Skip to main content

Table 1 Sensitivity and specificity of nested PCR to Plasmodium detection according to the different blood storage conditions.

From: Low sensitivity of nested PCR using Plasmodium DNA extracted from stained thick blood smears: an epidemiological retrospective study among subjects with low parasitaemia in an endemic area of the Brazilian Amazon region

  Blood Storage Device
Microscopic examination Thick Blood Smears Filter-papers
  Positive Negative Positive Negative
Positive 40 22 45 17
Negative 22 285 120 187
Total 62 307 165 204
Sensitivity 65% 73%
Specificity 93% 61%
Observed concordance 88% 63%
Kappa coefficient (95%) 0.57 0.20