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Table 3 Parascreen™ sensitivity, PPV and False-negative proportion at different parasitaemia determined by expert microscopy.

From: Field evaluation of a rapid diagnostic test (Parascreen™) for malaria diagnosis in the Peruvian Amazon

Parascreen™ Parasite
density
(parasites/ul)
N
(Number of samples)
Sensitivity
[%(95%CI)]
PPV
[%(95%CI)]
False - negative
proportion
[%(95%CI)]
P. vivax      
  1-99 8 12.5 (2.2-47.1) 100 87.5 (52.9-97.8)
  100-499 15 60.0 (35.7-80.2) 100 40.0 (19.8-64.3)
  500-999 13 84.6 (57.8-95.7) 100 15.4 (4.3-42.2)
  1,000-4,999 35 91.4 (77.6-97.0) 100 8.6 (3.0-22.4)
  + 5,000 12 91.7 (64.6-98.5) 100 8.3 (1.5-35.4)
P. falciparum      
  1-999 5 25.0 (4.6-69.9) 100 75.0 (30.1-95.4)
  1,000-1,999 3 66.7 (20.8-93.9) 100 33.3 (6.1-79.2)
  2,000-4,999 4 75.0 (30.1-95.4) 100 25.0 (4.6-69.9)
  + 5,000 3 66.7 (20.8-93.9) 100 33.3 (6.1-79.2)
  1. a,b.- Abbreviations as in Table 2