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Table 4 Comparative LOD results of Microscopy, ICTs and RTPCR performed on blood specimens from representative (n = 3 per species) patient specimens for each malaria species.

From: Multiplex real-time quantitative PCR, microscopy and rapid diagnostic immuno-chromatographic tests for the detection of Plasmodium spp: performance, limit of detection analysis and quality assurance

Species

% Parasitaemia Distribution

Microscopy

BINAXNOW

CARESTART

QPCR

P. falciparum 1

Parasitaemia 5.6%

    
 

   88.2% Single Rings

1.00E-03

1.00E-04

1.00E-03

1.00E-05

 

   11.8% Double Rings

    

P. falciparum

Parasitaemia 0.6%

    
 

   100% Single Rings

1.00E-02

1.00E-03

1.00E-03

1.00E-04

P. falciparum 3

Parasitaemia 22.1%

    
 

   86.8% Single Rings

1.00E-02

1.00E-04

1.00E-04

1.00E-05

 

   13.2% Double Rings

    

P. vivax 1

Parasitaemia 0.474%

    
 

   19.1% single rings

ND

1.00E-01

1.00E-02

1.00E-05

 

   57.4% growing trophozoites

    
 

   19.1% mature trophozoites

    
 

   4.2% gametocytes

    

P. vivax 2

Parasitaemia 0.728%

    
 

   54.7% rings

ND

1.00E-01

1.00E-02

1.00E-05

 

   45.3% growing trophozoites

    

P. vivax 3

Parasitaemia 0.061%

    
 

   70% growing trophozoites

ND

1.00E+00

1.00E-01

1.00E-03

 

   15% mature trophozoites

    
 

   15% gametocytes

    

P. malariae 1

Parasitaemia 0.06%

    
 

   25% growing trophs

ND

1.00E+00

1.00E+00

1.00E-04

 

   57.1% mature trophs

    
 

   3.6% mature schizonts

    
 

   7.1% immature schizonts

    
 

   7.1% gametocytes

    

P. malariae 2

Parasitaemia 0.10%

    
 

   11.1% rings

ND

1.00E+00

1.00E+00

1.00E-04

 

   50% growing trophozoites

    
 

   13.9% mature trophozoites

    
 

   2.8% immature schizonts

    
 

   5.6% mature schizonts

    
 

   16.7% gametocytes

    

P. malariae 3

Parasitaemia 0.0614%

    
 

   11.1% rings

ND

1.00E+00

1.00E+00

1.00E-03

 

   44.4% growing trophozoites

    
 

   14.8% immature schzionts

    
 

   11.1% mature trophozoites

    
 

   18.5% gametocytes

    

P. ovale 1

Parasitaemia 0.167%

    
 

   3% rings

ND

undetectable

1.00E+00

1.00E-04

 

   94% growing trophozoites

    
 

   3% mature schizonts

    

P. ovale 2

Parasitaemia 0.219%

    
 

   11.4% rings

ND

1.00E+00

1.00E+00

1.00E-05

 

   85.7% growing trophozoites

    
 

   2.8% gametocytes

    

P. ovale 3

Parasitaemia 0.009%

    
 

   100% growing trophozoites

ND

undetectable

undetectable

1.00E-03

  1. Values reflect the tenfold dilution level from the original sample.
  2. ND- not determined due to lack of unfrozen specimens for these species.