Widespread dispersion of the resistance element tet(B)::ISCR2 in XDR Acinetobacter baumannii isolates.
Epidemiol Infect
; 144(7): 1574-8, 2016 05.
Article
in En
| MEDLINE
| ID: mdl-26584648
ABSTRACT
Acinetobacter baumannii is a significant nosocomial pathogen often associated with extreme drug resistance (XDR). In Argentina, isolates of A. baumannii resistant to tetracyclines have accounted for more than 40% of drug-resistant isolates in some hospitals. We have previously reported the dispersion of the tet(B) resistance element associated with the ISCR2 transposase in epidemiologically unrelated A. baumannii isolates recovered from 1983 to 2011. This study extends this surveillance to 77 recent (2009-2013) XDR A. baumannii isolates with different levels of minocycline susceptibility. Isolates were examined by a pan-PCR assay, which showed six different amplification patterns, and specific PCRs were used for the confirmation of the the ΔISCR2-tet(B)-tet(R)-ISCR2 element. The tet(B) gene was present in 66 isolates and the ISCR2 element in 68 isolates; the tet(B) gene was associated with ISCR2 in all tet(B)-positive isolates. We conclude that this element is widespread in XDR A. baumannii isolates from Argentina and could be responsible for the emergence of tetracycline resistance in recent years.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Acinetobacter Infections
/
Tetracycline Resistance
/
Acinetobacter baumannii
/
Minocycline
/
Anti-Bacterial Agents
Limits:
Humans
Country/Region as subject:
America do sul
/
Argentina
Language:
En
Journal:
Epidemiol Infect
Journal subject:
DOENCAS TRANSMISSIVEIS
/
EPIDEMIOLOGIA
Year:
2016
Document type:
Article
Affiliation country:
Argentina