| ticks (acari: ixodidae) infesting wild birds in an atlantic forest area in the state of são paulo, brazil, with isolation of rickettsia from the tick amblyomma longirostre. | during field work in nazaré paulista, state of são paulo, brazil, we found 13 (56.5%) of 23 birds (mostly passeriformes) to be infested by 28 larvae and 1 nymph of amblyomma spp. two larvae were reared to the adult stage, being taxonomically identified as amblyomma parkeri fonseca and aragio, whereas five larvae and one nymph were identified as amblyomma longirostre koch. all six a. longirostre specimens were shown to be infected by rickettsia, as demonstrated by polymerase chain reaction (pcr) ... | 2008 | 18714882 |
| update on tick-borne rickettsioses around the world: a geographic approach. | tick-borne rickettsioses are caused by obligate intracellular bacteria belonging to the spotted fever group of the genus rickettsia. these zoonoses are among the oldest known vector-borne diseases. however, in the past 25 years, the scope and importance of the recognized tick-associated rickettsial pathogens have increased dramatically, making this complex of diseases an ideal paradigm for the understanding of emerging and reemerging infections. several species of tick-borne rickettsiae that wer ... | 0 | 24092850 |
| 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 |
| ticks (acari: ixodidae) infesting wild birds in the atlantic forest in northeastern brazil, with notes on rickettsial infection in ticks. | a total of 232 individuals representing 46 species of birds were mist-netted and screened for ticks in a region of the atlantic forest, state of bahia, brazil. thirty-eight (16.4%) of these birds representing 17 species were found infested by immature stages of amblyomma ticks, namely, amblyomma longirostre (koch, 1844) (15 larvae and seven nymphs), amblyomma nodosum (neumann, 1899) (nine nymphs), amblyomma calcaratum (neumann, 1899) (five nymphs), amblyomma cajennense (fabricius, 1787) (seven l ... | 2010 | 20953629 |
| redescription of the female, description of the male, and several new records of amblyomma parkeri (acari: ixodidae), a south american tick species. | the tick amblyomma parkeri fonseca and aragão was described in 1952, based on female and immature ticks collected in the states of são paulo and santa catarina, brazil. thereafter, there has been no further report of a. parkeri, and the male has remained unknown. herein, we examined ticks collected on porcupines from a locality in the state of são paulo. some of the ticks were identified as amblyomma longirostre (koch, 1844), whereas others as a. parkeri, including male specimens, for which we p ... | 2009 | 19241123 |
| comments on controversial tick (acari: ixodida) species names and species described or resurrected from 2003 to 2008. | there are numerous discrepancies in recent published lists of the ticks of the world. here we review the controversial names, presenting evidence for or against their validity and excluding some altogether. we also address spelling errors and present a list of 17 species described or resurrected during the years 2003-2008. we consider the following 35 tick species names to be invalid: argas fischeri audouin, 1826, ornithodoros boliviensis kohls and clifford, 1964, ornithodoros steini (schulze, 1 ... | 2009 | 19169832 |
| morphological description of the nymphal stage of amblyomma geayi and new nymphal records of amblyomma parkeri. | the external morphology of the nymph of amblyomma geayi neumann is described by optical and scanning electron microscopy. unfed nymphs were obtained from an engorged a. geayi female, which had been collected on a sloth (bradypus variegatus) from belém municipality, state of pará, northern brazil, and was kept under laboratory conditions. with the present description, we propose a modification of a taxonomic key published in 2010 for the amblyomma nymphs that occur in brazil, through the inclusio ... | 2013 | 23414796 |
| association patterns of ticks (acari: ixodida: ixodidae, argasidae) of small mammals in cerrado fragments, western brazil. | the present study describes ticks associated with small mammals and analyzes the aggregation patterns according to seasonal and host variations in the cerrado biome, central-western brazil. small mammals were systematically captured in 54 woodland fragments from february 2012 to july 2013. a total of 1,040 animals belonging to eight marsupial and 12 rodent species were captured; 265 animals were parasitized by eight tick species (in decreasing order of abundance): ornithodoros mimon, amblyomma c ... | 2015 | 25633262 |
| rickettsial infection in ticks (acari: ixodidae) of wild animals in midwestern brazil. | ticks collected in the last two decades from free-living and captive wild animals from 28 municipalities of the brazilian state of mato grosso were identified and tested using molecular methods for the presence of rickettsial agents. a total of 4467 ticks (229 larvae, 1676 nymphs, 1565 males, 997 females) representing 27 ixodid species were collected from 235 species of amphibians, reptiles, birds, and mammals from three different ecoregions (pantanal, cerrado, and amazonia). the species amblyom ... | 2016 | 26775021 |
| 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 |