Version 1
: Received: 24 February 2024 / Approved: 26 February 2024 / Online: 26 February 2024 (14:15:14 CET)
How to cite:
Maiga, H.; Gorres, P.J.; Duffy, P.E. DNA Contamination during Extraction of Dried Blood Spots from Whatman Filter Paper. Preprints2024, 2024021443. https://doi.org/10.20944/preprints202402.1443.v1
Maiga, H.; Gorres, P.J.; Duffy, P.E. DNA Contamination during Extraction of Dried Blood Spots from Whatman Filter Paper. Preprints 2024, 2024021443. https://doi.org/10.20944/preprints202402.1443.v1
Maiga, H.; Gorres, P.J.; Duffy, P.E. DNA Contamination during Extraction of Dried Blood Spots from Whatman Filter Paper. Preprints2024, 2024021443. https://doi.org/10.20944/preprints202402.1443.v1
APA Style
Maiga, H., Gorres, P.J., & Duffy, P.E. (2024). DNA Contamination during Extraction of Dried Blood Spots from Whatman Filter Paper. Preprints. https://doi.org/10.20944/preprints202402.1443.v1
Chicago/Turabian Style
Maiga, H., Patrict J Gorres and Patrick E Duffy. 2024 "DNA Contamination during Extraction of Dried Blood Spots from Whatman Filter Paper" Preprints. https://doi.org/10.20944/preprints202402.1443.v1
Abstract
Dried blood spot (DBS) testing on confetti is one of the most common methods used to collect and extract DNA from field samples for molecular epidemiology of malaria studies. Here, we investigated whether ethanol or other solutions used to clean scissors are a source of sample contamination. DBS were prepared from 3 drops of blood from two Plasmodium falciparum cultures spotted on confetti, and 3 solutions (water, ethanol and DNase) were used to clean scissors between spots during DNA extraction. For each cleaning solution, two blank confetti were used as negative controls. Samples were analyzed by PCR-based genotyping of merozoite surface proteins 1 & 2 (msp-1 and msp-2), and P. falciparum chloroquine resistance transporter (Pfcrt). A total of 15 samples were analyzed. Based on msp-1 and msp-2 amplification, P. falciparum was detected on blank confetti when scissors were washed with ethanol. Based on Pfcrt amplification, DNA of P. falciparum was detected on blank confetti when scissors were cleaned with ethanol or water. No P. falciparum genes were detected on blank confetti when scissors were cleaned with DNase. Scissors cleaned with DNase prevented cross-contamination between samples during processing of dried blood spots, whereas ethanol (which is commonly used) fails to avert cross-contamination.
Keywords
DNA extraction; Scissors; DBS; DNase
Subject
Biology and Life Sciences, Parasitology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
