| rickettsia amblyommii infecting amblyomma sculptum in endemic spotted fever area from southeastern brazil. | the rickettsia bacteria include the aetiological agents for the human spotted fever (sf) disease. in the present study, a sf group rickettsia amblyommii related bacterium was detected in a field collected amblyomma sculptum (amblyomma cajennense species complex) tick from a brazilian sf endemic site in southeastern brazil, in the municipality of juiz de fora, state of minas gerais. genetic analysis based on genes ompa,ompb and htra showed that the detected strain, named r. amblyommii str. jf, is ... | 2015 | 26676317 |
| 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 |
| amblyomma sculptum: genetic diversity and rickettsias in the brazilian cerrado biome. | amblyomma sculptum (ixodida: ixodidae) berlese, 1888 is the most important tick vector in brazil, transmitting the bioagent of the most severe form of spotted fever (sf) in part of the cerrado (in the states of minas gerais and são paulo). in another part of the cerrado (central-west region of brazil), a milder form of sf has been recorded. however, neither the rickettsia nor the vector involved have been characterized. the aim of the current study was to analyse genetic variation and the presen ... | 2017 | 28752684 |