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Carbapenem-susceptible Acinetobacter baumannii carrying the IS Aba1 upstream bla OXA-51-like gene in Porto Alegre, southern Brazil
SUMMARY Over the last decade, Acinetobacter baumannii resistant to carbapenems has emerged in many medical centres and is commonly associated with high morbidity and mortality. We investigated potential mechanisms contributing to antimicrobial resistance of 58 clinical isolates of A. baumannii colle...
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Published in: | Epidemiology and infection 2013-02, Vol.141 (2), p.330-333 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | SUMMARY
Over the last decade,
Acinetobacter baumannii
resistant to carbapenems has emerged in many medical centres and is commonly associated with high morbidity and mortality. We investigated potential mechanisms contributing to antimicrobial resistance of 58 clinical isolates of
A. baumannii
collected during a prolonged city-wide outbreak in five different hospitals in southern Brazil. The integrase gene was detected in 51 (87·9%) isolates of which 36 harboured class 2 integrons alone and 14 had both class 1 and 2 integrons; all carbapenem-resistant isolates displayed class 2 integrons. IS
Aba1
was found upstream of
bla
OXA-23-like
only in isolates resistant to carbapenems; however, IS
Aba1
upstream of
bla
OXA-51-like
was present in both susceptible and resistant isolates. This is the first report of a high prevalence of class 2 integrons in
A. baumannii
in southern Brazil. Moreover, our study suggests that IS
Aba1/bla
OXA-51-like
alone is insufficient to confer resistance to carbapenems. |
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ISSN: | 0950-2688 1469-4409 |
DOI: | 10.1017/S095026881200074X |