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Table 3 PfLDH RDT’s sensitivity & the parasitaemia among RDT false-negatives* (n = 225)

From: Field performance of Plasmodium falciparum lactate dehydrogenase rapid diagnostic tests during a large histidine-rich protein 2 deletion survey in Ethiopia

  pfldh PCR  
PfLDH RDTs Pos Ng Total Sensitivity = 69%
 Pos 506 55 561 PPV = 90.2
 Ng 225* 34 259 Specificity = 38%
 Total 731 89 820  
Parasitaemia (p/µl) Number (%)
 < 100 (range 3–95 p/µl) 66 (29)
100–200 17 (8)
200–500 33 (15)
500–1000 29 (13)
1000–2000 28 (12)
 > 2000 52 (23)
Total 225* (100)
  1. Key: * = RDT false-negative samples
  2. Ng  negative, Pos positive
  3. A total of 225 pfldh PCR positives were not detected by PfLDH RDTs