Antimicrobial resistance among Gram-negative bacilli isolated from Latin America: results from SENTRY Antimicrobial Surveillance Program (Latin America, 2008-2010)

Antimicrobial resistance among Gram-negative bacilli isolated from Latin America: results from SENTRY Antimicrobial Surveillance Program (Latin America, 2008-2010)

Author Gales, Ana C. Autor UNIFESP Google Scholar
Castanheira, Mariana Google Scholar
Jones, Ronald N. Google Scholar
Sader, Helio S. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
JMI Labs
Abstract This study updates the frequency and resistance rates of Gram-negative bacilli isolated from Latin American medical centers enrolled in the SENTRY Antimicrobial Surveillance Program. A total of 12,811 bacterial organisms, including 5704 Gram-negative bacilli (44.5%), were consecutively collected (1 per patient) between January 2008 and December 2010 from 10 Latin American medical centers located in Argentina, Brazil, Chile, and Mexico. Antimicrobial susceptibility testing was performed and interpreted by the Clinical and Laboratory Standards Institute broth microdilution method at a central laboratory. All Gram-negative organisms with reduced susceptibility to imipenem or meropenem (MIC, >= 2 mu g/mL) were screened for carbapenemase production by the modified Hodge test and by polymerase chain reaction. ESBL rates were 18.1%, 12.8%, 23.8%, and 48.4% among Escherichia coli and 60.4%, 49.9%, 59.2%, and 33.3% among Klebsiella spp. from Argentina, Brazil, Chile, and Mexico, respectively. Meropenem-nonsusceptible Klebsiella spp. rate was highest in Brazil (11.1%), followed by Argentina (8.2%), Chile (5.0%), and Mexico (0.8%). Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae was not detected in 2008, but emerged in 2009 (10 strains) and increased significantly in 2010 (44: P < 0.0001). bla(KPC-2) was detected in 54 (65.9%) of 85 carbapenem-nonsusceptible K. pneumoniae. Meropenem-nonsusceptible P. aeruginosa was observed in 53.8%, 46.7%, 33.3%, and 28.8% of strains from Argentina, Brazil, Chile, and Mexico, respectively. Imipenem-resistant Acinetobacter spp. rates increased from 6.4%, 12.6%, and 0.0% in the 1997-1999 period to 84.9%, 71.4%, and 50.0% in 2008-2010 in Argentina, Brazil, and Chile, respectively. Oxacillinase (OXA)-producing Acinetobacter spp. was documented in Argentina (OXA-23 and -24), Brazil (0)(A-23), Chile (OXA-58), and Mexico (OXA-24). Only colistin showed >77% overall coverage against the 5 most frequently isolated Gram-negative bacilli from Latin American Medical centers participating in the SENTRY Program. (C) 2012 Elsevier Inc. All rights reserved.
Keywords Pseudomonas aeruginosa
Acinetobacter
Escherichia coli
Klebsiella
Carbapenems
Language English
Date 2012-08-01
Published in Diagnostic Microbiology and Infectious Disease. New York: Elsevier B.V., v. 73, n. 4, p. 354-360, 2012.
ISSN 0732-8893 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 354-360
Origin http://dx.doi.org/10.1016/j.diagmicrobio.2012.04.007
Access rights Closed access
Type Article
Web of Science ID WOS:000306624800012
URI http://repositorio.unifesp.br/handle/11600/35133

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