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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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Scrub typhus in Tierra del Fuego: a tropical rickettsiosis in a subantarctic region
(2021)
WEITZEL, THOMAS
;
AYLWIN RAMIREZ, MABEL CRISTINA
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Constanza Martínez-Valdebenito
;
Gerardo Acosta-Jamett
;
Katia Abarca
10Scopus© Citations 10
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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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Molecular Description of a Novel <i>Orientia</i> Species Causing Scrub Typhus in Chile
(2020)
Katia Abarca
;
Constanza Martínez-Valdebenito
;
Jenniffer Angulo
;
Ju Jiang
;
Christina M. Farris
1Scopus© Citations 78 1
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Novel Vector of Scrub Typhus in Sub-Antarctic Chile: Evidence From Human Exposure
(2021)
WEITZEL, THOMAS
;
María Carolina Silva-de la Fuente
;
Constanza Martínez-Valdebenito
;
Alexandr A Stekolnikov
;
Caricia Pérez
<jats:title>Abstract</jats:title> <jats:p>The exposure of a research team to chigger mites in southern Chile allowed the first identification of a trombiculid species as vector and reservoir of scrub typhus outside the tsutsugamushi triangle, providing unique insights into the ecology and transmission of this recently discovered rickettsial infection in South America.</jats:p>
Scopus© Citations 22 5
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Human seroepidemiology of Rickettsia and Orientia species in Chile – A cross-sectional study in five regions
(2020)
WEITZEL, THOMAS
;
Gerardo Acosta-Jamett
;
Ju Jiang
;
Constanza Martínez-Valdebenito
;
Christina M. Farris
11 1Scopus© Citations 11
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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
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Scrub Typhus in Continental Chile, 2016–2018
(2019)
WEITZEL, THOMAS
;
Constanza Martínez-Valdebenito
;
Gerardo Acosta-Jamett
;
Ju Jiang
;
Allen L. Richards
14Scopus© Citations 57
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Prevalence and Risk Factors of Antibodies to Anaplasma spp. in Chile: A Household-Based Cross-Sectional Study in Healthy Adults and Domestic Dogs
(2020)
Gerardo Acosta-Jamett
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WEITZEL, THOMAS
;
Javier López
;
Doris Alvarado
;
Katia Abarca
1Scopus© Citations 11 1

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