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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Array-based comparative genomics of Campylobacter jejuni sheep abortion isolates (Part 1)

ABSTRACT: Campylobacter jejuni has become the predominant cause of sheep abortions in the U.S. However, little is know about the genetic diversity among the isolates collected from different time periods. In this study, the genetic diversity of sheep abortion isolates of C. jejuni was investigated by Array-based CGH Each isolate was compared to IA3902, a dye-swap replicate was applied for each isolate

ORGANISM(S): Campylobacter jejuni

SUBMITTER: Zuo-Wei Wu

PROVIDER: E-GEOD-54858 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Array-based comparative genomics of Campylobacter jejuni sheep abortion isolates (Part 2)

Project description:Campylobacter jejuni has become the predominant cause of sheep abortions in the U.S. However, little is know about the genetic diversity among the isolates collected from different time periods. In this study, the genetic diversity of sheep aborion isolates of C. jejuni was investigated by Array-based CGH Each isolate was compared to IA3902, a dye-swap replicate was applied for each isolate

2014-02-11 | E-GEOD-54859 | biostudies-arrayexpress

Array-based comparative genomics of Campylobacter jejuni sheep abortion isolates (Part 1)

Project description:Campylobacter jejuni has become the predominant cause of sheep abortions in the U.S. However, little is know about the genetic diversity among the isolates collected from different time periods. In this study, the genetic diversity of sheep abortion isolates of C. jejuni was investigated by Array-based CGH

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Array-based comparative genomics of Campylobacter jejuni sheep abortion isolates (Part 2)

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Comparative genomic hybridizations of Mycobacterium avium isolates obtained from multiple host species

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2010-06-11 | E-GEOD-7622 | biostudies-arrayexpress

Genomic diversity of a pneumococcal clonal complex, 199

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2010-09-07 | E-GEOD-23992 | biostudies-arrayexpress

Genomics-based molecular epidemiology of human clinical and feedlot cattle C. jejuni isolates in Alberta, Canada

Project description:Oligonucleotide DNA microarrays were used as a platform to compare C. jejuni isolates from feedlot cattle and human clinical cases from Alberta. Comparative genomic hybridization (CGH) analysis was performed on 87 isolates (46 bovine, 41 human) obtained within the same geographical regions and time frame. In addition, We also performed gene association analysis to determine if any genes may be differentially distributed between human and cattle sources or between clusters dominated by either human or cattle isolates (âhuman enrichedâ vs âcattle enrichedâ). Keywords: Comparative Genomic Hybridization; Genomic epidemiology; Gene-association study Data from 119 microarrays is included in the dataset, representing the 89 bacterial strains analyzed (87 field isolates, 2 control laboratory strains). Replicate arrays for 20 of the 87 field isolates were included in the dataset, as well as 5 replicates for each of the 2 laboratory controls. An array representing 1546 ORFs from strain NCTC 11168 was used in CGH experiments. CGH was performed by comparing signal from each Tester field isolate analyzed vs. signal from the Control strain NCTC 11168. Values represent mean of triplicate spots.

2010-05-18 | E-GEOD-13228 | biostudies-arrayexpress

Array-based comparative genomics of Campylobacter jejuni sheep abortion isolates

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2014-02-11 | E-GEOD-54860 | biostudies-arrayexpress

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2012-07-30 | E-GEOD-19558 | biostudies-arrayexpress

Genotyping Tool for Studying Epidemiologically Related Isolates

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2005-11-15 | E-GEOD-3610 | biostudies-arrayexpress

Genomic variations define divergence of water/wildlife-associated Campylobacter jejuni niche specialists from common clonal complexes

Project description:Although the major food-borne pathogen Campylobacter jejuni has been isolated from diverse animal, human and environmental sources, our knowledge of genomic diversity in C. jejuni is based exclusively on human or human food-chain-associated isolates. Studies employing multilocus sequence typing have indicated that some clonal complexes are more commonly associated with particular sources. Using comparative genomic hybridization on a collection of 80 isolates representing diverse sources and clonal complexes, we identified a separate clade comprising a group of water/wildlife isolates of C. jejuni with multilocus sequence types uncharacteristic of human food-chain-associated isolates. By genome sequencing one representative of this diverse group (C. jejuni 1336), and a representative of the bank-vole niche specialist ST-3704 (C. jejuni 414), we identified deletions of genomic regions normally carried by human food-chain-associated C. jejuni. Several of the deleted regions included genes implicated in chicken colonization or in virulence. Novel genomic insertions contributing to the accessory genomes of strains 1336 and 414 were identified. Comparative analysis using PCR assays indicated that novel regions were common but not ubiquitous among the water/wildlife group of isolates, indicating further genomic diversity among this group, whereas all ST-3704 isolates carried the same novel accessory regions. While strain 1336 was able to colonize chicks, strain 414 was not, suggesting that regions specifically absent from the genome of strain 414 may play an important role in this common route of Campylobacter infection of humans. We suggest that the genomic divergence observed constitutes evidence of adaptation leading to niche specialization. Data is also available from <ahref=http://bugs.sgul.ac.uk/E-BUGS-95 target=_blank>BuG@Sbase</a>

2011-04-15 | E-BUGS-95 | biostudies-arrayexpress

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