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hepatozoon canis infection associated with dog ticks of rural areas of rio de janeiro state, brazil.hepatozoon canis is a tick-borne protozoan that infects dogs and has been reported throughout the world. manifestation of h. canis infection varies from being sub-clinical in apparently healthy dogs to severe illness. the main vector of the infection is the dog tick, rhipicephalus sanguineus although other species may also transmit this agent. h. canis has been reported previously in brazil, but mostly as an occasional finding during laboratory exams and always associated with other diseases. th ...200111113545
evidence of spotted fever group rickettsiae in state of rio de janeiro, brazil.ticks were obtained from dogs from february to september of 1999 at weekly intervals, in the county of piraí, state of rio de janeiro. four hundred seventy four ixodids were taxonomically identified, 103 amblyomma cajennense, seven amblyomma ovale, 209 rhipicephalus sanguineus, and 155 amblyomma sp. an hemolymph test associated with giemsa's stain revealed two specimens in 163 ticks tested (r. sanguineus and amblyomma sp), containing rickettsia-like organisms. direct immunofluorescence verified ...200212163909
[mutagenic occurrence in teleoginae of rhipicephalus sanguineus from intradomiciliary environment at rio de janeiro city].from material collected by into a residence house at rio de janeiro city, using an aspirator machine during four continues hours in all house, it was captured 1,284 rhipicephalus sanguineus including 289 females; one of them showed a mutagenic alteration like an asymmetry of opistosome, and monstrosity like a two anus. the first register of this phenomenon in r. sanguineus is reported.200919602319
rickettsia spp. infection in rhipicephalus sanguineus ticks in a brazilian spotted fever endemic rural area in rio de janeiro state, brazil. 200920584167
rickettsia rickettsii, rickettsia felis and rickettsia sp. twkm03 infecting rhipicephalus sanguineus and ctenocephalides felis collected from dogs in a brazilian spotted fever focus in the state of rio de janeiro/brazil. 200919298400
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