Table 2 Prevalence of Plasmodium spp. infections of study participants
|  | 2005 (n = 2527) | 2013 (n = 2486) | p-value | ||
|---|---|---|---|---|---|
Parasite detection by light microscopy | |||||
 All species | 1121/2527 | 44.4% | 206/2486 | 8.3% | < 0.001 |
 P. falciparum | 756/2527 | 29.9% | 139/2486 | 5.6% | < 0.001 |
  Asexual parasites | 730/2527 | 28.9% | 128/2486 | 5.2% | < 0.001 |
  Gametocytes | 80/2527 | 3.2% | 33/2486 | 1.3% | < 0.001 |
  Geometric mean density (SD) | 464.2 | (6.8) | 487.3 | (9.3) | 0.798 |
 P. vivax | 368/2527 | 14.6% | 69/2486 | 2.8% | < 0.001 |
  Asexual parasites |  |  | 69/2486 | 2.8% |  |
  Gametocytes |  |  | 19/2486 | 0.8% |  |
  Geometric mean density (SD) | 193.2 | (4.2) | 218.5 | (5.6) | 0.531 |
 P. malariae | 99/2527 | 9.0% | 6/2486 | 0.2% | < 0.001 |
 P. ovale | 0/2527 | 0.0% | 2/2486 | 0.1% | 0.246 |
 Mixed any species | 100/2527 | 6.5% | 9/2486 | 0.4% | < 0.001 |
Parasite detection by molecular method | |||||
 All species | 1844/2527 | 73.0% | 303/2486 | 12.2% | < 0.001 |
 P. falciparum | 1387/2527 | 54.9% | 212/2486 | 8.5% | < 0.001 |
  Gametocytes | NA |  | 94/2486 | 3.8% |  |
 P. vivax | 901/2527 | 35.7% | 139/2486 | 5.6% | < 0.001 |
  Gametocytes | NA |  | 23/2486 | 0.9% |  |
 P. malariae | 338/2527 | 13.4% | 28/2486 | 1.1% | < 0.001 |
 P. ovale | 121/2527 | 4.8% | 29/2486 | 1.2% | < 0.001 |
 Mixed any species | 723/2527 | 28.6% | 93/2486 | 3.7% | < 0.001 |
  Mixed with P. falciparum | 683/2527 | 27.0% | 86/2486 | 3.5% |  |
  Mixed non-P. falciparum | 40/2527 | 1.6% | 7/2486 | 0.3% |  |
 Symptomatic infections of any species | 132/2527 | 5.2% | 80/2486 | 3.2% | < 0.001 |