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- W580912810 abstract "ABSTRACT Protozoa of the genus Hepatozoon canis can infect dogs and they have as vector ticks Ixodidae. Epidemic data have been evidencing high prevalence of the infection caused by this parasite in Brazil, mainly in dogs of rural areas. Rhipicephalus sanguineus is a type of tick predominant in urban areas and described as vehicle of the H. canis. However, dogs of rural area that possibly share habitat with other domestic and wild hosts are infested mainly by species of the genus Amblyomma. Considering the high occurrence of dogs in rural areas infected with H. canis, associated to the presence of ticks of the genus Amblyomma, the objective of this project was to experimentally infect ticks Amblyomma cajennense, Amblyomma aureolatum and Amblyomma ovale, from dogs naturally infected by H. canis, and to research the vectorial capacity of the same ones, besides comparing the infection tax between the species A. ovale and A. cajennense with R. sanguineus. During the study, researches were accomplished for positive dogs by H. canis in dogs of rural and urban areas, demonstrating a high prevalence of the infections in dogs of rural areas. As methodology, positive dogs were infested with ticks and, to proceed, used for the oocysts research and for the experiments of vectorial capacity. The obtained results demonstrated that ticks A. ovale were able to infect and to transmit the protozoan for other dogs. For the species A. cajennense in spite of the positivity of the dogs infected during the research, we will need new transmission studies to verify the vectorial capacity of that ectoparasite. With A. aureolatum species we don t observed any evolutionary form of the H. canis in the analyzed specimens and no animal became positive after the oral inoculation. When we compared the infection rate for H. canis, in the different species of ticks, we verified that only the species A. ovale presented oocysts in the hemocele. With the obtained data we can conclude that ticks of the species A. ovale can be possible vectors of the H. canis in rural area dogs in Brazil and, with important epidemic paper in the transmission of this hemoparasite. We ended although ticks A. aureolatum seem not to be capable to acquire and to transmit the H. canis. The data obtained in this research will complement the studies of the area and the subjects about the vectorial capacity of ticks of the genus Amblyomma in the transmission of H. canis in rural areas in Brazil.Protozoa of the genus Hepatozoon canis can infect dogs and they have as vector ticks Ixodidae. Epidemic data have been evidencing high prevalence of the infection caused by this parasite in Brazil, mainly in dogs of rural areas. Rhipicephalus sanguineus is a type of tick predominant in urban areas and described as vehicle of the H. canis. However, dogs of rural area that possibly share habitat with other domestic and wild hosts are infested mainly by species of the genus Amblyomma. Considering the high occurrence of dogs in rural areas infected with H. canis, associated to the presence of ticks of the genus Amblyomma, the objective of this project was to experimentally infect ticks Amblyomma cajennense, Amblyomma aureolatum and Amblyomma ovale, from dogs naturally infected by H. canis, and to research the vectorial capacity of the same ones, besides comparing the infection tax between the species A. ovale and A. cajennense with R. sanguineus. During the study, researches were accomplished for positive dogs by H. canis in dogs of rural and urban areas, demonstrating a high prevalence of the infections in dogs of rural areas. As methodology, positive dogs were infested with ticks and, to proceed, used for the oocysts research and for the experiments of vectorial capacity. The obtained results demonstrated that ticks A. ovale were able to infect and to transmit the protozoan for other dogs. For the species A. cajennense in spite of the positivity of the dogs infected during the research, we will need new transmission studies to verify the vectorial capacity of that ectoparasite. With A. aureolatum species we don t observed any evolutionary form of the H. canis in the analyzed specimens and no animal became positive after the oral inoculation. When we compared the infection rate for H. canis, in the different species of ticks, we verified that only the species A. ovale presented oocysts in the hemocele. With the obtained data we can conclude that ticks of the species A. ovale can be possible vectors of the H. canis in rural area dogs in Brazil and, with important epidemic paper in the transmission of this hemoparasite. We ended although ticks A. aureolatum seem not to be capable to acquire and to transmit the H. canis. The data obtained in this research will complement the studies of the area and the subjects about the vectorial capacity of ticks of the genus Amblyomma in the transmission of H. canis in rural areas in Brazil." @default.
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- W580912810 date "2010-03-05" @default.
- W580912810 modified "2023-09-23" @default.
- W580912810 title "Infecção experimental de Amblyomma spp. (Acari: Ixodidae) com Hepatozoon canis (Apicomplexa: Hepatozoidae) de cães naturalmente infectados" @default.
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