax, microscopy, Pf HRp‐2 and Pv pLDH, Onsite Pf/Pv.
Figures and Tables -
Test 27

P. vivax, microscopy, Pf HRp‐2 and Pv pLDH, Onsite Pf/Pv.

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device.
Figures and Tables -
Test 28

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device.

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH (All).
Figures and Tables -
Test 29

P. vivax, microscopy, Pf HRP‐2 and Pv pLDH (All).

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Falcivax.
Figures and Tables -
Test 30

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Falcivax.

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, OnSite Pf/Pv.
Figures and Tables -
Test 31

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, OnSite Pf/Pv.

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device.
Figures and Tables -
Test 32

P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device.

P. vivax, PCR, Pf HRP‐2 and Pv pLDH (All).
Figures and Tables -
Test 33

P. vivax, PCR, Pf HRP‐2 and Pv pLDH (All).

P. vivax, PCR, Type 6, PALUTOP (All).
Figures and Tables -
Test 34

P. vivax, PCR, Type 6, PALUTOP (All).

Summary of findings Performance of RDTs for diagnosis of non‐falciparum or P. vivax malaria

Patients/populations

People presenting with symptoms suggestive of uncomplicated malaria 

Prior testing

None

Settings

Ambulatory healthcare settings in P. vivax,P. malariae or P. ovale malaria endemic areas in Asia, Africa and South America

Index tests

Immunochromatography‐based rapid diagnostic tests (RDTs) for non‐falciparum malaria in the absence of P. falciparum co‐infection, or P. vivax malaria with or without other malaria species 

Reference standard

Conventional microscopy, polymerase chain reaction (PCR)

Importance

Accurate and fast diagnosis allows appropriate and quick treatment for malaria to be provided

Studies

37 unique publications reporting 47 studies (22,862 participants)

Quality concerns

Poor reporting of patient characteristics, sampling method and reference standard methods were common concerns

Test type

Quantity of evidence

Number of evaluations (malaria cases/participants)

Average sensitivity (95% CI)

Average specificity (95% CI)

Prevalence (%)

Consequences in a cohort of 1000

Missed cases

False positives

Target condition (reference standard): non‐falciparum malaria (microscopy)

Type 2

HRP‐2 (P. falciparum specific) and aldolase (pan‐specific)

11 (958/6879)

78% (73% to 82%)

99% (97% to 99%)

5

11

10

15

33

9

30

66

7

Type 3

HRP‐2 (P. falciparum specific) and pLDH (pan‐specific)

23 (1537/11,234)

78% (69% to 84%)

99% (98% to 99%)

5

11

10

15

33

9

30

66

7

Type 4

pLDH (P. falciparum specific) and pLDH (pan‐specific)

10 (986/3831)

89% (79% to 95%)

98% (97% to 99%)

5

6

19

15

17

17

30

33

14

Target condition (reference standard): non‐falciparum malaria (PCR)

Type 3

HRP‐2 (P. falciparum specific) and pLDH (pan‐specific)

5 (300/1639)

81% (72% to 88%)

99% (97% to 99%)

5

10

10

15

29

9

30

57

7

Target condition (reference standard): P.vivax with or without other malaria species (microscopy)

HRP‐2 (P. falciparum specific) and pLDH (P. vivax‐specific)

8 (580/3682)

95% (86% to 99%)

99% (99% to 100%)

5

3

10

15

8

9

30

15

7

Conclusions: The majority of studies evaluated RDTs which are designed to differentiate falciparum malaria from non‐falciparum malaria, but cannot differentiate between different non‐falciparum species or identify non‐falciparum malaria species within a mixed infection. In these types of tests, specificity for non‐falciparum malaria in the absence ofP. falciparum infection was high, but sensitivity was low, tests missing between 11% and 22% of non‐falciparum cases. RDTs which are designed to detect P. vivax specifically, whether alone or part of a mixed infection, were more accurate with tests missing less than 5% of P. vivax cases. This review can help decision‐making about which RDT to use, in combination with other published information about in vitro test performance and stability in the field.

Figures and Tables -
Summary of findings Performance of RDTs for diagnosis of non‐falciparum or P. vivax malaria
Table 1. Types of malaria RDTs by antigen combination and parasite species detected

Type of test

Antigen combinations

Possible results

Type 1

HRP‐2 (P. falciparum specific)

No Pf; Pf; invalid

Type 2

HRP‐2 (P. falciparum specific) and aldolase (pan‐specific)

No malaria; Pf or mixed; Pv, Pf, or Pm; invalid

Type 3

HRP‐2 (P. falciparum specific) and pLDH (pan‐specific)

No malaria; Pf or mixed; Pv, Pf, or Pm; invalid

Type 4

pLDH (P. falciparum specific) and pLHD (pan‐specific)

No malaria; Pf or mixed; Pv, Pf, or Pm; invalid

Type 5

pLDH (P. falciparum specific) and pLHD (P. vivax‐specific)

No malaria; Pf; Pv; Pf and Pv; invalid

Type 6

HRP‐2 (P. falciparum specific), pLHD (pan‐specific) and pLDH (P. vivax specific)

No malaria; Pf and Pv ± Po and/or Pm;  Pf ± Po and/or Pm;  Pv ± Po or Pm; Po or Pm; invalid

Type 7

Aldolase (pan‐specific)

No malaria; Pf, Pv, Po,or Pm; invalid

Other

HRP‐2 (P. falciparum specific) and pLDH (P. vivax specific)

No malaria; Pf; Pv; Pf and Pv; invalid

Figures and Tables -
Table 1. Types of malaria RDTs by antigen combination and parasite species detected
Table 2. Malaria 'zones' by endemic parasite species and type of test appropriate for each

Zone

Endemic malaria parasites

Geographic area

Appropriate test type

1

P. falciparum only or other species almost always as a mixed infection

Most of sub‐Saharan Africa; lowland Papua New Guinea

Tests using HRP‐2 to detect P. falciparum only

(Type 1)

2

Both P. falciparum and P. vivax, most commonly as a single species

 

Asia and the Americas; Ethiopian highlands

 

Combination RDTs which detect all species and distinguish between P. falciparum and P. vivax

(Types 2 to 6)

3

Nonfalciparum only

 

Vivax‐only areas of East Asia and Central Asia; some highland areas elsewhere

Pan‐specific or vivax‐specific RDTs

(Type 7; Pan‐pLDH only; vivax‐pLDH only)

Figures and Tables -
Table 2. Malaria 'zones' by endemic parasite species and type of test appropriate for each
Table 3. Number of studies by RDT type and reference standard

Type of RDT

Number of study cohorts (test evaluations) by reference standard

Microscopy

PCR

Non‐falciparum species in the absence of P. falciparum

Type 2

11 (11)

0 (0)

Type 3

23 (25)

5 (5)

Type 4

10 (11)

1 (1)

Other type

1 (1)

0 (0)

P. vivax

Pf HRP2 and Pv pLDH

8 (9)

2 (3)

Type 6

0 (0)

1 (1)

Figures and Tables -
Table 3. Number of studies by RDT type and reference standard
Table 4. False negatives for non‐falciparum and P. vivax by RDT type

Study

Test 

Number of false negatives

% false negatives indicating 'no malaria'

% false negatives indicating 'P. falciparum'

Type 2 tests

Ashton 2010

ICT Combo

37

22

78

Bell 2001a

ICT Malaria trial 1

16

13

88

Bell 2001b

ICT Malaria trial 2

6

67

33

Fernando 2004

ICT Malaria Pf/Pv

29

100

0

Harani 2006

ICT Malaria Pf/Pv

3

67

33

Singh 2000a

ICT Malaria Pf/Pv

13

62

38

Singh 2010

Malascan

18

67

33

Tjitra 1999

ICT Malaria Pf/Pv

8

75

25

van den Broek 2006

NOW malaria ICT

72

67

33

Wongsrichanalai 2003

ICT Malaria Pf/Pv

9

67

33

van den Broek 2006

OptiMAL‐IT

34

74

26

Median (range)

67 (13 to 100)

33 (0 to 88)

Pooled estimate (95% CI)*

65 (43 to 81)

35 (19 to 57)

Type 3 tests

Ashton 2010

Carestart

37

22

78

Ashton 2010

Parascreen

43

14

86

Bendezu 2010

Parascreen

19

84

16

Bharti 2008

First response

7

100

0

Dev 2004

Diamed OptiMAL

3

100

0

Eibach 2013

CareStart

3

100

0

Elahi 2013

Parascreen

5

60

40

Kosack 2013

SD Bioline

133

89

11

Moges 2012

Carestart

38

89

11

Ratsimbasoa 2007

SD Malaria Antigen Bioline

4

100

0

Singh 2010

Parascreen

13

54

46

Singh 2010

First response

9

33

67

Singh 2010

ParaHIT Total

48

92

8

Trouvay 2013

SD Malaria Ag Pf/Pan

18

78

22

Yan 2013

Pf/Pan Device

24

25

75

Median (range)

84 (14 to 100)

16 (0 to 86)

Pooled estimate (95% CI)

74 (52 to 88)

26 (12 to 48)

Type 4 tests

Andrade 2010

OptiMAL‐IT

0

0

0

Chayani 2004

OptiMAL

3

100

0

Dev 2004

SD Malaria

2

100

0

Kolaczinski 2004

OptiMAL

23

100

0

Metzger 2011

OptiMAL‐IT

30

100

0

Pattanasin 2003

OptiMAL‐IT

26

65

35

Ratsimbasoa 2007

OptiMAL‐IT

2

100

0

Ratsimbasoa 2007

Carestart Malaria

3

33

67

Singh 2003

OptiMAL (field)

0

0

0

Soto Tarazona 2004

OptiMAL

3

100

0

Valecha 2003

OptiMAL

13

77

23

Median (range)

100 (0 to 100)

0 (0 to 67)

Pooled estimate (95% CI)

87 (79 to 92)

13 (8 to 21)

*The pooled estimates of the percentage of false negatives indicating 'no malaria' and the percentage of false negatives indicating 'P. falciparum' were computed by using a random effects logistic regression model for Type 2 and Type 3. A fixed effects logistic regression model was used for Type 4.

This table shows participants with non‐falciparum malaria monoinfection identified by microscopy who were negative by non‐falciparum monoinfection by RDT, by whether the RDT incorrectly identified the participant as not having malaria, or as having P. falciparum malaria.

Figures and Tables -
Table 4. False negatives for non‐falciparum and P. vivax by RDT type
Table 5. Non‐falciparum infections by RDT types verified by microscopy

RDT Type

Study cohort

Participants

Malaria cases

Pooled sensitivity

(95% CI) (%)

Pooled specificity

(95% CI) (%)

Test1

Type 2

11

6879

958

78 (73 to 82)

99 (97 to 99)

P = 0.008

Type 3

23

11,234

1537

78 (69 to 85)

99 (98 to 99)

Type 4

10

3831

986

90 (79 to 95)

98 (97 to 99)

Other type

1

262

12

92 (62 to 100)

95 (92 to 98)

1Likelihood ratio test for evidence of a difference in sensitivity or specificity, or both, between Types 2, 3, and 4.

*Only one test brand (randomly selected) from each cohort is included in the analysis of each type.

Figures and Tables -
Table 5. Non‐falciparum infections by RDT types verified by microscopy
Table 6. Comparisons of RDT types for non‐falciparum infections verified by microscopy

Ratio of sensitivity

(95% CI),

P value for comparison

Ratio of specificity

 (95% CI),

P value for comparison 

 

Type 2

Type 3

Studies (participants)

11 (6879)

23 (11,234)

 

Studies (participants)

Sensitivity  (95% CI)

Specificity  (95% CI)

78 (73 to 82)

99 (97 to 99)

78 (69 to 84)

99 (98 to 99)

Type 2

11 (6879)

78 (73 to 82)

99 (97 to 99)

Type 3

23 (11,234)

78 (69 to 84)

99 (98 to 99)

1.00 (0.89 to 1.12), P = 1.00

1.00 (0.99 to 1.01), P = 0.87

Type 4

10 (3831)

90 (79 to 95)

98 (97 to 99)

0.87 (0.78 to 0.96), P = 0.01

1.00 (0.99 to 1.02), P = 0.52

0.87 (0.76 to 0.99), P = 0.03

1.01 (1.00 to 1.02), P = 0.29

We computed the ratio of sensitivities and specificities by division of the sensitivity and specificity for the column by the sensitivity and specificity for the row. If the ratio of sensitivities is greater than one, the sensitivity of the test for the column is higher than that for the row; if less than one, the sensitivity of the test in the row is higher than in the column. The same applies to the ratio of specificities.

Figures and Tables -
Table 6. Comparisons of RDT types for non‐falciparum infections verified by microscopy
Table Tests. Data tables by test

Test

No. of studies

No. of participants

1 Nonfalciparum species only, microscopy, Type 2, ICT Combo Cassette Show forest plot

1

2383

2 Nonfalciparum species only, microscopy, Type 2, ICT Malaria Pf/Pv Show forest plot

7

3151

3 Nonfalciparum species only, microscopy, Type 2, NOW Malaria ICT Show forest plot

1

246

4 Non‐falciparum species only, microscopy, Type 2, Malascan Show forest plot

1

372

5 Non‐falciparum species only, microscopy, Type 2, VIKIA Ag Pf/Pan Show forest plot

1

727

6 Nonfalciparum species only, microscopy, Type 2 (All) Show forest plot

11

6879

7 Non‐falciparum species only, microscopy, Type 3, Parascreen Show forest plot

14

5407

8 Non‐falciparum species only, microscopy, Type 3, CareStart Pf/Pan Show forest plot

4

3544

9 Non‐falciparum species only, microscopy, Type 3, SD Malaria Antigen Bioline Show forest plot

4

3769

10 Non‐falciparum species only, microscopy, Type 3, First Response Malaria Combo Show forest plot

2

663

11 Non‐falciparum species only, microscopy, Type 3, One Step Malaria Pf/Pan Show forest plot

1

606

12 Non‐falciparum species only, microscopy, Type 3 (All) Show forest plot

23

11234

13 Nonfalciparum species only, microscopy, Type 4, OptiMAL Show forest plot

6

1843

14 Non‐falciparum species only, microscopy, Type 4, OptiMAL‐IT Show forest plot

4

1987

15 Non‐falciparum species only, microscopy, Type 4, Carestart Show forest plot

1

195

16 Non‐falciparum species only, microscopy, Type 4 (All) Show forest plot

10

3831

17 Nonfalciparum species only, microscopy, Other Type, Malariagen Malaria Show forest plot

1

262

18 Non‐falciparum species only, PCR, Type 3, CareStart Pf/Pan Show forest plot

1

178

19 Non‐falciparum species only, PCR, Type 3, Parascreen Show forest plot

2

659

20 Non‐falciparum species only, PCR, Type 3, One Step Malaria Pf/Pan Show forest plot

1

606

21 Non‐falciparum species only, PCR, Type 3, SD Malaria Antigen Bioline Show forest plot

1

196

22 Non‐falciparum species only, PCR, Type 3 (All) Show forest plot

5

1639

23 Non‐falciparum species only, PCR, Type 4, OptiMAL (All) Show forest plot

1

313

24 P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Carestart Pf/Pv (All) Show forest plot

3

2000

25 P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Biotech Malaria Pf/Pv Show forest plot

1

250

26 P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Falcivax Show forest plot

2

710

27 P. vivax, microscopy, Pf HRp‐2 and Pv pLDH, Onsite Pf/Pv Show forest plot

2

710

28 P. vivax, microscopy, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device Show forest plot

1

350

29 P. vivax, microscopy, Pf HRP‐2 and Pv pLDH (All) Show forest plot

8

3682

30 P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Falcivax Show forest plot

1

338

31 P. vivax, PCR, Pf HRP‐2 and Pv pLDH, OnSite Pf/Pv Show forest plot

1

338

32 P. vivax, PCR, Pf HRP‐2 and Pv pLDH, Pf/Pv Malaria Device Show forest plot

1

350

33 P. vivax, PCR, Pf HRP‐2 and Pv pLDH (All) Show forest plot

2

688

34 P. vivax, PCR, Type 6, PALUTOP (All) Show forest plot

1

313

Figures and Tables -
Table Tests. Data tables by test