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Table 1 Guanidine thiocyanate (with alcohol) outperforms guanidine hydrochloride for extraction of DNA from dried blood spots

From: An improved nucleic acid extraction method from dried blood spots for amplification of Plasmodium falciparum kelch13 for detection of artemisinin resistance

 

3M GuSCN

3M GHCl

Alcohol

0%

16.7% ISOH

16.7% ETOH

0%

16.7% ISOH

16.7% ETOH

Average Ct for Pf 18S rDNA (± SD)

Undetectable

29.2 (± .1)

29.3 (± .2)

Undetectable

Undetectable

Undetectable

Average Ct for human actin (± SD)

28.8 (± .2)

27.3 (± .3)

27.6 (± .3)

29.6 (± .4)

Undetectable

Undetectable

  1. Experiments done with samples at parasite density of 2000 parasites/mL
  2. Pf, Plasmodium falciparum; GuSCN, guanidine thiocyanate; GHCl, guanidine hydrochloride; ISOH, isopropanol; ETOH, ethanol; SD, standard deviation; Ct, cycle threshold