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Identificación de Rickettsia andeanae en dos regiones de Chile

2013; SciELO; Volume: 30; Issue: 4 Linguagem: Inglês

10.4067/s0716-10182013000400006

0717-6341

Katia Abarca, Javier López, Gerardo Acosta‐Jamett, Constanza Martínez-Valdebenito,

Insect symbiosis and bacterial influences

Detection of Rickettsia andeanae in two regions of ChileIntroduction: Candidatus 'Rickettsia andeanae' is recently recognized specie, with no attributed pathogenic role so far.It has been reported in Amblyomma ticks from Peru, USA and Argentina, and recently in Chile, in one specimen of Amblyomma triste from a rural locality in Arica.Objective: To determine the presence of rickettsial agents in ticks from domestic dogs from two Chilean regions.Methods: A transversal descriptive study in Coquim bo and La Araucanía regions, consisted in households sampling in the cities of Coquimbo and Angol and nearby rural localities, in springsummer 20112012.One dog per house was examined and ticks were collected when present; after taxonomic identification, gltA and ompA genes were amplified and sequenced.Results: 462 dogs were examined, 255 had ticks (55%).In the cities just Rhipicephalus sanguineus was found; in rural localities also Amblyomma tigrinum.Obtained sequences in 12 specimens from A. tigrinum corresponded to Candidatus 'Rickettsia andeanae'.Conclusions: We documented the presence of R. andeanae in two distant Chilean regions, which is added to its recently finding in the Northern extreme of the country.This new rickettsial agent limits to Amblyomma ticks and rural areas, as it was reported in other American countries and corresponds with this tick habitat.