Orientia
| Orientia | |
|---|---|
| |
| Orientia tsutsugamushi | |
Scientific classification
| |
| Domain: | Bacteria |
| Phylum: | Pseudomonadota |
| Class: | Alphaproteobacteria |
| Order: | Rickettsiales |
| Family: | Rickettsiaceae |
| Genus: | Orientia |
| Species | |
Orientiais agenusofbacteriainfamilyRickettsiaceae.They areobligateintracellular,gram-negativebacteria found in insects and mammals. They are spread through the bites or feces of infected insects.
The genus comprises the speciesOrientia tsutsugamushiandOrientia chuto,which both causescrub typhusin humans.[1][2][3]
Candidatus Orientia chiloensis
[edit]Orientia chiloensisis a possible new species of Orientia identified as such by a highly divergent type-specific antigen gene.[4]
In Chile scrub typhus is known to occur in the southern half of the country and in particularChiloé Islandand thefjords and channels of Patagonia.Between 2015 and 2020 there was a total of 40 known cases in Chile with much of the people affected reporting to work in gathering and cutting firewood.[5]According to Chilean scientist Katia Abarca the disease in Chile corresponds to an endemic variety of the bacteria and has thus not arrived from the "Tsutsugamushi Triangle".[5]The fact that the disease was first reported in 2006 in Chile is likely the result of under-diagnosis and underreporting.[5]In January 2020, the disease was for the first time reported inChile's southernmost region.[5]Based on a study in northern Chiloé Island mites living in rodents are thought to be reservoirs and vectors of the disease.[6]
References
[edit]- ^"New Orientia tsutsugamushi Strain from Scrub Typhus in Australia".Retrieved2008-11-20.
- ^LSPN lpsn.dsmz.de
- ^Izzard, L (2010)."Isolation of a novel Orientia species (O. chuto sp. nov.) from a patient infected in Dubai".J Clin Microbiol.48(12): 4404–4409.doi:10.1128/JCM.01526-10.PMC3008486.PMID20926708.
- ^Abarca, Katia; Martínez-Valdebenito, Constanza; Angulo, Jenniffer; Jiang, Ju; Farris, Christina R.; Richards, Allen L.; Acosta-Jamett, Gerardo; Weitzel, Thomas (2020)."Molecular Description of a Novel Orientia Species Causing Scrub Typhus in Chile".Emerging Infectious Diseases.26(9): 2148–2156.doi:10.3201/eid2609.200918.PMC7454112.PMID32818400.
- ^abcdGonzález, C. (January 29, 2020). "Una bacteria presente en ácaros causa un raro tipo de infección en el sur".El Mercurio(in Spanish). p. A9.
- ^Acosta Jamett, Gerado; Martïnez-Valdebenito, Constanza; Beltrami, Esperanza; Silva-de La Fuente, María Carolina; Jiang, Ju; Richards, Allen L.; Weitzel, Thomas; Abarca, Katia (2020-01-23)."Identification of trombiculid mites (Acari: Trombiculidae) on rodents from Chiloé Island and molecular evidence of infection with Orientia species".PLOS Neglected Tropical Diseases.14(1): e0007619.doi:10.1371/journal.pntd.0007619.PMC6999909.PMID31971956.
External links
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