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Molecular characterization of Burkholderia mallei strains isolated from Brazil (2014-2017)

ABSTRACT: Molecular characterization of Burkholderia mallei strains isolated from Brazil (2014-2017)

PROVIDER: PRJEB43747 | ENA |

REPOSITORIES: ENA

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Burkholderia mallei isolated in Brazil

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Comparative genomic hybridization of Burkholderia mallei strain ATCC 23344 before and after passage in human host cells

Project description:A whole genome PCR amplicon DNA microarray for B. mallei were fabricated as previously described [7]. Total RNA was isolated from in vitro cultures in LBG medium of B. mallei ATCC 23344, FMH, and JHU. The OD600 of the samples at harvest were all 0.55. The RNAs from FMH and JHU were labeled and hybridized to the array using the ATCC 23344 RNA as the reference using protocols as described. Flip-dye replicates were performed for all analyses. Two B. mallei ATCC 23344 samples grown to an O.D.600 of 1.0 on separate days and total RNA was extracted. These RNA samples were hybridized against each other as a control for the JHU vs. ATCC 23344 hybridization and the FMH vs. ATCC 23344 hybridization.

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The expression of virulence and antimicrobial related proteins in different Burkholderia mallei and Burkholderia pseudomallei isolates

Project description:Burkholderia mallei and Burkholderia pseudomallei are both potential biological threats agents. Melioidosis caused by B. pseudomallei is endemic in Southeast Asia and Northern Australia, while glanders caused by B. mallei infections are rare. Here we studied the proteomes of different B. mallei and B. pseudomallei isolates to determine species specific characteristics. Analyzing the expressed proteomes of B. mallei and B. pseudomallei revealed differences between B. mallei and B. pseudomallei but also between isolates from the same species. Expression of multiple virulence factors and proteins of several PKS/NRPS clusters was demonstrated. Proteome analysis can be used not only to identify bacteria but also to characterize the expression of important factors that putatively contribute to pathogenesis of B. mallei and B. pseudomallei.

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Project description:Burkholderia mallei Genome sequencing

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Phenotypic characterization of Neisseria meningitidis strains isolated from invasive meningococcal disease in Brazil from 2002 to 2017.

Project description:Introduction:Invasive meningococcal disease (IMD) has a high rate of fatality and may cause severe clinical sequelae. Over the years, the epidemiology of IMD has changed significantly in various regions of the world, and laboratory surveillance of this disease is important for mapping epidemiologic changes. Aim:To perform phenotypic characterization of Neisseria meningitidis strains isolated from invasive disease in Brazil from 2002 to 2017, as a complementation of the data obtained in the period of 1990-2001. Methodology:In total, 8,689 isolates sent to Adolfo Lutz Institute confirmed as N. meningitidis by conventional methods were serogrouped by slide agglutination against MenA, MenB, MenC, MenE, MenW, MenX, MenY and MenZ; serotyped and serosubtyped by a whole-cell dot-blotting assay with monoclonal antibodies. Results:The isolates were sent from all regions of Brazil, and the southeast region was responsible for the largest number of isolates (57.2?%). Overall, the total sample (n=8,689) was represented by serogroups C (n=4,729; 54.4?%), B (n=3,313; 38.1?%), W (n=423; 4.9?%), Y (n=203; 2.3?%), X (n=5; 0.1?%) and others (n=16; 0.2?%). A shift in the prevalence of serogroups was observed in 2006, when serogroup C became the most prevalent (65.5?%), surpassing the serogroup B (21.9?%). The main isolated phenotypes were C:23:P1.14-6; B:4,7:P1.19,15; W:2a:P1.5 and W:2a:P1.5,2. Conclusion:The data show an important change in the distribution of meningococcal serogroups, serotypes and subtypes occurring during 2002-2017. A continuous laboratory-based surveillance provides robust information to implement appropriate strategies to IMD control.

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