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Table 1 Age-specific gametocyte densities with measures of transmission success in rural Cameroon [11] and published data sets [9,10].

From: Age-structured gametocyte allocation links immunity to epidemiology in malaria parasites

   Gametocyte density   
Study Site age group N Geometric mean/μ l (± CI95%) Normalized 95%Confidence Intervals Standardized Morisita Index Variance/mean Mean proportion mosquitoes infected ± s.e. (n) Proportional contribution to human infectious reservoir
Cameroon 0–5 40 3.56
(0.8–6.32)
1.04 0.521 12.4 0.22 ± 0.05
(17)
0.32
  6–9 36 3.54
(0.88–6.2)
1.00 0.518 10.0 0.25 ± 0.05
(14)
0.43
  10–15 28 2.84
(0.04–5.64)
1.05 0.531 11.6 0.13 ± 0.06
(7)
0.11
  15+ 33 3.71
(0.64–6.88)
1.20 0.528 13.6 0.09 ± 0.04
(12)
0.10
Kenya 1–4 33 29.3
(27.1–31.7)
1.00    0.16 (20) 0.38
  5–9 36 30.7
(27.8–33.8)
1.33    0.14 (20) 0.34
  10–14 17 29
(26.0–32.9)
1.50    0.07 (18) 0.09
    Gametocytes/red blood cells
(×10-2) ± SD
   
Sri Lanka 0–5 47 2.2 ± 3 1.85    0.14 0.11
P. vivax 6–15 122 1.3 ± 2 1.00    0.32 0.27
  16–25 75 1.9 ± 2 1.42    0.28 0.32
  26–50 82 1.4 ± 2 1.11    0.23 0.28
P. falciparum 0–5 26 0.07 ± 0.3 1.17    0.08 0.01
  6–20 130 0.09 ± 0.4 1.00    0.49 0.68
  21–50 187 0.13 ± 0.5 1.27    0.39 0.30
  50+ 27 0.16 ± 0.5 2.20    0.04 0.01
  1. Differences in the upper and lower 95% confidence intervals are normalized within each study by dividing by the lowest value. The proportional contribution to the infectious reservoir is the proportion of an age group that are infectious to mosquitoes multiplied by the proportion of mosquitoes that become infected. In bold, values for the least dispersed gametocyte densities and the highest mosquito infection rates; in italics the highest gametocyte densities. N is the number of individuals with gametocyte parasites and n is the number of individuals infecting mosquitoes.