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Table 3 Malariometric indices

From: Epidemiology of forest malaria in central Vietnam: a large scale cross-sectional survey

Indicators (N = 4,306) n (%) [95%CI]
- Prevalence of fever cases 668 (15.5) [12.5; 18.5]
- Fever cases attributable to malaria 125 (18.7) [13.7; 23.7]
- Spleen rate (n = 301) 301 (7.0) [4.3; 9.7]
- Median age if enlarged spleen [range] 30 y [11; 60]
- Mean parasite rate 571 (13.3) [10.6; 15.9]
- Species distribution (n = 571):   
P. falciparum 276 (48.3) [41.3; 55.3]
P. vivax 261 (45.7) [39.0; 52.4]
P. malariae 3 (0.5) [0; 1.1]
Mixed infections 31 (5.4) [3.2; 7.6]
- Parasite density/μl (geometric mean):   
P. falciparum 178.3 [141.2; 225.2]
P. vivax 51.5 [44.0; 60.3]
- Proportion of asymptomatic infections 423 (74.1) [67.8; 80.4]
- P. falciparum sero-prevalence (N = 4,253) 1,085 (25.5) [20.7; 30.3]