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84 results

Page 1 of 5

  • Ectoparasite and bacterial population genetics and community structure indicate extent of bat movement across an island chain

  • Clifton D. McKee, Alison J. Peel, David T. S. Hayman, Richard Suu-Ire, Yaa Ntiamoa-Baidu, Andrew A. Cunningham, James L. N. Wood, Colleen T. Webb, Michael Y. Kosoy
  • Journal:
    Parasitology / Volume 151 / Issue 7 / June 2024
    Published online by Cambridge University Press:
    24 May 2024, pp. 708-721
    • Article
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  • Few studies have examined the genetic population structure of vector-borne microparasites in wildlife, making it unclear how much these systems can reveal about the movement of their associated hosts. This study examined the complex host–vector–microbe interactions in a system of bats, wingless ectoparasitic bat flies (Nycteribiidae), vector-borne microparasitic bacteria (Bartonella) and bacterial endosymbionts of flies (Enterobacterales) across an island chain in the Gulf of Guinea, West Africa. Limited population structure was found in bat flies and Enterobacterales symbionts compared to that of their hosts. Significant isolation by distance was observed in the dissimilarity of Bartonella communities detected in flies from sampled populations of Eidolon helvum bats. These patterns indicate that, while genetic dispersal of bats between islands is limited, some non-reproductive movements may lead to the dispersal of ectoparasites and associated microbes. This study deepens our knowledge of the phylogeography of African fruit bats, their ectoparasites and associated bacteria. The results presented could inform models of pathogen transmission in these bat populations and increase our theoretical understanding of community ecology in host–microbe systems.

  • Latin American Reference Books: An Underappreciated Genre

  • Richard D. Woods
  • Journal:
    Latin American Research Review / Volume 24 / Issue 2 / 1989
    Published online by Cambridge University Press:
    12 October 2022, pp. 231-245
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  • Neurobiology of subtypes of trichotillomania and skin picking disorder

  • Jon E. Grant, Richard A. I. Bethlehem, Samuel R. Chamberlain, Tara S. Peris, Emily J. Ricketts, Joseph O’Neill, Darin D. Dougherty, Dan Stein, Christine Lochner, Douglas W. Woods, John Piacentini, Nancy J. Keuthen
  • Journal:
    CNS Spectrums / Volume 28 / Issue 1 / February 2023
    Published online by Cambridge University Press:
    03 November 2021, pp. 98-103
  • Background

    Trichotillomania (TTM) and skin picking disorder (SPD) are common and often debilitating mental health conditions, grouped under the umbrella term of body-focused repetitive behaviors (BFRBs). Recent clinical subtyping found that there were three distinct subtypes of TTM and two of SPD. Whether these clinical subtypes map on to any unique neurobiological underpinnings, however, remains unknown.

    Methods

    Two hundred and fifty one adults [193 with a BFRB (85.5% [n = 165] female) and 58 healthy controls (77.6% [n = 45] female)] were recruited from the community for a multicenter between-group comparison using structural neuroimaging. Differences in whole brain structure were compared across the subtypes of BFRBs, controlling for age, sex, scanning site, and intracranial volume.

    Results

    When the subtypes of TTM were compared, low awareness hair pullers demonstrated increased cortical volume in the lateral occipital lobe relative to controls and sensory sensitive pullers. In addition, impulsive/perfectionist hair pullers showed relative decreased volume near the lingual gyrus of the inferior occipital–parietal lobe compared with controls.

    Conclusions

    These data indicate that the anatomical substrates of particular forms of BFRBs are dissociable, which may have implications for understanding clinical presentations and treatment response.

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