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Contribution of wastewater irrigated vegetables to the prevalence of soil-transmitted helminth infection among female farmers in Addis Ababa, Ethiopia

Lookup NU author(s): Professor Michaela Goodson, Professor Claire Walsh

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© The Author(s) 2024.Background: Untreated or inadequately treated wastewater carrying human feces can host helminth eggs and larvae, contaminating the soil and plants that are irrigated with it. In Addis Ababa, farmers use untreated wastewater to grow vegetables; however, there are little data currently available published on vegetables' contribution to the prevalence of helminth among female farmers along the Akaki River, in Addis Ababa, Ethiopia. Methods: A cross-sectional study was conducted in Addis Ababa City in February 2022. A stratified random sampling method was used to sample farming households. The sample size for each district was determined by a proportional allocation to the total number of households in the area. Two hundred and fifty-two composite vegetable samples and 101 farmers’ stool samples were collected and analyzed for helminth prevalence. Data on socio-demographics were collected by trained data collators using a structured questionnaire. Kato-Katz concentration was used to detect STH from a stool sample. Stata version 14.0 was used to process the data. Poisson regression was used to identify the association between STH prevalence in the vegetable and the farm's stool. Results: Helminths were found in 67.5% of vegetables sampled and 20.8% of female farmers' stools. Ascaris lumbricoides eggs (vegetable 48.4% and stool 9.9%) were identified in all analyzed samples. Hookworm eggs (vegetable 13.1% and stool 8.9%) and Trichuris trichiura eggs (vegetable 5.9% and stool 2%) were also isolated. The total number of helminth eggs present in wastewater-irrigated vegetables and female farmers’ stool had a positive association (p < 0.05) with a regression coefficient of 1.92 (95% CI = 1.56–2.28). Conclusions: The study found a significant prevalence of helminth infections, particularly Ascaris lumbricoides, in stool and vegetable samples irrigated with wastewater. A clear association was found between vegetable production and a higher prevalence of helminth infections among female farmers. Therefore, it is important to ensure that farmers are educated in the importance of food washing and sanitation/hygiene practices when using wastewater irrigation for vegetable crops. Graphical Abstract: (Figure presented.)


Publication metadata

Author(s): Gurmassa BK, Gari SR, Solomon ET, Goodson ML, Walsh CL, Dessie BK, Alemu BM

Publication type: Article

Publication status: Published

Journal: Tropical Medicine and Health

Year: 2024

Volume: 52

Issue: 1

Print publication date: 01/12/2024

Online publication date: 06/06/2024

Acceptance date: 18/05/2024

Date deposited: 17/06/2024

ISSN (print): 1348-8945

ISSN (electronic): 1349-4147

Publisher: BioMed Central Ltd

URL: https://doi.org/10.1186/s41182-024-00604-5

DOI: 10.1186/s41182-024-00604-5


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Funding

Funder referenceFunder name
e UK Research and Innovation’s Global Challenges Research Fund (GCRF), Grant no.: ES/S008179/1

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