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Development and evaluation of PlasmoPod: A cartridge-based nucleic acid amplification test for rapid malaria diagnosis and surveillance.
Bechtold, Philippe; Wagner, Philipp; Hosch, Salome; Gregorini, Michele; Stark, Wendelin J; Gody, Jean Chrysostome; Kodia-Lenguetama, Edwige Régina; Pagonendji, Marilou Sonia; Donfack, Olivier Tresor; Phiri, Wonder P; García, Guillermo A; Nsanzanbana, Christian; Daubenberger, Claudia A; Schindler, Tobias; Vickos, Ulrich.
Afiliación
  • Bechtold P; Institute for Chemical and Bioengineering, ETH Zurich, Zuerich, Switzerland.
  • Wagner P; Diaxxo AG, Zuerich, Switzerland.
  • Hosch S; Swiss Tropical and Public Health Institute, Basel, Switzerland.
  • Gregorini M; University of Basel, Basel, Switzerland.
  • Stark WJ; Swiss Tropical and Public Health Institute, Basel, Switzerland.
  • Gody JC; University of Basel, Basel, Switzerland.
  • Kodia-Lenguetama ER; Institute for Chemical and Bioengineering, ETH Zurich, Zuerich, Switzerland.
  • Pagonendji MS; Diaxxo AG, Zuerich, Switzerland.
  • Donfack OT; Institute for Chemical and Bioengineering, ETH Zurich, Zuerich, Switzerland.
  • Phiri WP; Diaxxo AG, Zuerich, Switzerland.
  • García GA; Paediatric Hospital and University Complex of Bangui, Bangui, Central African Republic.
  • Nsanzanbana C; National Blood Transfusion Centre, Ministry of Health, Bangui, Central African Republic.
  • Daubenberger CA; Laboratory of Parasitology, Institute Pasteur of Bangui, Bangui, Central African Republic.
  • Schindler T; MCD Global Health, Malabo, Equatorial Guinea.
  • Vickos U; MCD Global Health, Malabo, Equatorial Guinea.
PLOS Glob Public Health ; 3(9): e0001516, 2023.
Article en En | MEDLINE | ID: mdl-37756280
Malaria surveillance is hampered by the widespread use of diagnostic tests with low sensitivity. Adequate molecular malaria diagnostics are often only available in centralized laboratories. PlasmoPod is a novel cartridge-based nucleic acid amplification test for rapid, sensitive, and quantitative detection of malaria parasites. PlasmoPod is based on reverse-transcription quantitative polymerase chain reaction (RT-qPCR) of the highly abundant Plasmodium spp. 18S ribosomal RNA/DNA biomarker and is run on a portable qPCR instrument which allows diagnosis in less than 30 minutes. Our analytical performance evaluation indicates that a limit-of-detection as low as 0.02 parasites/µL can be achieved and no cross-reactivity with other pathogens common in malaria endemic regions was observed. In a cohort of 102 asymptomatic individuals from Bioko Island with low malaria parasite densities, PlasmoPod accurately detected 83 cases, resulting in an overall detection rate of 81.4%. Notably, there was a strong correlation between the Cq values obtained from the reference RT-qPCR assay and those obtained from PlasmoPod. In an independent cohort, using dried blood spots from malaria symptomatic children living in the Central African Republic, we demonstrated that PlasmoPod outperforms malaria rapid diagnostic tests based on the PfHRP2 and panLDH antigens as well as thick blood smear microscopy. Our data suggest that this 30-minute sample-to-result RT-qPCR procedure is likely to achieve a diagnostic performance comparable to a standard laboratory-based RT-qPCR setup. We believe that the PlasmoPod rapid NAAT could enable widespread accessibility of high-quality and cost-effective molecular malaria surveillance data through decentralization of testing and surveillance activities, especially in elimination settings.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies / Screening_studies Idioma: En Revista: PLOS Glob Public Health Año: 2023 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies / Screening_studies Idioma: En Revista: PLOS Glob Public Health Año: 2023 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos