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14th ICID - Poster Abstracts - International Society for Infectious ...

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When citing these abstracts please use the following reference:<br />

Author(s) of abstract. Title of abstract [abstract]. Int J Infect Dis 2010;14S1: Abstract number.<br />

Please note that the official publication of the <strong>International</strong> Journal of <strong>Infectious</strong> Diseases 2010, Volume 14, Supplement 1<br />

is available electronically on http://www.sciencedirect.com<br />

Final Abstract Number: 80.013<br />

Session: Pediatric and Perinatal Infections<br />

Date: Friday, March 12, 2010<br />

Time: 12:30-13:30<br />

Room: <strong>Poster</strong> & Exhibition Area/Ground Level<br />

Type: <strong>Poster</strong> Presentation<br />

Epidemiology, clinical and microbiology characteristic of multiresistant Acinetobacter spp.<br />

bacteremia in a pediatric hospital in Argentina<br />

S. Ruvinsky, G. Fiorilli, G. Perez, B. Juzielewski, L. Mannino, L. Casimir, M. T. Rosanova, H.<br />

Lopardo, R. Bologna<br />

Hospital de Pediatria Dr. Juan P. Garrahan, Buenos Aires, Argentina<br />

Background: Multiresistant Acinetobacter species emerge as an important healthcareassociated<br />

pathogen. An understanding of the epidemiology is necessary in order to develop<br />

strategies to curtail their spread.<br />

Methods: The aim was to analyze the epidemiology, clinical characteristics and antimicrobial<br />

profile of multiresistant Acinetobacter spp. bacteremia (MAB) in a pediatric hospital.<br />

Methods: Demographic and clinical data from all MAB clinically relevant (2005 -2008) at were<br />

collected at Garrahan Hospital.Time–kill studies and a PCR assay with degenerate<br />

oligonucleotide primers were per<strong>for</strong>med. Stata 8.0 was used <strong>for</strong> data analysis.<br />

Results: A total of 50 MAB were analyzed, 66 % was confirmed as A. baumannii and five clones<br />

were detected (clone 1:34%). Time-kill curves tested in the different clones showed only<br />

bactericidal effects in 3/ 5 with ampicillin-sulbactam plus gentamycin and in 5/5 with polymixin<br />

.The median age of the patients was 13.5 months (IQR: 6 a 54 months). The median length of<br />

stay be<strong>for</strong>e bacteremia was 16 days (IQR: 8-32 days), 94% of the patients acquired bacteremia in<br />

PICU. Eighty eight percent of the patients had underlying conditions: congenital heart diseases<br />

(34%), burns (25%) and onco-hematological disease (13.63%) were the most frequent. Ninety<br />

four percent received broad spectrum antibiotics (carbapenems and third-generation<br />

cephalosporin), 20% immunosuppressive therapy and 46% had malnutririon. All patients had<br />

invasive procedures be<strong>for</strong>e bacteremia: 90% central venous line, 80 % had previous<br />

surgery,76% mechanical ventilation and 52 % urinary catheter . The final diagnosis was: central<br />

venous catheter-associated bacteremia (40%), bacteremia related to skin and soft-tissue<br />

infections (26%) and bacteremia (24%). Antibiotics used <strong>for</strong> treatment were: colistin alone (52%),<br />

colistin plus carbapenem (26%), colistin plus piperacillin- tazobactam (10%), colistin plus<br />

ampicillin- sulbactam (4%) and cepefime plus colistin (2% respectively). The median length of<br />

therapy was 14 days (IQR: 14-21 days), 7/50 (14%) patients died but only 3 were related to<br />

bacteremia.<br />

Conclusion: MAB was detected in patients with medical underlying conditions and prolonged<br />

hospitalization. In vitro bactericidal effect was similar with colistin alone as well with the different<br />

combination tested. The development of innovative control strategies is needed in order to limit<br />

the spread of these pathogens

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