| introduction of potential heartwater vectors and other exotic ticks into florida on imported reptiles. | following the discovery of establishment of the african tortoise tick amblyomma marmoreum in florida, the present study was undertaken to determine the extent of introduction of exotic ticks into florida on imported reptiles. exotic ticks were identified on 29 (91%) of 32 reptile premises in 18 counties of florida. the ticks, found on a variety of imported tortoises, snakes, and monitor lizards, belonged to 4 amblyomma species (a. marmoreum, amblyomma nuttalli, amblyomma sabanerae, and amblyomma ... | 2000 | 10958443 |
| birds disperse ixodid (acari: ixodidae) and borrelia burgdorferi-infected ticks in canada. | a total of 152 ixodid ticks (acari: ixodidae) consisting of nine species was collected from 82 passerine birds (33 species) in 14 locations in canada from 1996 to 2000. the lyme disease spirochete borrelia burgdorferi johnson, schmidt, hyde, steigerwaldt & brenner was cultured from the nymph of a blacklegged tick, ixodes scapularis say, that had been removed from a common yellowthroat, geothlypis trichas l., from bon portage island, nova scotia. as a result of bird movement, a nymphal i. scapula ... | 2001 | 11476328 |
| rickettsia bellii infecting amblyomma sabanerae ticks in el salvador. | four amblyomma sabanerae ticks collected from a turtle (kinosternon sp.) in san miguel, el salvador, were found by molecular analysis to be infected by rickettsia bellii. we provide the first report of rickettsia bellii in central america, and the first report of a rickettsia species in el salvador. | 2012 | 23265378 |
| vector potential and population dynamics for amblyomma inornatum. | we studied the natural life cycle of amblyomma inornatum and its vector potential in south texas. this tick is distributed throughout south texas and most of central america. a. inornatum represented 1.91% of the ticks collected by carbon dioxide traps during a study of free-living ticks in the tamaulipan biotic province in south texas. the life cycle of a. inornatum in south texas showed a clear seasonal pattern consistent with one generation per year. nymphs emerged in the spring with a peak i ... | 2015 | 25881916 |
| 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 |
| host body size and the diversity of tick assemblages on neotropical vertebrates. | identifying the factors that influence the species diversity and distribution of ticks (acari: ixodida) across vertebrate host taxa is of fundamental ecological and medical importance. host body size is considered one of the most important determinants of tick abundance, with larger hosts having higher tick burdens. the species diversity of tick assemblages should also be greater on larger-bodied host species, but empirical studies testing this hypothesis are lacking. here, we evaluate this rela ... | 2016 | 27812506 |
| ticks and rickettsiae from wildlife in belize, central america. | the agents of spotted fevers in latin america are rickettsia rickettsii, r. parkeri, rickettsia sp. strain atlantic rainforest, and r. massiliae. in continental central america, r. rickettsii remains the only known pathogenic tick-borne rickettsia. in the present study, ticks were collected from wild mammals in natural areas of belize. besides providing new data of ticks from belize, we investigated rickettsial infection in some of these ticks. our results provide ticks harboring rickettsial age ... | 2016 | 26831147 |
| questing amblyomma mixtum and haemaphysalis juxtakochi (acari: ixodidae) infected with candidatus "rickettsia amblyommii" from the natural environment in panama canal basin, panama. | this work emphasizes the detection of candidatus "rickettsia amblyommii" in questing haemaphysalis juxtakochi and amblyomma mixtum. from february 2009 to december 2012, questing ticks were collected from the vegetation and leaf-litter of four protected forests and two grassy areas around the panama canal basin. dna was extracted from amblyomma mixtum, amblyomma naponense, amblyomma oblongoguttatum, amblyomma pecarium, amblyomma tapirellum, haemaphysalis juxtakochi, and unidentified immature ambl ... | 2015 | 26865823 |
| haemogregarine infections of three species of aquatic freshwater turtles from two sites in costa rica. | twenty-five black river turtles (rhinoclemmys funerea) and eight white-lipped mud turtles (kinosternon leucostomum) from selva verde, costa rica were examined for haemoparasites. leeches identified as placobdella multilineata were detected on individuals from both species. all turtles sampled were positive for intraerythrocytic haemogregarines (apicomplexa:adeleorina) and the average parasitemia of black river turtles (0.34% ± 0.07) was significantly higher compared to white-lipped mud turtles ( ... | 2013 | 24533326 |
| incubation environment affects immune system development in a turtle with environmental sex determination. | the developmental environment can have lasting effects on posthatching phenotype in oviparous animals. innate immune response is one important component of fitness in vertebrates because it provides a generalized defense against infection. in addition, because male vertebrates are at a higher risk of infection than females, males may benefit more from increased innate immunity than females. we determined the effects of incubation temperature on the innate immune response of hatchling map turtles ... | 0 | 20300480 |
| detection of rickettsiae in fleas and ticks from areas of costa rica with history of spotted fever group rickettsioses. | outbreaks of spotted fevers have been reported in costa rica since the 1950s, although vectors responsible for transmission to humans have not been directly identified. in this study, species of rickettsia were detected in ectoparasites from costa rica, mostly from five study sites where cases of spotted fevers have been reported. ticks and fleas were collected using drag cloths or directly from domestic and wild animals and pooled according to species, host, and location. pools were analyzed in ... | 2016 | 27592065 |
| bacteria of the genus rickettsia in ticks (acari: ixodidae) collected from birds in costa rica. | the aim of this study was to document the presence of rickettsia spp. in ticks parasitizing wild birds in costa rica. birds were trapped at seven locations in costa rica during 2004, 2009, and 2010; then visually examined for the presence of ticks. ticks were identified, and part of them was tested individually for the presence of rickettsia spp. by polymerase chain reaction (pcr) using primers targeting fragments of the rickettsial genes glta and ompa. pcr products were dna-sequenced and analyz ... | 2015 | 25869035 |