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Ticks Tick Borne Dis. 2013 Feb;4(1-2):145-7. doi: 10.1016/j.ttbdis.2012.07.001. Epub 2012 Aug 10.

A Rickettsia parkeri-like agent infecting Amblyomma calcaratum nymphs from wild birds in Mato Grosso do Sul, Brazil.

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Departamento de Medicina Veterinaria Preventiva e Saude Animal, Faculdade de Medicina Veterinaria e Zootecnia, Universidade de São Paulo, São Paulo, Brazil.


In total, 142 birds, mostly passerines, belonging to 42 species were examined for the presence of ticks in 3 locations in Mato Grosso do Sul Brazil during 2006. Seven birds (5%) were infested with 4 nymphs of Amblyomma calcaratum (Ramphocelus carbo, 3 infested/12 examined) and 5 larvae of Amblyomma sp. (Furnarius rufus, 2/5; Turdus leucomelas, 1/6; and Paroaria capitata, 1/8). All 4 nymphs of A. calcaratum tested by polymerase chain reaction targeting rickettsial genes gltA and ompA and by amplicon sequencing were found to be infected with a Rickettsia sp. strain NOD, a Rickettsia parkeri-like agent. A. calcaratum infected with a rickettsial bacterium was found for the first time.

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