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April 27, 2017

Complete genome sequence of Bordetella pertussis Pelita III, the production strain for an Indonesian whole-cell pertussis vaccine.

PT Bio Farma, the sole World Health Organization-approved Indonesian vaccine producer, manufactures a whole-cell whooping cough vaccine (wP) that, as part of a pentavalent diphtheria-tetanus-pertussis/hepatitis B/Haemophilus influenzae b (DTP/HB/Hib) vaccine, is used in Indonesia and many other countries. We report here the whole-genome sequence for Bordetella pertussis Pelita III, PT Bio Farma's wP production strain. Copyright © 2017 Efendi et al.

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March 28, 2017

The history of Bordetella pertussis genome evolution includes structural rearrangement.

Despite high pertussis vaccine coverage, reported cases of whooping cough (pertussis) have increased over the last decade in the United States and other developed countries. Although Bordetella pertussis is well known for its limited gene sequence variation, recent advances in long-read sequencing technology have begun to reveal genomic structural heterogeneity among otherwise indistinguishable isolates, even within geographically or temporally defined epidemics. We have compared rearrangements among complete genome assemblies from 257 B. pertussis isolates to examine the potential evolution of the chromosomal structure in a pathogen with minimal gene nucleotide sequence diversity. Discrete changes in gene order were identified that…

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October 6, 2016

Complete genome sequences of four different Bordetella sp. isolates causing human respiratory infections.

Species of the genus Bordetella associate with various animal hosts, frequently causing respiratory disease. Bordetella pertussis is the primary agent of whooping cough and other Bordetella species can cause similar cough illness. Here, we report four complete genome sequences from isolates of different Bordetella species recovered from human respiratory infections. Copyright © 2016 Weigand et al.

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September 15, 2016

Complete genome sequence of Bordetella pertussis strain VA-190 isolated from a vaccinated 10-year-old patient with whooping cough.

The number of cases of pertussis has increased in the United States despite vaccination. We present the genome of an isolate of Bordetella pertussis from a vaccinated patient from Virginia. The genome was sequenced by long-read methodology and compared to that of a clinical isolate used for laboratory studies, D420. Copyright © 2016 Eby et al.

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May 11, 2016

Genome structural diversity among 31 Bordetella pertussis isolates from two recent U.S. whooping cough statewide epidemics

During 2010 and 2012, California and Vermont, respectively, experienced statewide epidemics of pertussis with differences seen in the demographic affected, case clinical presentation, and molecular epidemiology of the circulating strains. To overcome limitations of the current molecular typing methods for pertussis, we utilized whole-genome sequencing to gain a broader understanding of how current circulating strains are causing large epidemics. Through the use of combined next-generation sequencing technologies, this study compared de novo, single-contig genome assemblies from 31 out of 33 Bordetella pertussis isolates collected during two separate pertussis statewide epidemics and 2 resequenced vaccine strains. Final genome architecture assemblies were…

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November 25, 2015

Complete genome sequences of 11 Bordetella pertussis strains representing the pandemic ptxP3 lineage.

Pathogen adaptation has contributed to the resurgence of pertussis. To facilitate our understanding of this adaptation we report here 11 completely closed and annotated Bordetella pertussis genomes representing the pandemic ptxP3 lineage. Our analyses included six strains which do not produce the vaccine components pertactin and/or filamentous hemagglutinin. Copyright © 2015 Bart et al.

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November 1, 2015

Bordetella pertussis evolution in the (functional) genomics era.

The incidence of whooping cough caused by Bordetella pertussis in many developed countries has risen dramatically in recent years. This has been linked to the use of an acellular pertussis vaccine. In addition, it is thought that B. pertussis is adapting under acellular vaccine mediated immune selection pressure, towards vaccine escape. Genomics-based approaches have revolutionized the ability to resolve the fine structure of the global B. pertussis population and its evolution during the era of vaccination. Here, we discuss the current picture of B. pertussis evolution and diversity in the light of the current resurgence, highlight import questions raised by…

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June 1, 2015

Complete genome sequence of Bordetella pertussis D420.

Bordetella pertussis is the causative agent of whooping cough, a highly contagious, acute respiratory illness that has seen resurgence despite the use of vaccines. We present the complete genome sequence of a clinical strain of B. pertussis, D420, which is representative of a currently circulating clade of this pathogen. Copyright © 2015 Boinett et al.

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February 1, 2015

Whole-genome sequence of a Bordetella pertussis Brazilian vaccine strain.

Despite the reduction in incidence after vaccination, pertussis disease is still considered a public health problem worldwide, mainly due to recent and potential new outbreaks. We report here the complete genome of the Bordetella pertussis Butantan strain used in the Brazilian National Immunization Program as a whole-cell pertussis antigen to compose vaccines such as DTwP (diphtheria, tetanus, and whole-cell pertussis).

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July 1, 2013

Automated, non-hybrid de novo genome assemblies and epigenomes of bacterial pathogens

Understanding the genetic basis of infectious diseases is critical to enacting effective treatments, and several large-scale sequencing initiatives are underway to collect this information. Sequencing bacterial samples is typically performed by mapping sequence reads against genomes of known reference strains. While such resequencing informs on the spectrum of single nucleotide differences relative to the chosen reference, it can miss numerous other forms of variation known to influence pathogenicity: structural variations (duplications, inversions), acquisition of mobile elements (phages, plasmids), homonucleotide length variation causing phase variation, and epigenetic marks (methylation, phosphorothioation) that influence gene expression to switch bacteria from non-pathogenic to pathogenic…

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February 17, 2013

AGBT Conference: Automated de novo genome assemblies and bacterial epigenomes using PacBio sequencing

In this AGBT plenary talk, Jonas Korlach presented a number of collaborative studies between PacBio and other institutions to make use of highly accurate, long-read sequence data, which has led to a revival of finished genomes. Examples from the infectious disease or pathogen realm included Pertussis, Salmonella, and Listeria, all of which now have closed genomes from PacBio-generated data. Korlach also reported on epigenomic information in Salmonella and Listeria, indicating potential new forms of DNA modifications.

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February 17, 2013

AGBT Conference: Automated, non-hybrid de novo genome assemblies and epigenomes of bacterial pathogens

Jonas Korlach, CSO of PacBio, discusses the revival of finished genomes the microbial community will see with long read data, emphasizing that for certain organisms such as rapidly evolving microbes, having a de novo finished genome will be more useful than creating a draft based on a previous related reference genome. Korlach describes two bioinformatic methods from PacBio, a hierarchical genome assembly process (HGAP) and an consensus caller (Quiver), which are used to generate finished genomes from just long-read PacBio data, with final genome sequence accuracies over 99.999%. Korlach demonstrates the ability of PacBio data to generate closed, high-quality de…

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