Prevalence and Risk Analysis of Human Geohelminths in Rural Communities of Ilalo, Ecuador
Journal
Parasitologia
ISSN
2673-6772
Date Issued
2026-02-02
Author(s)
Fernando Pazmiño
Gissela García
Karla Novoa
Stefan Michael Geiger
Abstract
Soil-transmitted helminthiases (STH) represent the most prevalent helminth infections worldwide and are closely associated with inadequate sanitation and poverty. During 2020 and 2021, a significant information gap emerged as a consequence of the SARS-CoV-2 pandemic. Therefore, the objective of this study was to provide an updated post-pandemic overview by estimating the prevalence of STH, identifying the etiological agents involved, and analyzing the risk factors associated with these infections.
The study was conducted in Ilaló, Pichincha, Ecuador, where a total of 320 individuals were examined using three diagnostic methods: Kato-Katz, McMaster, and Mini-FLOTAC. Of these, 73 participants tested positive (22.81%, 95% CI: 22.3–23.4).
The most frequently identified parasite was Ascaris lumbricoides (74.73%, 95% CI: 73.7–75.8). The main risk factors identified were pig farming (OR: 4.16; 95% CI: 2.34–7.42) and vegetable and fruit cultivation (OR: 11.66; 95% CI: 4.32–41.08). These findings provide relevant epidemiological data on STH in the region, demonstrating a reduction in infection prevalence likely associated with improved prevention and control measures implemented during the COVID-19 pandemic.
The study was conducted in Ilaló, Pichincha, Ecuador, where a total of 320 individuals were examined using three diagnostic methods: Kato-Katz, McMaster, and Mini-FLOTAC. Of these, 73 participants tested positive (22.81%, 95% CI: 22.3–23.4).
The most frequently identified parasite was Ascaris lumbricoides (74.73%, 95% CI: 73.7–75.8). The main risk factors identified were pig farming (OR: 4.16; 95% CI: 2.34–7.42) and vegetable and fruit cultivation (OR: 11.66; 95% CI: 4.32–41.08). These findings provide relevant epidemiological data on STH in the region, demonstrating a reduction in infection prevalence likely associated with improved prevention and control measures implemented during the COVID-19 pandemic.