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• W2784110928 abstract "The extensive use of antibiotics has led to the emergence of multi-resistant strains in some species of the genus Acinetobacter.To investigate the molecular characteristics of multidrug-resistant of Acinetobacter ssp. strains isolated from 52 patients collected between March 2009 and July 2010 in medical intensive care units in Cali - Colombia.The susceptibility to various classes of antibiotics was determined by disc diffusion method, and the determination of the genomic species was carried out using amplified ribosomal DNA restriction analysis (ARDRA) and by sequencing of the 16s rDNA gene. Also, the genes of beta-lactamases as well as, integrases IntI1 and IntI2 were analyzed by PCR method.The phenotypic identification showed that the isolates belong mainly to A. calcoaceticus- A. baumannii complex. All of them were multi-resistant to almost the whole antibiotics except to tigecycline and sulperazon, and they were grouped into five (I to V) different antibiotypes, being the antibiotype I the most common (50.0%). The percent of beta-lactamases detected was: blaTEM (17.3%), blaCTX-M (9.6%), blaVIM (21.2%), blaIMP (7.7%), blaOXA-58 (21.2%), and blaOXA-51 (21.2%). The phylogenetic tree analysis showed that the isolates were clustering to A. baumannii (74.1%), A. nosocomialis (11.1%) and A. calcoaceticus (7.4 %). Besides, the integron class 1 and class 2 were detected in 23.1% and 17.3% respectively.The isolates were identified to species A. baumanii mainly, and they were multiresistant. The resistance to beta-lactams may be by for presence of beta-lactamases in the majority of the isolates.El uso extensivo de antibióticos ha llevado a la emergencia de cepas multirresistentes en algunas especies del género Acinetobacter.Investigar las características moleculares de resistencia a múltiples fármacos de cepas aisladas de Acinetobacter spp. colectadas entre marzo de 2009 y julio de 2010 en 52 pacientes de unidades de cuidados intensivos en Cali - Colombia.La susceptibilidad a diversas clases de antibióticos se determinó mediante el método de difusión de disco, y la determinación de la especie genómica se llevó a cabo usando un análisis de restricción de ADN ribosómico amplificado (ARDRA) y mediante la secuenciación del gen 16s de ADNr. Además, se analizaron por el método de PCR los genes de las beta-lactamasas, como también, las integrasas IntI1 e IntI2.La identificación fenotípica mostró que los aislamientos pertenecen principalmente al complejo A. calcoaceticus - A. baumannii. Todos ellos eran multirresistentes a casi todos los antibióticos excepto tigeciclina y sulperazón, y se agruparon en cinco (I a V) antibitipos diferentes, siendo el antibiotipo I el más común (50%). El porcentaje de betalactamasas detectadas fue: blaTEM (17,3%), blaCTX-M (9,6%), blaVIM (21,2%), blaIMP (7,7%), blaOXA-58 (21,2%), blaOXA- 51 (21.2%). El análisis del árbol filogenético mostró que los aislados se agrupaban en A. baumannii (74.1%), A. nosocomialis (11.1%) y A. calcoaceticus (7.4%). Además, el integrón clase 1 y clase 2 se detectaron en 23.1% y 17.3% respectivamente.los aislamientos se identificaron principalmente como la especie A. baumanii, y fueron multirresistentes. La resistencia a los betalactámicos puede deberse a la presencia de betalactamasas en la mayoría de los aislamientos." @default.
• W2784110928 created "2018-01-26" @default.
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• W2784110928 date "2017-10-01" @default.
• W2784110928 modified "2023-09-30" @default.
• W2784110928 title "Characterization of multidrug-resistant Acinetobacter ssp. strains isolated from medical intensive care units in Cali - Colombia." @default.
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• W2784110928 doi "https://doi.org/10.25100/cm.v48i4.2858" @default.
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