Optimization of DNA extraction from field-collected mammalian whole blood on filter paper for Trypanosoma cruzi (Chagas disease) detection

Bonnie E. Gulas-Wroblewski, Rebecca B. Kairis, Rodion Viktorovich Gorchakov, Anna Wheless, Kristy O. Murray

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Blood filter paper strips are cost-effective materials used to store body fluid specimens under challenging field conditions, extending the reach of zoonotic pathogen surveillance and research. We describe an optimized procedure for the extraction of parasite DNA from whole blood (WB) stored on Type I Advantec Nobuto strips from both experimentally spiked and field-collected specimens from canine and skunks, respectively. When comparing two commercial kits for extraction, Qiagen’s DNeasy Blood & Tissue Kit performed best for the detection of parasite DNA by PCR from Trypanosoma cruzi-spiked canine WB samples on Nobuto strips. To further optimize recovery of β-actin from field-collected skunk WB archived on Nobuto strips, we modified the extraction procedures for the Qiagen kit with a 90 °C incubation step and extended incubation post-addition of proteinase K, a method subsequently employed to identify a T. cruzi infection in one of the skunks. Using this optimized extraction method can efficaciously increase the accuracy and precision of future molecular epidemiologic investigations targeting neglected tropical diseases in field-collected WB specimens on filter strips.
    Original languageEnglish (US)
    Pages (from-to)1040
    JournalPathogens
    Volume10
    Issue number8
    DOIs
    StatePublished - Aug 17 2021

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