| rickettsial agents in avian ixodid ticks in northeast brazil. | birds are important in the maintenance and spread of ticks and tick-borne diseases. in this context we screened birds in the atlantic forest north of the são francisco river and caatinga in northeast brazil. in the atlantic forest amblyomma longirostre, amblyomma nodosum, amblyomma varium and amblyomma auricularium were identified. a. longirostre was infected by "candidatus rickettsia amblyommii" and a. nodosum by a rickettsia parkeri-like agent. in caatinga, amblyomma parvum and a. auricularium ... | 2015 | 25800099 |
| rickettsial infection in ticks from wild birds from cerrado and the pantanal region of mato grosso, midwestern brazil. | the involvement of different species of ticks and wild animals, such as birds, play an important role in the epidemiology of tick-borne diseases. birds may serve as reservoirs for some tick-borne diseases, and may carry and spread hematophagous ectoparasites mechanically. this study aimed to show the diversity of ticks on birds and molecular detection of rickettsial infection in ticks from pantanal and cerrado, two similar brazilian biomes characterized by hydrological seasons. during two years, ... | 2015 | 26232933 |
| molecular detection of rickettsia rhipicephali and other spotted fever group rickettsia species in amblyomma ticks infesting wild birds in the state of minas gerais, brazil. | the current study evaluated parasitism of wild birds by ticks in a fragment of atlantic forest in the state of minas gerais, brazil, and examined the ticks for rickettsial agents. birds were captured during 2014 and 2015 and ticks were identified by sequencing fragments of the 16s and 12s ribosomal dna. among 260 birds representing 19 families and 52 species, a total of 69 (26.5%) were found to be infested by larvae (ll) and/or nymphs (nn) of amblyomma longirostre (koch, 1844) (45 ll, 4 nn), amb ... | 2017 | 27745888 |
| ecology of a tick-borne spotted fever in southern brazil. | rio grande do sul is the southernmost state of brazil, bordering uruguay. clinical cases of spotted fever group (sfg) rickettsiosis were recently reported in rio grande do sul. none of these cases was lethal, and all were confirmed by seroconversion to r. rickettsii antigens. because serological cross-reactions are well known to occur between different sfg agents, the sfg agent responsible for the clinical cases remains unknown in rio grande do sul, where no rickettsial agent is known to infect ... | 2016 | 27392739 |
| rickettsial infection in ticks (acari: ixodidae) collected on birds in southern brazil. | the aim of the study was to evaluate rickettsial infection in ticks from wild birds of the semidecidual and atlantic rainforest remnants of three municipalities of the state of paraná, southern brazil. overall, 53 larvae and nymphs collected from birds were checked for the presence of rickettsia dna by molecular tests. five tick species were tested: amblyomma aureolatum (pallas), amblyomma calcaratum neumann, amblyomma longirostre (koch), amblyomma ovale koch, and amblyomma parkeri fonseca and a ... | 2012 | 22679880 |
| spotted fever group rickettsia infecting ticks (acari: ixodidae) in the state of santa catarina, brazil. | during 2006-2008, a total of 260 adult ticks were collected from domestic and wild animals in different regions of the state of santa catarina (sc), brazil, including areas where human cases of brazilian spotted fever have been reported. collected ticks belonging to nine species (amblyomma aureolatum, amblyomma cajennense, amblyomma dubitatum, amblyomma longirostre, amblyomma ovale, amblyomma tigrinum, dermacentor nitens, rhipicephalus microplus and rhipicephalus sanguineus) were tested by polym ... | 2011 | 22241112 |