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Table 2 Variation in malaria positivity of samples between RDT, microscopy and nPCR in the study area (Tigray, Amhara and Benishangul-Gumuz Regions), 2015

From: Assessment of subpatent Plasmodium infection in northwestern Ethiopia

Diagnostic methods

Species diagnosed

Number of positives

Percent positivity (95% CI)

Percent relative change from PCR

RDT (n = 2606)

P. falciparum (HRP2+)

50

1.9 (1.5–2.5)

− 37.5

P. vivax/P. malariae/P. ovale (panLDH+)

12

0.5 (0.3–0.8)

0.0

P. falciparum or mixed (HRP2 and panLDH+)

11

0.4 (0.2–0.7)

N/A

Total Plasmodium positive

73

2.8 (2.2–3.5)

− 16.1

Microscopy (n = 2605)

P. falciparum

25

1.0 (0.6—1.4)

− 68.8

P. vivax

4

0.2 (0.0–0.4)

− 60.0

Mixed P. falciparum + P. vivax

2

0.08 (0.0–.03)

− 33.3

Total Plasmodium positive

31

1.2 (0.8–1.7)

− 64.4

nPCR (n = 2608)

P. falciparum monoinfection

80

3.1 (2.5–3.8)

 

P. vivax monoinfection

10

0.4 (0.2–0.7)

 

Mixed P. falciparum + P. vivax

3

0.1 (0.0–0.4)

 

Mixed P. falciparum + P. malariae

2

0.07 (0.0–0.3)

 

Total Plasmodium positive

87

3.3 (2.7–4.1)

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