Fine-scale GPS tracking to quantify human movement patterns and exposure to leptospires in the urban slum environment

PLoS Neglected Tropical Diseases
Katharine A OwersAlbert Ko

Abstract

Human movement is likely an important risk factor for environmentally-transmitted pathogens. While epidemiologic studies have traditionally focused on household risk factors, individual movement data could provide critical additional information about risk of exposure to such pathogens. We conducted global positioning system (GPS) tracking of urban slum residents to quantify their fine-scale movement patterns and evaluate their exposures to environmental sources of leptospirosis transmission. We recruited participants from an ongoing cohort study in an urban slum in Brazil and tracked them for 24 hours at 30-second intervals. Among 172 subjects asked to participate in this cross-sectional study, 130 agreed to participate and 109 had good quality data and were included in analyses. The majority of recorded locations were near participant residences (87.7% within 50 meters of the house), regardless of age or gender. Similarly, exposure to environmental sources of leptospirosis transmission did not vary by age or gender. However, males, who have higher infection rates, visited a significantly larger area during the 24-hour period than did females (34,549m2 versus 22,733m2, p = 0.005). Four male participants had serologic evidence ...Continue Reading

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Citations

Dec 25, 2019·Malaria Journal·Carlos A GuerraDavid L Smith
Apr 1, 2021·PLoS Neglected Tropical Diseases·Hussein KhalilFederico Costa

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R
QGIS
REDCap

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