[Antimicrobial resistance of different Acinetobacter baumannii biotypes isolated in the northern region of Chile].
BACKGROUND
Acinetobacter baumannii nosocomial outbreaks are common and the microorganism is frequently resistant to multiple antimicrobials. There is little information about Acinetobacter baumannii antimicrobial susceptibility in the northern region of Chile.


OBJECTIVE
To identify different Acinetobacter baumannii biotypes isolated from clinical samples and to determine their antimicrobial susceptibility.


METHODS
One hundred twenty three Acinetobacter baumannii isolates were studied. The identification and typing of Acinetobacter baumannii was based on phenotypic characteristics. Antimicrobial susceptibility was investigated using agar dilution techniques.


RESULTS
Most Acinetobacter baumannii strains were isolated from wounds, urinary and respiratory infections. Seven biotypes were isolated, being biotype 9 the most frequent. Imipenem was the antimicrobial with the higher activity against the microorganism. Amikacin, cefoperazonesulbactam, ampicillinsulbactam and ceftazidime had a moderate activity. There were high resistance levels to ampicillin and older cephalosporins.


CONCLUSIONS
Acinetobacter baumannii is emerging as a significant nosocomial pathogen in Chile and shows high resistance rates to multiple antibiotics.
Silva
J
J
Departamento de Tecnología Médica, Universidad de Antofagasta, Chile.
Avello
C
C
Matamoro
F
F
Villagra
L
L
Rojas
V
V
Sandoval
L
L
D000150:Acinetobacter / Q000145:classification / Q000187:drug effects* / Q000302:isolation & purification; D015373:Bacterial Typing Techniques; D002677:Chile; D003428:Cross Infection / Q000382:microbiology; D004352:Drug Resistance, Microbial; D006801:Humans; D008826:Microbial Sensitivity Tests