Survey on collection, concentration, and assay methods for environmental surveillance of S. Typhi.

(DOCX)</p

Total and operational costs per sample.

Table A in S3 Text. Total and operational costs per sample (modeled). (DOCX)</p

Cost model components, categorized by type and color-coded by function.

Detailed descriptions and formulas can be found in Table A in S3 Text. Operational costs include labor, truck operations and maintenance, equipment maintenance, and consumables.</p