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Revista de la Asociación Médica del Centro Médico ABC

2015, Number 4

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An Med Asoc Med Hosp ABC 2015; 60 (4)

Frequency and susceptibility profile of the isolation blood cultures in a tertiary hospital

Ramírez CAJ, Moreno LLC, Núñez MME, Cebada LRM, Aguirre MCE

Language: Spanish
References: 24
Page: 255-260
PDF size: 223.17 Kb.


ABSTRACT

Background: Nosocomial infections have a significant impact on morbidity, mortality, length of hospital stay, and costs of patient care. Each hospital should understand the epidemiology and microbiology of these infections. The objective of this study was to determine the frequency of isolates in blood cultures and their susceptibility profile at the ABC Medical Center. Methods: Cultures were processed according to international standards in the hospital’s clinical laboratory. MicroScan® (SIEMENS) was used for identification and susceptibility profile from January 2009 to June 2013, whereas from 2013 to April 2014, Vitek 2® (BIOMÉRIEUX) system was used instead. The determination of susceptibility was performed by serial agar dilution according to the recommendations of the CLSI. Results: A total of 25,920 blood cultures were obtained from both campuses, 23,880 (92.1%) from adult patients, and 2,040 (7.9%) from pediatric patients. Microbiological growth was found in 2,819 (10.9%), 2,651 were adult samples, and 168 pediatric; 413 (1.6%) were considered contaminants (404 adult and 9 pediatric), while 23,101 (89.1%) showed no development. The most common organism found was Escherichia coli with 466 isolates (33.7%), followed by coagulase-negative staphylococci in 289 (20.9%) and Staphylococcus aureus (105 isolates, 7.6%). Conclusions: This study shows data similar to that found in Mexico and some parts of the world; it also makes us aware of the hospital’s epidemiology.


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