Table 1 Bacterial strains and features

Escherichia coli

ATCC 8739 and ATCC 10536

Reference strains

 AG100

Wild-type E. coli K-12

Viveiros et al. (2005)

 AG100ATet

ΔacrAB mutant of AG100; TET^R owing to acrF gene markedly overexpressed

Elkins and Mullis (2007)

 AG102

AG100 over-expressing AcrAB pump

Enterobacter aerogenes

ATCC 13048

Reference strain

EA-CM64

CHLR variant obtained from

Ghisalberti et al. (2005)

EA3

ATCC 13048 overexpressing AcrAB pump

Pradel and Pagès (2002)

Clinical MDR isolate exhibiting energy-dependent

Norfloxacin and chloramphenicol efflux with KAN^R AMP^R

NAL^R STR^R TET^R

EA27

Clinical MDR isolate exhibiting

Energy-dependent NOR and

CHL efflux; KAN^R AMP^R NAL^R

STR^R TET^R

EA289

KAN-sensitive derivative of EA27

EA294

EA289 acrA::KAN^R

EA289

EA289 tolC::KAN^R

Klebsiella pneumoniae

ATCC 11296

Reference strain

Kp55

Clinical MDR isolate, TET^R

Chevalier et al. (2000)

Kp63

AMP^R ATM^R CEF^R

Clinical MDR isolate, TET^R CHL^R

AMP^R ATM^R

Pseudomonas aeruginosa

PA01

Reference strain

PA124

MDR clinical isolate

Lorenzi et al. (2009)

Staphyloccocus aureus

ATCC1026

Reference strain

SA3

Clinical Laboratory isolate, sensitive to methicilin

SA4

SA11

SA12

Clinical laboratory isolate, MET^R

MRSA 3

Dzoyem et al. (2013)

MRSA 4

MRSA 6

MRSA 8