Table 1.
Search strategy used for the MEDLINE database.
| Number | Searcha | Results, n |
| 1 | Antibiotic residue$.mp. | 1052 |
| 2 | Antibiotic resistan$ bacteria.mp. | 3338 |
| 3 | antibiotic resistance gene$.mp. | 5460 |
| 4 | antimicrobial resistan$ organism$.mp. | 161 |
| 5 | antimicrobial resistan$ pathogen$.mp. | 267 |
| 6 | ARB selection.mp. | 2 |
| 7 | Anti-Microbial Agent$.mp. | 399 |
| 8 | Wastewater treat$.mp. | 23,724 |
| 9 | Graywater treat$.mp. | 9 |
| 10 | Greywater treat$.mp. | 92 |
| 11 | wastewater treat$ plant$.mp. | 10,628 |
| 12 | wastewater treatment method$.mp. | 105 |
| 13 | conventional wastewater treatment process$.mp. | 69 |
| 14 | new wastewater treatment process$.mp. | 11 |
| 15 | effluent.mp. | 29,387 |
| 16 | influent.mp. | 7430 |
| 17 | Antimicrobial resistance gene$.mp. | 1566 |
| 18 | antimicrobial resistan$.mp. | 25,483 |
| 19 | antibiotic resistan$.mp. | 45,671 |
| 20 | plasmid$.mp. | 184,995 |
| 21 | Sewage treatment.mp. | 3861 |
| 22 | 1 or 2 or 3 or 4 or 5 or 6 or 7 or 17 or 18 or 19 or 20 | 245,158 |
| 23 | 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 21 | 52,791 |
| 24 | 22 and 23 | 1397 |
| 25 | limit 24 to yr=“2001 -Current” | 1324 |
| 26 | limit 25 to english language | 1296 |
aIn the search, mp=title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, organism supplementary concept word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, and synonyms.