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"DNA extraction"

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An Alternative Method for Extracting Plasmodium DNA from EDTA Whole Blood for Malaria Diagnosis
Krongkaew Seesui, Kanokwan Imtawil, Phimphakon Chanetmahun, Porntip Laummaunwai, Thidarut Boonmars
Korean J Parasitol 2018;56(1):25-32.
Published online February 28, 2018
DOI: https://doi.org/10.3347/kjp.2018.56.1.25
Molecular techniques have been introduced for malaria diagnosis because they offer greater sensitivity and specificity than microscopic examinations. Therefore, DNA isolation methods have been developed for easy preparation and cost effectiveness. The present study described a simple protocol for Plasmodium DNA isolation from EDTA-whole blood. This study demonstrated that after heating infected blood samples with Tris?EDTA buffer and proteinase K solution, without isolation and purification steps, the supernatant can be used as a DNA template for amplification by PCR. The sensitivity of the extracted DNA of Plasmodium falciparum and Plasmodium vivax was separately analyzed by both PCR and semi-nested PCR (Sn-PCR). The results revealed that for PCR the limit of detection was 40 parasites/μl for P. falciparum and 35.2 parasites/μl for P. vivax, whereas for Sn-PCR the limit of detection was 1.6 parasites/μl for P. falciparum and 1.4 parasites/μl for P. vivax. This new method was then verified by DNA extraction of whole blood from 11 asymptomatic Myanmar migrant workers and analyzed by Sn-PCR. The results revealed that DNA can be extracted from all samples, and there were 2 positive samples for Plasmodium (P. falciparum and P. vivax). Therefore, the protocol can be an alternative method for DNA extraction in laboratories with limited resources and a lack of trained technicians for malaria diagnosis. In addition, this protocol can be applied for subclinical cases, and this will be helpful for epidemiology and control.

Citations

Citations to this article as recorded by  Crossref logo
  • Evaluation of A Simple DNA Extraction Method and Its Combination with Loop-Mediated Isothermal Amplification Assays for Rapid Plasmodium knowlesi Diagnosis
    Meng-Yee Lai, Mohd Hafizi Abdul Hamid, Jenarun Jelip, Rose Nani Mudin, Yee-Ling Lau
    Tropical Medicine and Infectious Disease.2023; 8(8): 389.     CrossRef
  • Liquid Biopsy for Promising Non-invasive Diagnostic Biomarkers in Parasitic Infections
    Eylem Akdur Ozturk, Ayse Caner
    Acta Parasitologica.2022; 67(1): 1.     CrossRef
  • Comparison of six methods for Loa loa genomic DNA extraction
    Roland Dieki, Elsa-Rush Eyang-Assengone, Patrice Makouloutou-Nzassi, Félicien Bangueboussa, Edouard Nsi Emvo, Jean Paul Akue, Ricardo Santos
    PLOS ONE.2022; 17(3): e0265582.     CrossRef
  • Protein abundance and folding rather than the redox state of Kelch13 determine the artemisinin susceptibility of Plasmodium falciparum
    Robin Schumann, Eileen Bischoff, Severina Klaus, Sophie Möhring, Julia Flock, Sandro Keller, Kim Remans, Markus Ganter, Marcel Deponte
    Redox Biology.2021; 48: 102177.     CrossRef
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DNA Extraction from Protozoan Oocysts/Cysts in Feces for Diagnostic PCR
Yousry Hawash
Korean J Parasitol 2014;52(3):263-271.
Published online June 26, 2014
DOI: https://doi.org/10.3347/kjp.2014.52.3.263

PCR detection of intestinal protozoa is often restrained by a poor DNA recovery or by inhibitors present in feces. The need for an extraction protocol that can overcome these obstacles is therefore clear. QIAamp® DNA Stool Mini Kit (Qiagen) was evaluated for its ability to recover DNA from oocysts/cysts directly from feces. Twenty-five Giardia-positive, 15 Cryptosporidium-positive, 15 Entamoeba histolytica-positive, and 45 protozoa-free samples were processed as control by microscopy and immunoassay tests. DNA extracts were amplified using 3 sets of published primers. Following the manufacturer's protocol, the kit showed sensitivity and specificity of 100% towards Giardia and Entamoeba. However, for Cryptosporidium, the sensitivity and specificity were 60% (9/15) and 100%, respectively. A series of optimization experiments involving various steps of the kit's protocol were conducted using Cryptosporidium-positive samples. The best DNA recoveries were gained by raising the lysis temperature to the boiling point for 10 min and the incubation time of the InhibitEX tablet to 5 min. Also, using a pre-cooled ethanol for nucleic acid precipitation and small elution volume (50-100 ?l) were valuable. The sensitivity of the amended protocol to Cryptosporidium was raised to 100%. Cryptosporidium DNA was successfully amplified by either the first or the second primer set. When applied on parasite-free feces spiked with variable oocysts/cysts counts, ? 2 oocysts/cysts were theoretically enough for detection by PCR. To conclude, the Qiagen kit with the amended protocol was proved to be suitable for protozoan DNA extraction directly from feces and support PCR diagnosis.

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  • 14,077 View
  • 228 Download
  • 43 Web of Science
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Imported Malaria in United Arab Emirates: Evaluation of a New DNA Extraction Technique Using Nested PCR
Doaa M. Sultan, Marwa M. Khalil, Ahmed S. Abdouh, Wafaa F. Doleh, Abdul Aziz M. Al Muthanna
Korean J Parasitol 2009;47(3):227-233.
Published online August 28, 2009
DOI: https://doi.org/10.3347/kjp.2009.47.3.227

Local malaria transmission in the United Arab Emirates (UAE) came to an end in 1997. Nevertheless, UAE has been subjected to substantial importation of malaria cases from abroad, concerning both UAE nationals and immigrants from malarious countries with a total number of 2,119 cases in 2007. To evaluate a new DNA extraction technique using nested PCR, blood samples were collected from 132 individuals who presented to Infectious Diseases Department in Rashid Hospital, Dubai, and Central Department of Malaria Control with fever and persistent headache. Giemsa-stained blood films and ELISA test for malaria antibodies were carried out for detection of Plasmodium infection. Plasmodium infections were identified with the genus-specific primer set and species differentiation using nested PCR. A rapid procedure for diagnosis of malaria infections directly from dried blood spots using for the first time DNA extract from FTA Elute cards was evaluated in contrast to extraction techniques using FTA classic cards and rapid boiling technique. Our new simple technique for DNA extraction using FTA Elute cards was very sensitive giving a sensitivity of 100% compared to 94% using FTA classic cards and 62% in the rapid boiling technique. No complex preparation of blood samples was required prior to the amplification. The production cost of DNA isolation in our PCR assay was much less in comparable to that of other DNA extraction protocols. The nested PCR detected plasmodial infection and could differentiate P. falciparum from P. vivax, and also detected the mixed infection.

Citations

Citations to this article as recorded by  Crossref logo
  • Nucleic acid purification from dried blood spot on FTA Elute Card provides template for polymerase chain reaction for highly sensitive Plasmodium detection
    Muneaki Hashimoto, Mika Bando, Jun-ichi Kido, Kazumichi Yokota, Toshihiro Mita, Kazuaki Kajimoto, Masatoshi Kataoka
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