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Community-acquired bacteremia in adult patients attending the emergency service of a teaching hospital



Community-acquired bacteremia in adult patients attending the emergency service of a teaching hospital



Revista Argentina de Microbiologia 44(1): 10-15



La bacteriemia es causa importante de morbimortalidad. Nuestro objetivo es describir una serie de episodios de bacteriemia de origen comunitario en adultos, registrados en el hospital de Cl nicas de C rdoba. Entre enero de 2005 y diciembre de 2009 se estudiaron 271 episodios. La rentabilidad diagn stica del hemocultivo fue 13,5 %. El 52 % de los pacientes eran varones y el 48 % mujeres, la edad promedio fue de 60 a os. Las comorbilidades prevalentes fueron diabetes (21 %), neoplasia (18 %), cardiopat a (11 %) e infecci n por HIV (8 %). Los focos que se pudieron establecer fueron el respiratorio (21 %), el urinario (15 %), el cut neo (9 %) y otros (13 %). Predominaron las bacterias gram positivas (51,4 %). Los microorganismos m s frecuentes fueron Escherichia coli (25 %), Streptococcus pneumoniae (22,9 %) y Staphylococcus aureus (12,3 %). La bacteriemia fue polimicrobiana en el 7 % de los casos. El 33 % de los aislamientos de E. coli present resistencia a la ciprofloxacina y el 6 % a la ceftacidima. El 14 % de los aislamientos de S. aureus fue resistente a la oxacilina. Solo el 7 % de los aislamientos de S. pneumoniae expres altos niveles de resistencia a la penicilina seg n el criterio poblacional, con CIM = 2 ug/ml.Bacteremia is an important cause of morbimortality. This study describes the episodes of community-acquired bacteremia in adult patients registered at our hospital. Between January 2005, and December 2009, 271 episodes were studied. The diagnostic yield of blood cultures was 13.5 %. A total of 52 % of patients were male and 48 % female. The mean age was 60. The most frequent comorbidities were: diabetes (21 %), neoplasia (18 %), cardiopathy (11 %), and HIV infection (8 %). The focus was- respiratory (21 %), urinary (15 %), cutaneous (9 %), and others (13 %). Gram-positive bacteria prevailed (51.4%). The most frequent microorganisms were Escherichia coli (25 %), Streptococcus pneumoniae (22.9 %), and Staphylococcus aureus (12.3 %). Bacteremia was polymicrobial in 7 % of the cases. Thirty three percent of E. coli isolates were resistant to ciprofloxacin and 6 % to ceftazidime. Fourteen percent of S. aureus strains were resistant to oxacillin whereas only 7 % of S. pneumoniae expressed high resistance to penicillin with MICs = 2 ug/ml, according to meningitis breakpoints.

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Accession: 036526074

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PMID: 22610291


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