Surveillance of vector-borne pathogens under imperfect detection: lessons from Chagas disease risk (mis)measurement.

Autor: Minuzzi-Souza TTC; Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Nitz N; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Cuba CAC; Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Hagström L; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Hecht MM; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Santana C; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Ribeiro M; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Vital TE; Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Santalucia M; Laboratório Central de Saúde Pública, Secretaria Estadual de Saúde de Goiás, Goiânia, 74853-120, Brazil., Knox M; Diretoria de Vigilância Ambiental, Secretaria de Saúde do Distrito Federal, Brasília, 70086-900, Brazil., Obara MT; Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil., Abad-Franch F; Grupo Triatomíneos, Instituto René Rachou - Fiocruz, Belo Horizonte, 30190-009, Brazil. fernando.abad@minas.fiocruz.br., Gurgel-Gonçalves R; Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, 72910-900, Brazil. rgurgel@unb.br.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2018 Jan 09; Vol. 8 (1), pp. 151. Date of Electronic Publication: 2018 Jan 09.
DOI: 10.1038/s41598-017-18532-2
Abstrakt: Vector-borne pathogens threaten human health worldwide. Despite their critical role in disease prevention, routine surveillance systems often rely on low-complexity pathogen detection tests of uncertain accuracy. In Chagas disease surveillance, optical microscopy (OM) is routinely used for detecting Trypanosoma cruzi in its vectors. Here, we use replicate T. cruzi detection data and hierarchical site-occupancy models to assess the reliability of OM-based T. cruzi surveillance while explicitly accounting for false-negative and false-positive results. We investigated 841 triatomines with OM slides (1194 fresh, 1192 Giemsa-stained) plus conventional (cPCR, 841 assays) and quantitative PCR (qPCR, 1682 assays). Detections were considered unambiguous only when parasitologists unmistakably identified T. cruzi in Giemsa-stained slides. qPCR was >99% sensitive and specific, whereas cPCR was ~100% specific but only ~55% sensitive. In routine surveillance, examination of a single OM slide per vector missed ~50-75% of infections and wrongly scored as infected ~7% of the bugs. qPCR-based and model-based infection frequency estimates were nearly three times higher, on average, than OM-based indices. We conclude that the risk of vector-borne Chagas disease may be substantially higher than routine surveillance data suggest. The hierarchical modelling approach we illustrate can help enhance vector-borne disease surveillance systems when pathogen detection is imperfect.
Databáze: MEDLINE