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Author: search.filters.author.Allen L. RichardsSubject: search.filters.subject.trombiculidae

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    Item type:Publication,
    Hosts and vectors of scrub typhus in Chile: epidemiological study and molecular analyses of Orientia infection in rodents and rodent-associated mites
    (Springer Science and Business Media LLC, 2024-12-18)
    Constanza Martínez-Valdebenito
    ;
    Gerardo Acosta-Jamett
    ;
    Rayitray Abello
    ;
    Ju Jiang
    ;
    Allen L. Richards
    <jats:title>Abstract</jats:title><jats:p><jats:italic>Candidatus</jats:italic> Orientia chiloensis causes scrub typhus over a wide geographical range in southern Chile. The life cycle, including vectors and reservoirs of this novel rickettsial pathogen, is incompletely understood. We analyzed rodent tissue and rodent-associated mite samples collected during a field study in six localities on Chiloé Island, where human scrub typhus cases have occurred. Using molecular methods, we detected <jats:italic>Orientia</jats:italic> DNA in 24.8% of rodents, belonging to five of seven captured species. <jats:italic>Orientia</jats:italic>-infection rates showed geographical variations, but were not influenced by rodent species, sex, age, and mite infestation. Phylogenetic analysis showed that <jats:italic>Orientia</jats:italic> sequences from trombiculid mites (<jats:italic>Proschoengastia eloisae</jats:italic>) were identical to those from scrub typhus patients from the same region. The results suggest that these rodent-associated mites serve as vectors and play an important role in the ecology of scrub typhus in southern Chile. Further studies are required to determine whether <jats:italic>Orientia</jats:italic>-infected rodents can also serve as reservoir of <jats:italic>Orientia</jats:italic> in Chile.</jats:p> <jats:p><jats:bold>Graphical Abstract</jats:bold></jats:p>
      1Scopus© Citations 8
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    Marginalized mites: Neglected vectors of neglected diseases
    (2020)
    WEITZEL, THOMAS  
    ;
    Benjamin L. Makepeace
    ;
    Ivo Elliott
    ;
    Kittipong Chaisiri
    ;
    Allen L. Richards
      1Scopus© Citations 15  2
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    Identification of trombiculid mites (Acari: Trombiculidae) on rodents from Chiloé Island and molecular evidence of infection with Orientia species
    (2020)
    Gerardo Acosta-Jamett
    ;
    Constanza Martínez-Valdebenito
    ;
    Esperanza Beltrami
    ;
    María Carolina Silva-de La Fuente
    ;
    Ju Jiang
      23  1Scopus© Citations 42
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    Scrub typhus risk in travelers to southern Chile
    (2019)
    Thomas Weitzel  
    ;
    Gerardo Acosta-Jamett
    ;
    Constanza Martínez-Valdebenito
    ;
    Allen L. Richards
    ;
    Martin P. Grobusch
      2Scopus© Citations 16