Antibiotic Susceptibility, Clonality, and Molecular Characterization of Carbapenem-Resistant Clinical Isolates of Acinetobacter baumannii from Washington DC

Table 1

Antibiotic susceptibility profiles of Acinetobacter baumannii isolates.

Isolate

Aminoglycosides

Carbapenems

Fluoroquinolones

Extended-spectrum cephalosporins

Folate pathway inhibitors

Penicillin

β-Lactam/β-lactamase inhibitors combinations

Tetracyclines

GM

TM

IPM

DOR

CIP

LEV

CTX

CRO

CAZ

FEP

SXT

PIP

TIC

SAM

TGC

TE

A1

S

S

R

R

R

R

R

R

R

R

R

R

R

S

I

R

A2

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

A3

S

S

S

S

S

S

I

I

I

S

S

S

I

S

S

R

A5

S

S

S

S

S

S

I

I

S

S

S

S

S

S

S

S

A7

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

A8

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

A10

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

A11

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

A14

I

S

S

S

R

R

I

I

S

I

R

S

S

S

S

S

B1

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

B2

R

R

R

R

R

R

R

R

R

R

R

R

R

R

I

R

B3

R

I

R

R

R

R

R

R

R

R

R

R

R

R

I

R

B4

I

R

R

R

R

I

R

R

R

I

S

R

R

S

S

R

B8

S

S

S

S

S

S

I

I

S

S

S

S

I

S

S

S

B9

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

B10

S

I

R

R

R

R

R

R

R

I

R

R

R

R

S

R

B14

R

I

R

R

R

R

R

R

R

R

R

R

R

R

I

R

B16

I

S

R

R

R

R

I

I

R

I

R

R

R

S

I

I

C4

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

C5

S

S

S

S

R

R

S

S

S

I

S

S

S

S

S

S

C9

R

I

R

R

R

R

R

R

R

R

R

R

R

R

I

R

C11

S

S

S

S

R

R

I

I

S

S

S

S

S

S

S

S

C20

S

S

S

S

S

S

S

I

S

S

S

S

S

S

S

S

C22

S

S

S

S

S

S

I

I

S

S

R

S

S

S

S

S

C24

R

S

R

R

R

R

I

I

I

R

R

R

R

R

R

R

H4

R

R

R

R

R

R

R

R

R

R

R

R

R

R

I

R

H8

R

R

R

R

R

R

R

R

R

R

R

R

R

R

I

R

H11

R

S

R

R

R

R

I

S

R

R

R

R

R

I

I

I

Isolates were designated as susceptible (S), intermediate (I), or resistant (R) according to CLSI guidelines. GM: gentamicin; TM: tobramycin; IPM: imipenem; DOR: doripenem; CIP: ciprofloxacin; LEV: levofloxacin; CTX: cefotaxime; CRO: ceftrioxone; CAZ: ceftazidime; FEP: cefepime; SXT: trimethoprim/sulfamethoxazole; PIPpiperacillin; TIC: ticarcillin; SAM: ampicillin/sulbactam; TGC: tigecycline; TE: tetracycline.