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Diversity of genotypes in CTX-M-producing Klebsiella pneumoniae isolated in different hospitals in Brazil BJID
Chagas,Thiago Pavoni Gomes; Alves,Ronaldo Mendes; Vallim,Deyse Christina; Seki,Liliane Miyuki; Campos,Leila Carvalho; Asensi,Marise Dutra.
OBJECTIVE: The present study was undertaken to characterize CTX-M ESBL-producing Klebsiella pneumoniae collected from hospitals in different cities of Brazil. MATERIAL AND METHODS: Eighty-five K. pneumoniae strains isolated from hospitalized patients in six different hospitals of three cities of Brazil were analyzed. ESBL production was confirmed by the standard double-disk synergy test and the Etest®. The MIC50 and MIC90 for ESBL-producing isolates were determined by the Etest® method. The antimicrobial susceptibilities of bacterial isolates were determined using the agar diffusion method according to the CLSI. Screening for blaTEM, blaSHV, blaCTX-M genes and class 1 integron was performed by PCR amplification. To determine the genomic diversity of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Klebsiella pneumoniae; Β-lactamases; Genotype.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702011000500002
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Next-generation sequencing virulome analysis of a Yersinia enterocolitica subsp. palearctica bioserotype 4/O:3 ST18 isolated from human blood in Brazil BJID
Rusak,Leonardo Alves; Junqueira,Ricardo Magrani; Hofer,Ernesto; Vallim,Deyse Christina; Asensi,Marise Dutra.
Abstract Yersinia enterocolitica is a widespread Gram-negative bacterium that causes gastrointestinal disease and other clinical manifestations in humans. Potentially pathogenic Y. enterocolitica has been isolated in Brazil, from human, environmental, food, and animal sources. Herein we report a genome sequence of Y. enterocolitica subsp. palearctica strain YE 19, serotype O:3, biotype 4, sequence type 18, with virulence determinants isolated from human blood in Rio de Janeiro in 2005. The results corroborate other findings that this strain harbors a set of virulence determinants that could play a role in host pathoadaptation and may also justify the successful dissemination of bioserotype 4/O:3 in Brazil. The presence of strains harboring all of these...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Yersinia enterocolitica; Virulence; Brazil; Next-generation sequencing.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000500550
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Occurrence and antimicrobial resistance patterns of Listeria monocytogenes isolated from vegetables BJM
Byrne,Vanessa de Vasconcelos; Hofer,Ernesto; Vallim,Deyse Christina; Almeida,Rogeria Comastri de Castro.
Abstract Although the consumption of fresh and minimally processed vegetables is considered healthy, outbreaks related to the contamination of these products are frequently reported. Among the food-borne pathogens that contaminate vegetables is Listeria monocytogenes, a ubiquitous organism that exhibits the ability to survive and multiply at refrigerated temperatures. This study aimed to evaluate the occurrence of L. monocytogenes in vegetables as well as the antimicrobial resistance of isolates. The results showed that 3.03% of samples were contaminated with L. monocytogenes, comprising 2.22% of raw vegetables and 5.56% of ready-to-eat vegetables. Multiplex PCR confirmed the virulence potential of the isolates. Antimicrobial resistance profiling showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vegetables; Food safety; Listeria monocytogenes; Antimicrobial resistance.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200438
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Virulence genes and genetic relationship of L. monocytogenes isolated from human and food sources in Brazil BJID
Almeida,Rosana Macedo de; Barbosa,André Victor; Lisbôa,Rodrigo de Castro; Santos,André Felipe das Mercês; Hofer,Ernesto; Vallim,Deyse Christina; Hofer,Cristina Barroso.
ABSTRACT The herein presented assay provided a bacteriological and molecular characterization of 100 samples of L. monocytogenes isolated from human (43) and food (57) sources, from several regions of Brazil, and collected between 1975 and 2013. Antigenic characterization defined 49% of serotype 4b samples, followed by 28% of serotype 1/2b, 14% of serotype 1/2c, 8% of serotype 1/2a, and 1% of serotype 3b. Both type of samples from human and food origin express the same serotype distribution. Multiplex PCR analysis showed 13 strains of type 4b with the amplification profile 4b-VI (Variant I). Virulence genes hly, inlA, inlB, inlC, inlJ, actA, plcA, and prfA were detected in all samples, highlighting a deletion of 105pb on the actA gene in 23% of serotype 4b...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Listeria monocytogenes; Listeriosis; Virulence; Food; PFGE; Brazil.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000300282
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