Table 1 Selection conditions.

From: Limited dissemination of the wastewater treatment plant core resistome

Antibiotic

Concentration (μgml−1)

Code

Class

Number of colonies

Ampicillin

16

AMP

β-Lactam/penicillin

660

Amoxicillin

16

AMX

β-Lactam/penicillin

500

Carbenicillin

64

CAR

β-Lactam/penicillin

1,100

Piperacillin

16

PIP

β-Lactam/penicillin

800

Ceftazidime

1

CTZ

β-Lactam/cephalosporin

350

Amikacin

16

AMK

Aminoglycoside

220

Gentamicin

8

GEN

Aminoglycoside

40

Spectinomycin

32

SPC

Aminoglycoside

330

Azithromycin

16

AZI

Macrolide

120

Erythromycin

100

ERY

Macrolide

200

Tetracycline

4

TET

Tetracycline

100

Chloramphenicol

6

CAM

Phenicol

30

Rifampicin

16

RIF

Rifamycin

210

Trimethoprim

4

TMP

Benzylpyrimidine

2,000

Sulfamethoxazole/trimethoprim

32:4

SXT

Sulfonamide/dihydrofolate reductase inhibitor

1,500

Total

   

8,160

  1. AMK, amikacin; AMP, ampicillin; AMX, amoxicillin; AZI, azithromycin; CAM, chloramphenicol; CAR, carbenicillin; CTZ, ceftazidime; ERY, erythromycin; GEN, gentamicin; PIP, piperacillin; RIF, rifampicin; SPC, spectinomycin; SXT, sulfamethoxazole/trimethoprim; TET, tetracycline; TMP, trimethoprim.