Enhanced control of sulfonamide resistance genes and host bacteria during thermophilic aerobic composting of cow manure

Traditional composting has already shown a certain effect in eliminating antibiotic residues, antibiotic-resistant bacteria (ARBs), and antibiotic resistance genes (ARGs). It is worth noting that the rebounding of ARGs and the succession of the bacterial community during conventional aerobic compost...

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Bibliographic Details
Published in:Environmental pollution (1987) 2021-04, Vol.275, p.116587-116587, Article 116587
Main Authors: Sardar, Muhammad Fahad, Zhu, Changxiong, Geng, Bing, Huang, Yali, Abbasi, Bilawal, Zhang, Zhiguo, Song, Tingting, Li, Hongna
Format: Article
Language:English
Subjects:
Angiotensin Receptor Antagonists
Angiotensin-Converting Enzyme Inhibitors
Animals
Anti-Bacterial Agents
Bacteria - genetics
Cattle
Composting
Genes, Bacterial
Manure
Potential carriers
Rebounding
Sulfamethoxazole
Sulfonamide resistance genes
Sulfonamides
Thermophilic temperature
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Summary:Traditional composting has already shown a certain effect in eliminating antibiotic residues, antibiotic-resistant bacteria (ARBs), and antibiotic resistance genes (ARGs). It is worth noting that the rebounding of ARGs and the succession of the bacterial community during conventional aerobic composting are still serious threats. Considering the probable risk, improved and adaptable technologies are urgently needed to control antibiotic resistance efficiently. This study monitored how thermophilic aerobic composting affected the ARGs, as well as the bacterial diversity during the composting of cow manure spiked with sulfamethoxazole (SMX) at different concentrations. Results showed that the degradation of SMX was enhanced during thermophilic aerobic composting (control > SMX25 > SMX50 > SMX100) and was no longer detected after 20 days of composting. High temperature or heat significantly stimulated the rebounding of certain genes. After 35 days, the abundance of detected genes (sul2, sulA, dfrA7, and dfrA1) significantly decreased (p 
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2021.116587