Publications by authors named "S Zobrist"

Background: The emergence of -deleted parasites threatens histidine-rich protein 2 (HRP2)-based malaria rapid diagnostic test (RDT) performance. RDTs targeting () lactate dehydrogenase (LDH) may address current product limitations and improve case management.

Objectives: To evaluate the performance and usability of three LDH-based RDTs in febrile patients.

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Introduction: Screening for G6PD deficiency can inform disease management including malaria. Treatment with the antimalarial drugs primaquine and tafenoquine can be guided by point-of-care testing for G6PD deficiency.

Methods And Findings: Data from similar clinical studies evaluating the performance of the STANDARD G6PD Test (SD Biosensor, South Korea) conducted in Bangladesh, Brazil, Ethiopia, India, Thailand, the United Kingdom, and the United States were pooled.

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Article Synopsis
  • The study investigates the effectiveness of rapid diagnostic tests (RDTs) in detecting N-antigen levels and viral load in various specimen types among individuals exposed to confirmed COVID-19 cases.
  • The results show that antigen concentration correlates with viral load within the same specimen type but differs across types, with symptomatic individuals showing higher antigen levels.
  • Saliva samples had lower antigen concentrations than nasal swabs, suggesting that saliva-based RDTs need enhanced sensitivity to match the performance of nasal tests.
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Background: Point-of-care and decentralized testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is critical to inform public health responses. Performance evaluations in priority use cases such as contact tracing can highlight trade-offs in test selection and testing strategies.

Methods: A prospective diagnostic accuracy study was conducted among close contacts of coronavirus disease 2019 (COVID-19) cases in Brazil.

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Certain clinical indications and treatments such as the use of rasburicase in cancer therapy and 8-aminoquinolines for Plasmodium vivax malaria treatment would benefit from a point-of-care test for glucose-6-phosphate dehydrogenase (G6PD) deficiency. Three studies were conducted to evaluate the performance of one such test: the STANDARD™ G6PD Test (SD BIOSENSOR, South Korea). First, biological interference on the test performance was evaluated in specimens with common blood disorders, including high white blood cell (WBC) counts.

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