The epidemiology of subclinical malaria infections in South-East Asia: findings from cross-sectional surveys in Thailand–Myanmar border areas, Cambodia, and Vietnam

Table 5 Mild and moderate anaemia in relation to P. falciparum and P. vivax infections

HVUSqPCR results	No anaemia; Hb ≥11 g/dL		Mild Hb 8–<11 g/dL		Moderate Hb <8 g/dL		Total
Negative^a	3174	82 %	619	16 %	96	2 %	3889
Pf	126	77 %	30	18 %	7	4 %	163
Mixed	45	85 %	7	13 %	1	2 %	53
Plasmodium spp.^b	338	84 %	61	15 %	4	1 %	403
Pv	310	88 %	39	11 %	5	1 %	354
Not done	104	60 %	59	34 %	11	6 %	174
Total	4097	81 %	815	16 %	124	2 %	5036

HVUSqPCR, high volume ultra-sensitive real time polymerase chain reaction; Hb, haemoglobin; g/dL, grams per decilitre; Pf, P. falciparum, mixed more than one Plasmodium species identified; Plasmodium spp., Plasmodium species was not identified; Pv, P. vivax
^aNegative = participants without evidence of parasitaemia by HVUSqPCR
^bHVUSqPCR assay could not be performed because sample size was not sufficient or other technical reasons