Evaluation of tomato brown rugose fruit virus as a microbial source tracking marker for human sewage in Thailand

Tomato brown rugose fruit virus (ToBRFV) has emerged as a major plant pathogen with the potential to spread through contaminated wastewater, posing risks to agriculture and public health. This study evaluated ToBRFV as a human-specific microbial source tracking (MST) marker in Thailand, comparing it...

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Veröffentlicht in:The Science of the total environment 2025-02, Vol.963, p.178419, Article 178419
Hauptverfasser: Paisantham, Phongsawat, Theplhar, Supitchaya, Srathongneam, Thitima, Sresung, Montakarn, Mongkolsuk, Skorn, Sirikanchana, Kwanrawee
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container_start_page 178419
container_title The Science of the total environment
container_volume 963
creator Paisantham, Phongsawat
Theplhar, Supitchaya
Srathongneam, Thitima
Sresung, Montakarn
Mongkolsuk, Skorn
Sirikanchana, Kwanrawee
description Tomato brown rugose fruit virus (ToBRFV) has emerged as a major plant pathogen with the potential to spread through contaminated wastewater, posing risks to agriculture and public health. This study evaluated ToBRFV as a human-specific microbial source tracking (MST) marker in Thailand, comparing its performance to crAssphage. Using qPCR assays, ToBRFV was detected in 62.5 % of building sewage samples (n = 16) and 100.0 % of wastewater treatment plant (WWTP) influent samples (n = 16). Notably, ToBRFV showed minimal cross-detection in non-human fecal samples (35 pooled samples), collected from cows, pigs, chickens, ducks, and goats, with only one detection in a pig fecal-source sample, demonstrating high specificity to human sewage. Concentrations in WWTP influent were significantly higher (mean: 5.19 ± 5.05; range: 3.96–5.62 log10 copies/100 mL) than in building sewage (mean: 4.36 ± 4.40; range: 2.33–4.85 log10 copies/100 mL) (p 
doi_str_mv 10.1016/j.scitotenv.2025.178419
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This study evaluated ToBRFV as a human-specific microbial source tracking (MST) marker in Thailand, comparing its performance to crAssphage. Using qPCR assays, ToBRFV was detected in 62.5 % of building sewage samples (n = 16) and 100.0 % of wastewater treatment plant (WWTP) influent samples (n = 16). Notably, ToBRFV showed minimal cross-detection in non-human fecal samples (35 pooled samples), collected from cows, pigs, chickens, ducks, and goats, with only one detection in a pig fecal-source sample, demonstrating high specificity to human sewage. Concentrations in WWTP influent were significantly higher (mean: 5.19 ± 5.05; range: 3.96–5.62 log10 copies/100 mL) than in building sewage (mean: 4.36 ± 4.40; range: 2.33–4.85 log10 copies/100 mL) (p &lt; 0.001). ToBRFV concentrations were significantly lower than crAssphage in building sewage but higher in WWTP influents. Additionally, ToBRFV and crAssphage exhibited moderate correlations in both building sewage and WWTP influent samples. These results suggest that ToBRFV could serve as a valuable MST marker for identifying human contamination in water bodies, complementing established markers. While ToBRFV's broader utility across diverse geographic regions remains to be fully validated, this study highlights its potential as a reliable indicator of human sewage in environmental surveillance. [Display omitted] •ToBRFV detected in 62.5 % of building sewage and 100 % of WWTP influents•Minimal cross-detection in non-human fecal samples indicates high specificity.•ToBRFV concentrations were significantly lower than crAssphage in building sewage.•This study highlights ToBRFV's potential as a valuable MST marker for human sewage.</description><identifier>ISSN: 0048-9697</identifier><identifier>ISSN: 1879-1026</identifier><identifier>EISSN: 1879-1026</identifier><identifier>DOI: 10.1016/j.scitotenv.2025.178419</identifier><identifier>PMID: 39824094</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Animals ; Environmental monitoring ; Environmental Monitoring - methods ; Fecal pollution ; Human sewage ; Humans ; Microbial source tracking ; Sewage - virology ; Thailand ; Tomato brown rugose fruit virus ; Wastewater ; Wastewater - microbiology ; Wastewater - virology</subject><ispartof>The Science of the total environment, 2025-02, Vol.963, p.178419, Article 178419</ispartof><rights>2025 Elsevier B.V.</rights><rights>Copyright © 2025 Elsevier B.V. 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subjects Animals
Environmental monitoring
Environmental Monitoring - methods
Fecal pollution
Human sewage
Humans
Microbial source tracking
Sewage - virology
Thailand
Tomato brown rugose fruit virus
Wastewater
Wastewater - microbiology
Wastewater - virology
title Evaluation of tomato brown rugose fruit virus as a microbial source tracking marker for human sewage in Thailand
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