RESUMO
Multidrug-resistant (MDR) Corynebacterium striatum has been cited with increased frequency as pathogen of nosocomial infections. In this study, we report the draft genome of a C. striatum isolated from a patient with bloodstream infection in a hospital of Rio de Janeiro, Brazil. The isolate presented susceptibility only to tetracycline, vancomycin and linezolid. The detection of various antibiotic resistance genes is fully consistent with previously observed multidrug-resistant pattern in Corynebacterium spp. A large part of the pTP10 plasmid of MDR C. striatum M82B is present in the genome of our isolate. A SpaDEF cluster and seven arrays of CRISPR-Cas were found.
Assuntos
Bacteriemia/microbiologia , Infecções por Corynebacterium/microbiologia , Corynebacterium/efeitos dos fármacos , Corynebacterium/genética , Infecção Hospitalar/microbiologia , Farmacorresistência Bacteriana Múltipla/genética , Genoma Bacteriano/genética , Antibacterianos/farmacologia , Brasil , Corynebacterium/isolamento & purificação , Surtos de Doenças , Farmacorresistência Bacteriana Múltipla/efeitos dos fármacos , Eletroforese em Gel de Campo Pulsado , Genótipo , Humanos , Testes de Sensibilidade Microbiana , Análise de Sequência de DNARESUMO
Despite the broad distribution of M. ozzardi in Latin America and the Caribbean, there is still very little DNA sequence data available to study this neglected parasite's epidemiology. Mitochondrial DNA (mtDNA) sequences, especially the cytochrome oxidase (CO1) gene's barcoding region, have been targeted successfully for filarial diagnostics and for epidemiological, ecological and evolutionary studies. MtDNA-based studies can, however, be compromised by unrecognised mitochondrial pseudogenes, such as Numts. Here, we have used shot-gun Illumina-HiSeq sequencing to recover the first complete Mansonella genus mitogenome and to identify several mitochondrial-origin pseudogenes. Mitogenome phylogenetic analysis placed M. ozzardi in the Onchocercidae "ONC5" clade and suggested that Mansonella parasites are more closely related to Wuchereria and Brugia genera parasites than they are to Loa genus parasites. DNA sequence alignments, BLAST searches and conceptual translations have been used to compliment phylogenetic analysis showing that M. ozzardi from the Amazon and Caribbean regions are near-identical and that previously reported Peruvian M. ozzardi CO1 reference sequences are probably of pseudogene origin. In addition to adding a much-needed resource to the Mansonella genus's molecular tool-kit and providing evidence that some M. ozzardi CO1 sequence deposits are pseudogenes, our results suggest that all Neotropical M. ozzardi parasites are closely related.
Assuntos
Complexo IV da Cadeia de Transporte de Elétrons/genética , Genoma Mitocondrial , Mansonella/classificação , Mansonella/genética , Mansonelose/parasitologia , Pseudogenes , Animais , Genômica/métodos , Humanos , Filogenia , RNA Ribossômico/genética , RNA Ribossômico 5S/genéticaRESUMO
Multidrug-resistant (MDR) Corynebacterium striatum has been cited with increased frequency as pathogen of nosocomial infections. In this study, we report the draft genome of a C. striatum isolated from a patient with bloodstream infection in a hospital of Rio de Janeiro, Brazil. The isolate presented susceptibility only to tetracycline, vancomycin and linezolid. The detection of various antibiotic resistance genes is fully consistent with previously observed multidrug-resistant pattern in Corynebacterium spp. A large part of the pTP10 plasmid of MDR C. striatum M82B is present in the genome of our isolate. A SpaDEF cluster and seven arrays of CRISPR-Cas were found.
Assuntos
Humanos , Infecção Hospitalar/transmissão , Genoma/genética , Infecções por Corynebacterium/terapia , Brasil/epidemiologiaRESUMO
The genus Mycobacterium is highly diverse and ubiquitous in nature, comprehending fast- and slow-growing species with distinct impact in public health. The plasmid-mediated horizontal gene transfer represents one of the major events in bacteria evolution. Here, we report the complete sequence of a 160,489 bp circular plasmid (pCBMA213_2) from an atypical and fast-growing environmental mycobacteria. This is a unique plasmid, in comparison with the characterised mycobacteria plasmids, harboring a type IV-like and ESX-P2 type VII secretion systems. pCBMA213_2 can be further explored for evolutionary and conjugation studies as well as a tool to manipulate DNA within this bacteria genus.
Assuntos
Humanos , Plasmídeos/genética , DNA Bacteriano/genética , Dados de Sequência Molecular , Sistemas de Secreção Tipo VII/genética , Micobactérias não Tuberculosas/genética , Análise de SequênciaRESUMO
The genus Mycobacterium is highly diverse and ubiquitous in nature, comprehending fast- and slow-growing species with distinct impact in public health. The plasmid-mediated horizontal gene transfer represents one of the major events in bacteria evolution. Here, we report the complete sequence of a 160,489 bp circular plasmid (pCBMA213_2) from an atypical and fast-growing environmental mycobacteria. This is a unique plasmid, in comparison with the characterised mycobacteria plasmids, harboring a type IV-like and ESX-P2 type VII secretion systems. pCBMA213_2 can be further explored for evolutionary and conjugation studies as well as a tool to manipulate DNA within this bacteria genus.
Assuntos
DNA Bacteriano/genética , Micobactérias não Tuberculosas/genética , Sistemas de Secreção Tipo IV/genética , Sistemas de Secreção Tipo VII/genética , Humanos , Dados de Sequência Molecular , Plasmídeos/genética , Análise de Sequência de DNARESUMO
Neisseria meningitidis infections are a major issue for global health. The invasive MenC ST-103 clonal complex (CC103) has been the most prevalent in meningococcal outbreaks in Brazil, occurring also in several countries worldwide. Here we have analysed the population structure and accessory genome of MenC CC103 strains from a global perspective. An in-depth phylogenomic analysis revealed a lineage of N. meningitidis causing meningitis in Brazil and the United Kingdom. This lineage was also characterized as harbouring a particular accessory genome composed of CRISPR/Cas and restriction modification systems. This lineage was also characterized by a genomic island resembling an integrative and conjugative element. This island carried genes potentially associated with virulence and fitness. We propose this accessory gene repertoire could be contributing to the spatial-temporal persistence of the invasive MenC CC103 lineage.
Assuntos
Genes Bacterianos , Neisseria meningitidis/genética , Brasil , Sistemas CRISPR-Cas/genética , DNA Circular/genética , Ilhas Genômicas/genética , Geografia , Meningite Meningocócica/epidemiologia , Meningite Meningocócica/genética , Filogenia , Prófagos/genéticaRESUMO
Chikungunya virus (CHIKV) is a mosquito-borne pathogen that emerged in Brazil by late 2014. In the country, two CHIKV foci characterized by the East/Central/South Africa and Asian genotypes, were established in North and Northeast regions. We characterized, by phylogenetic analyses of full and partial genomes, CHIKV from Rio de Janeiro state (2014-2015). These CHIKV strains belong to the Asian genotype, which is the determinant of the current Northern Brazilian focus, even though the genome sequence presents particular single nucleotide variations. This study provides the first genetic characterisation of CHIKV in Rio de Janeiro and highlights the potential impact of human mobility in the spread of an arthropod-borne virus.
Assuntos
Humanos , Vírus Chikungunya/genética , Brasil , Febre de Chikungunya/transmissão , Vírus Chikungunya/isolamento & purificação , FilogeniaRESUMO
Chikungunya virus (CHIKV) is a mosquito-borne pathogen that emerged in Brazil by late 2014. In the country, two CHIKV foci characterized by the East/Central/South Africa and Asian genotypes, were established in North and Northeast regions. We characterized, by phylogenetic analyses of full and partial genomes, CHIKV from Rio de Janeiro state (2014-2015). These CHIKV strains belong to the Asian genotype, which is the determinant of the current Northern Brazilian focus, even though the genome sequence presents particular single nucleotide variations. This study provides the first genetic characterisation of CHIKV in Rio de Janeiro and highlights the potential impact of human mobility in the spread of an arthropod-borne virus.
Assuntos
Vírus Chikungunya/genética , Brasil , Febre de Chikungunya/transmissão , Vírus Chikungunya/isolamento & purificação , Genótipo , Humanos , FilogeniaRESUMO
Parvovirus B19 (B19V) infects individuals worldwide and is associated with an ample range of pathologies and clinical manifestations. B19V is classified into three distinct genotypes, all identified in Brazil. Here, we report a complete sequence of a B19V genotype 1A that was obtained by high-throughput metagenomic sequencing. This genome provides information that will contribute to the studies on B19V epidemiology and evolution.
Assuntos
Genoma Viral/genética , Parvovirus B19 Humano/genética , Brasil , Criança , Evolução Fatal , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Masculino , Parvovirus B19 Humano/classificação , Análise de Sequência de DNARESUMO
Mycobacterium tuberculosis of the Bejing subtype (MtbB) is transmitted efficiently in high burden countries for this genotype. A higher virulence was associated with isolates of the "modern" Beijing genotype sub-lineages when compared to "ancient" ones. Here, we report the full genomes of the strain representing these two genotypes from Brazil, a country with a low incidence of MtbB.
RESUMO
Parvovirus B19 (B19V) infects individuals worldwide and is associated with an ample range of pathologies and clinical manifestations. B19V is classified into three distinct genotypes, all identified in Brazil. Here, we report a complete sequence of a B19V genotype 1A that was obtained by high-throughput metagenomic sequencing. This genome provides information that will contribute to the studies on B19V epidemiology and evolution.
Assuntos
Criança , Humanos , Masculino , Genoma Viral/genética , /genética , Brasil , Evolução Fatal , Sequenciamento de Nucleotídeos em Larga Escala , /classificação , Análise de Sequência de DNARESUMO
Human T-lymphotropic virus type 1 (HTLV-1) has a global spread, and it is estimated that around 20 million persons are infected. Seven major genetic subtypes are recognized. However, there are complete genomes only from the HTLV-1a (cosmopolitan) and HTLV-1c (Melanesian) subtypes. Here, the first full-length genome of an HTLV-1b strain, a subtype so far restricted to Central African countries, is revealed. The genome size of HTLV-1b SF26, a strain isolated in Brazil, was determined to be 8,267 bp. The genomic analysis showed that all characteristic regions and genes of a prototypic HTLV-1 virus are conserved. This genome can provide information for further studies on the evolutionary history and pathogenic potential of this human oncovirus.
