A novel Ehrlichia strain (Rickettsiales: Anaplasmataceae) detected in Amblyomma triste (Acari: Ixodidae), a tick species of public health importance in the Southern Cone of America
| Autor: | Darío Silva, Santiago Nava, María N. De Salvo, Paula Díaz Pérez, Gabriel L. Cicuttin, José M. Venzal, María L. Félix |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Phylogenetic tree Ehrlichia animal diseases 030231 tropical medicine 030106 microbiology Public Health Environmental and Occupational Health Amblyomma Zoology General Medicine Biology Tick bacterial infections and mycoses biology.organism_classification Microbiology Anaplasmataceae 03 medical and health sciences 0302 clinical medicine Infectious Diseases parasitic diseases bacteria Parasitology Acari Rickettsiales Ixodidae |
| Zdroj: | Pathogens and Global Health. 114:318-322 |
| ISSN: | 2047-7732 2047-7724 |
| Popis: | The aim of this work was to report the detection of a putative novel Ehrlichia strain associated with the tick Amblyomma triste. Free-living adult ticks determined as A. triste were collected by drag-sampling in Argentina and Uruguay. Molecular detection of Ehrlichia agents was performed targeting three different loci: 16S rRNA gene, dsb gene and a fragment of groESL heat shock operon. In total, 164 adults of A. triste (38 from INTA E.E.A Delta del Parana in Argentina and 126 from Toledo Chico in Uruguay) were analyzed. One tick (0.6%) collected in INTA E.E.A. Delta del Parana (Argentina) was positive. The phylogenetic analyses show that the Ehrlichia strain found in this study (named Ehrlichia sp. strain Delta) represents an independent lineage within the genus Ehrlichia, close to E. chaffeensis and E. muris. This is also the first report of an Ehrlichia agent infecting the tick A. triste. The medical and veterinary significance of Ehrlichia sp. strain Delta remains to be demonstrated. However, it is important to mention that adults of A. triste are aggressive to humans and domestic mammals. Therefore, the potential role of A. triste in the transmission of Ehrlichia agents to humans or domestic animals across its distributional range should be highlighted, even more considering that Ehrlichia sp. strain Delta is phylogenetically related to the zoonotic E. chaffeensis, which is recognized as pathogenic to both humans and animals. |
| Databáze: | OpenAIRE |
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