Insights into antibiotic resistance-related changes in microbial communities, resistome and mobilome in paddy irrigated with reclaimed wastewater

Yan, Qing; Xu, Yang; Zhong, Zhengzheng; Xu, Yuanmei; Lin, Xiaoyan; Cao, Zhaoyun; Feng, Guozhong

doi:10.1016/j.scitotenv.2023.165672

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…The absolute abundances of ARGs exhibited a 4-order-of-magnitude variation, ranging from 2.7 × 10 5 to 5.0 × 10 9 copies g –1 sediment (Figure b). The ARGs in the OLS LP were highly enriched with an average of 2.5 × 10 9 copies g –1 sediment, and the OLS AI also showed significantly higher abundance (mean 5.6 × 10 7 copies g –1 sediment, p < 0.05) than NOLS FP (Figures d and S7), comparable to those in estuary sediments along the coast of China, pig farms, and paddy . However, the NOLS FP and NOLS MP showed much lower ARG abundances.…”

Section: Resultsmentioning

confidence: 80%

“…A much higher detection frequency for ARGs occurred in the OLS LP (46.08%) and OLS AI (10.32%) compared with the NOLS MP (2.95%) and NOLS FP (2.69%). Compared with the OLS AI , the OLS LP was strongly subjected to penguin guano input. , Hence, the detection frequency in the OLS LP was significantly higher ( p < 0.05) than that in the OLS AI , even slightly higher than that in pig farms, sewage, and river water samples (Figure S1). Furthermore, the detection frequency in the NOLS was similar to that in the Antarctic soils in proximity to research stations .…”

Section: Resultsmentioning

confidence: 97%

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Penguin-Driven Dissemination and High Enrichment of Antibiotic Resistance Genes in Lake Sediments across Antarctica

Zhou,

Zhu,

Song

et al. 2024

Environ. Sci. Technol.

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Numerous penguins can propagate pathogens with antibiotic resistance genes (ARGs) into Antarctica. However, the effects of penguin dissemination on the lake ARGs still have received little attention via guano deposition. Here, we have profiled ARGs in ornithogenic sediments subject to penguin guano (OLS) and nonornithogenic sediments (NOLS) from 16 lakes across Antarctica. A total of 191 ARGs were detected in all sediment samples, with a much higher abundance and diversity in OLS than in NOLS. Surprisingly, highly diverse and abundant ARGs were found in the OLS with a detection frequency of >40% and an absolute abundance of (2.34 × 10 9 )−(4.98 × 10 9 ) copies g −1 , comparable to those in coastal estuarine sediments and pig farms. The strong correlations of identified resistance genes with penguin guano input amount, environmental factors, mobile genetic elements, and bacterial community, in conjunction with network and redundancy analyses, all indicated that penguins were responsible for the dissemination and high enrichment of ARGs in lake sediments via the guano deposition, which might greatly outweigh local human-activity effects. Our results revealed that ARGs could be carried into lakes across the Antarctica through penguin migration, food chains, and guano deposition, which were closely connected with the widespread pollution of ARGs at the global scale.

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Section: Resultsmentioning

confidence: 80%