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The Capnocytophaga canimorsus isolate that caused sepsis in an immunosufficient man was transmitted by the large pine weevil Hylobius abietis.

ABSTRACT: The first vector-borne Capnocytophaga canimorsus sepsis case is presented. An immunocompetent male who denied any contact with canines and who worked in a sawmill was bitten on his neck by a large pine weevil (Hylobius abietis L.; Coleoptera: Curculionidae). Bacteriological diagnosis was confirmed by 16S rRNA gene sequence analysis.

SUBMITTER: Tuuminen T

PROVIDER: S-EPMC4097761 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

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The Capnocytophaga canimorsus isolate that caused sepsis in an immunosufficient man was transmitted by the large pine weevil Hylobius abietis.

Tuuminen Tamara T Viiri Heli H Vuorinen Sakari S

Journal of clinical microbiology 20140507 7

The first vector-borne Capnocytophaga canimorsus sepsis case is presented. An immunocompetent male who denied any contact with canines and who worked in a sawmill was bitten on his neck by a large pine weevil (Hylobius abietis L.; Coleoptera: Curculionidae). Bacteriological diagnosis was confirmed by 16S rRNA gene sequence analysis. ...[more]

PMID: 24808240

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Project description:BackgroundDuring their lifetime, conifer trees are exposed to numerous herbivorous insects. To protect themselves against pests, trees have developed a broad repertoire of protective mechanisms. Many of the plant's defence reactions are activated upon an insect attack, and the underlying regulatory mechanisms are not entirely understood yet, in particular in conifer trees. Here, we present the results of our studies on the transcriptional response and the volatile compounds production of Scots pine (Pinus sylvestris) upon the large pine weevil (Hylobius abietis) feeding.ResultsTranscriptional response of Scots pine to the weevil attack was investigated using a novel customised 36.4 K Pinus taeda microarray. The weevil feeding caused large-scale changes in the pine transcriptome. In total, 774 genes were significantly up-regulated more than 4-fold (p≤0.05), whereas 64 genes were significantly down-regulated more than 4-fold. Among the up-regulated genes, we could identify genes involved in signal perception, signalling pathways, transcriptional regulation, plant hormone homeostasis, secondary metabolism and defence responses. The weevil feeding on stem bark of pine significantly increased the total emission of volatile organic compounds from the undamaged stem bark area. The emission levels of monoterpenes and sesquiterpenes were also increased. Interestingly, we could not observe any correlation between the increased production of the terpenoid compounds and expression levels of the terpene synthase-encoding genes.ConclusionsThe obtained data provide an important insight into the transcriptional response of conifer trees to insect herbivory and illustrate the massive changes in the host transcriptome upon insect attacks. Moreover, many of the induced pathways are common between conifers and angiosperms. The presented results are the first ones obtained by the use of a microarray platform with an extended coverage of pine transcriptome (36.4 K cDNA elements). The platform will further facilitate the identification of resistance markers with the direct relevance for conifer tree breeding.

Dataset Information

The Capnocytophaga canimorsus isolate that caused sepsis in an immunosufficient man was transmitted by the large pine weevil Hylobius abietis.

Publications

The Capnocytophaga canimorsus isolate that caused sepsis in an immunosufficient man was transmitted by the large pine weevil Hylobius abietis.

Similar Datasets

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