Table 2.

Summary Plasmodium species of human blood collected Laos and Vietnam by PCR analysis

	Laos		Vietnam
	Microscopy (+)	Microscopy (−)	Microscopy (+)
No. of examined by PCR	35	75	25
No. of Plasmodium spp. positive by PCR	35	30	25
Detected Plasmodium species by PCR
P. falciparum	21	12	16
P. vivax	0	9	2
P. falciparum + P. vivax	5	6	4
P. falciparum + P. malariae	2	0	0
P. vivax + P. knowlesi	1	1	3
P. falciparum + P. vivax + P. malariae	1	0	0
P. falciparum + P. vivax + P. knowlesi	5	2	0
No. of PCR positive by age group
≤ 5 years	10	8	4
6–14 years	14	9	5
≥ 15 years	11	13	16
No. of PCR positive by gender
Male	16	10	14
Female	19	20	11