Microscopic and submicroscopic Plasmodium falciparum infection, maternal anaemia and adverse pregnancy outcomes in Papua New Guinea: a cohort study

Table 1 Point prevalence malaria infection at study visits

Study visit	No infection % (n)	Submicroscopic infection % (n)	Microscopic infection % (n)
Enrolment (n = 2190)
P. falciparum^a	90.2 (1976)	5.1 (111)	4.7 (103)
P. vivax mono-infection	97.2 (2129)	2.2 (48)	0.6 (13)
Second study visit (n = 1015)
P. falciparum	98.5 (1000)	0.7 (7)	0.8 (8)
Third study visit (n = 859)
P. falciparum	97.8 (841)	1.1 (9)	1.1 (9)
Delivery—peripheral blood (n = 1936)
P. falciparum	96.5 (1869)	1.5 (29)	2.0 (38)
P. vivax mono-infection	98.3 (1904)	1.6 (30)	0.1 (2)
Delivery—placental blood (n = 1300)
P. falciparum^b	96.6 (1256)	1.1 (14)	2.3 (30)
P. vivax mono-infection	99.5 (1293)	0.5 (7)	0.0 (0)

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