Making waves: Wastewater sludge holds untapped antimicrobial potential

Area of Science:

• Environmental microbiology
• Antimicrobial resistance (AMR) research
• Biotechnology

Background:

• Wastewater treatment plants (WWTPs) are key in AMR dissemination and control.
• Wastewater sludge represents a vast, accessible microbiome shaped by antimicrobials and stressors.
• This environment may harbor undiscovered antimicrobial functions.

Purpose of the Study:

• To propose a dual-function framework for wastewater sludge in AMR stewardship.
• To establish sludge as a resource for surveillance and a source for antimicrobial discovery.
• To outline a containment-first workflow for identifying antimicrobial peptides from sludge.

Main Methods:

• Leveraging advances in metagenomics and machine learning for peptide discovery.
• Implementing an evidence ladder linking sequence data to functional validation.
• Utilizing decision gates for cross-resistance screening and resistance-evolution assays.

Main Results:

• A proposed framework for utilizing wastewater sludge for both AMR surveillance and antimicrobial discovery.
• A workflow emphasizing offline, contained discovery to mitigate risks.
• Recommendations for standardized benchmarks and reporting to enhance research comparability.

Conclusions:

• Wastewater sludge offers a dual role in AMR stewardship: surveillance and antimicrobial discovery.
• A contained, offline discovery approach is crucial for responsible innovation.
• Standardized methods and data sharing are needed for effective AMR stewardship and discovery.