ArticleJournal of physiological anthropology2016
Regional variation in Ascaris lumbricoides and Trichuris trichiura infections by age cohort and sex: effects of market integration among the indigenous Shuar of Amazonian Ecuador.
Article in Journal of physiological anthropology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 30 citations in OpenAlex.
- Tradeoffs between immune function and childhood growth among Amazonian forager-horticulturalists.Proceedings of the National Academy of Sciences of the United States of America · 2018Trial
- Navigating Practical, Political, and Ethical Challenges of Long-Term Human Biology Field Research: The Shuar Health and Life History Project.American journal of human biology : the official journal of the Human Biology Council · 2026Article
- The Shuar Health and Life History Project: Overview at 20 Years and Introduction to the Special Issue.American journal of human biology : the official journal of the Human Biology Council · 2026Article
- Amazonian Shuar testosterone levels are related to parasite infection: immunocompetence handicap hypothesis implications.Evolution, medicine, and public health · 2026Article
- Incidence of Ascaris Lumbricoides Over 20 Years in the Population of the United Mexican States (2003-2022) and Projection Through 2030.Acta parasitologica · 2025Observational
- Soil-Transmitted Helminths and the Intricacies of Immunoregulation: Evidence From Amazonian Ecuador for the Importance of Considering Species-Specific Effects Within the Old Friends Hypothesis.American journal of human biology : the official journal of the Human Biology Council · 2025Article
- Circulating Epstein-Barr Virus Antibody Levels as a Biomarker of Socioecological Adversity in Amazonian Ecuador.American journal of human biology : the official journal of the Human Biology Council · 2025Article
- Prevalence and associated risk factors of intestinal parasites among schoolchildren in Ecuador, with emphasis on the molecular diversity of Giardia duodenalis, Blastocystis sp. and Enterocytozoon bieneusi.PLoS neglected tropical diseases · 2023Article
- Article
- Pathogen disgust sensitivity protects against infection in a high pathogen environment.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Epidemiological insights from a large-scale investigation of intestinal helminths in Medieval Europe.PLoS neglected tropical diseases · 2020Article
- Market integration and soil-transmitted helminth infection among the Shuar of Amazonian Ecuador.PloS one · 2020Article
- High Rates of Exposures to Waterborne Pathogens in Indigenous Communities in the Amazon Region of Ecuador.The American journal of tropical medicine and hygiene · 2019Article
Corrections and comments
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Authors and funding
7 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSoil-transmitted helminth (STH) infection peaks during childhood and varies by sex. The impact of market integration (MI) (increasing production for and consumption from a market-based economy) on these infection patterns, however, is unclear. In this study, STH infection is examined by sex and age among indigenous Shuar inhabiting two regions of Amazonian Ecuador: (1) the modestly market-integrated Upano Valley (UV) and (2) the more traditional Cross-Cutucú (CC) region.
methodsKato-Katz fecal smears were examined for parasite presence and infection intensity. Factorial ANOVAs and post hoc simple effects analyses were performed by sex to compare infection intensity between regions and age categories (infant/child, juvenile/adolescent, adult).
resultsSignificant age and regional differences in Ascaris lumbricoides and Trichuris trichiura infection were detected. Overall, infants/children and juveniles/adolescents displayed higher parasite loads than adults. CC females exhibited higher A. lumbricoides loads than UV females, while the opposite pattern was observed for T. trichiura infection in males.
conclusionsRegional infection patterns varied by sex and parasite species, perhaps due to MI-linked environmental and lifestyle changes. These results have public health implications for the identification of individuals at risk for infection and contribute to ongoing efforts to track changes and alleviate STH infection in indigenous populations undergoing MI.
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