| haemaphysalis juxtakochi, ixodes pararicinus (ixodidae) and otobius megnini (argasidae) in relation to the phytogeography of argentina. | the phytogeographical distributions of haemaphysalis juxtakochi, ixodes pararicinus and otobius megnini in argentina are described from material collected mainly from 1978 to the present. h. juxtakochi was found in the northwestern area of the amazonian domain and in the chaco, espinal and pampean provinces of the chaco domain. it was detected on mazama spp., tapirus terrestris, dog, cattle and on the vegetation. most findings of i. pararicinus were from mountain rangeland, where it was found on ... | 1992 | 1290380 |
| haemaphysalis juxtakochi cooley (acari: ixodidae), a neotropical tick species, found in ohio. | haemaphysalis juxtakochi cooley, 1946, an ectoparasite of deer and other large mammals from mexico southward through central and south america, was recovered from the ear of a white-tailed deer, odocoileus virginanus zimmermann, in ohio. this represents the first record of h. juxtakochi from the united states. | 1993 | 8271252 |
| detection of a spotted fever group rickettsia in the tick haemaphysalis juxtakochi in rondonia, brazil. | the tick genus haemaphysalis is represented by four species in the new world, of which only the species haemaphysalis leporispalustris has been associated with rickettsiae. the present study reports for the first time the presence of a rickettsia strain in the tick haemaphysalis juxtakochi. a free-living male of h. juxtakochi, collected in the state of rondonia, western amazon, brazil, was subjected to dna extraction and tested by pcr targeting the four rickettsial genes: glta, 17-kda, ompa and ... | 2004 | 15631911 |
| a collection of ticks (ixodidae) from wild birds in uruguay. | thirty nine wild birds from seven families (alcedinidae, emberizidae, furnariidae, parulidae, trochilidae, turdidae and tyrannidae) were caught from 4 to 7 of february, 2004 at rincón da vassoura (31 degrees 15' s 56 degrees 03' w) department of tacuarembó, uruguay. ninety one nymphs and forty one larvae of ixodidae were recovered from them. the majority of ticks were conventionally identified but 16s mitochondrial rdna sequences were obtained for larvae and nymphs of amblyomma with uncertain sp ... | 2005 | 16132744 |
| tick-borne rickettsioses around the world: emerging diseases challenging old concepts. | during most of the 20th century, the epidemiology of tick-borne rickettsioses could be summarized as the occurrence of a single pathogenic rickettsia on each continent. an element of this paradigm suggested that the many other characterized and noncharacterized rickettsiae isolated from ticks were not pathogenic to humans. in this context, it was considered that relatively few tick-borne rickettsiae caused human disease. this concept was modified extensively from 1984 through 2005 by the identif ... | 2005 | 16223955 |
| isolation of rickettsia rhipicephali and rickettsia bellii from haemaphysalis juxtakochi ticks in the state of são paulo, brazil. | in the present study, attempts to isolate rickettsia in cell culture were performed individually in seven specimens of haemaphysalis juxtakochi ticks collected in the state of são paulo (southeastern brazil). rickettsia was successfully isolated by the shell vial technique and established in vero cell culture from six ticks (six isolates). dna extracted from infected cells of these isolates was tested by pcr and dna sequencing, using genus-specific rickettsia primers targeting the genes glta, ht ... | 2007 | 17142361 |
| the ticks (acari: ixodida: argasidae, ixodidae) of paraguay. | the ticks reported in paraguay, which are here reviewed, can be categorized as 'endemic or established' (argas persicus or a sibling species, ornithodoros hasei, o. rostratus, o. rudis, o. talaje/o. puertoricensis, amblyomma aureolatum, am. auricularium, am. brasiliense, am. cajennense, am. calcaratum, am. coelebs, am. dissimile, am. dubitatum, am. incisum, am. longirostre, am. nodosum, am. ovale, am. pacae, am. parvum, am. pseudoconcolor, am. rotundatum, am. scutatum, am. tigrinum, am. triste, ... | 2007 | 17362600 |
| [haemaphysalis juxtakochi cooley, 1946 (acari: ixodidae) parasitizing mazama nana (hensel, 1872) (artiodactyla: cervidae) in the state of rio grande do sul]. | the record of haemaphysalis juxtakochi cooley, an ixodid tick, on the brocket deer, mazama nana (hensel), represents a new report after 34 years of its last report in the state of rio grande do sul. the tick specimens (three males and one female) were found in cachoeira do sul, rs (30 degrees 02'21''s, 52 degrees 53'38''w). this place is elevated 72 m sea above, with an annual average temperature of 18.8 degrees c, and annual average rainfall of 1.438 mm. this is the first record of this tick sp ... | 2007 | 18078606 |
| ecological aspects of the free-living ticks (acari: ixodidae) on animal trails within atlantic rainforest in south-eastern brazil. | in a recent ecological study of the ticks on animal trails within an area of atlantic rainforest in south-eastern brazil, amblyomma aureolatum, a. brasiliense, a. incisum, a. ovale and haemaphysalis juxtakochi were found questing on the vegetation. most of the ticks recorded by a small, man-made dam on the forest border were a. dubitatum but a few a. brasiliense and a. cajennense, one a. incisum and one h. juxtakochi were also found. the seasonal activity of the ticks indicated that a. incisum a ... | 2009 | 19173777 |
| allopatric speciation in ticks: genetic and reproductive divergence between geographic strains of rhipicephalus (boophilus) microplus. | the cattle tick, rhipicephalus (boophilus) microplus, economically impact cattle industry in tropical and subtropical regions of the world. the morphological and genetic differences among r. microplus strains have been documented in the literature, suggesting that biogeographical and ecological separation may have resulted in boophilid ticks from america/africa and those from australia being different species. to test the hypothesis of the presence of different boophilid species, herein we perfo ... | 2009 | 19243585 |
| host-cell interactions with pathogenic rickettsia species. | pathogenic rickettsia species are gram-negative, obligate intracellular bacteria responsible for the spotted fever and typhus groups of diseases around the world. it is now well established that a majority of sequelae associated with human rickettsioses are the outcome of the pathogen's affinity for endothelium lining the blood vessels, the consequences of which are vascular inflammation, insult to vascular integrity and compromised vascular permeability, collectively termed 'rickettsial vasculi ... | 2009 | 19327117 |
| ticks (acari: ixodidae) infesting wild birds in the eastern amazon, northern brazil, with notes on rickettsial infection in ticks. | the aim of the study was to report tick infestations on wild birds in a region of the eastern brazilian amazon and evaluate the rickettsial infection of these ticks. wild birds captured by mist nets were examined for the presence of ticks, which were collected and identified to species by morphology or molecular methods. in addition, part of these ticks was individually tested by polymerase chain reaction targeting portions of the rickettsial genes glta and ompa. among 331 captured birds, repres ... | 2010 | 20140452 |
| ticks species (ixodida) in the summit municipal park and adjacent areas, panama city, panama. | from september 2007 to september 2009, we studied the species of ticks present in the summit municipal park. ticks were extracted from zoo animals, free-living wild mammals and reptiles trapped, dead mammals on the roads and environment (ground and zoo burrows). a total of 2,649 ticks were collected: 2,167 immature stages (1,345 larvae and 822 nymphs) and 482 adults. seventeen species were identified: ornithodoros puertorricensis (argasidae), amblyomma auricularium, a. cajennense, a. calcaratum, ... | 2010 | 20585838 |
| survey of ticks (acari: ixodidae) and their rickettsia in an atlantic rain forest reserve in the state of são paulo, brazil. | the current study investigated the occurrence of ticks and their rickettsiae in the serra do mar state park, which encompasses one of the largest atlantic rain forest reserves of brazil. from july 2008 to june 2009, a total of 2439 ticks (2,196 free living and 243 collected on hosts) was collected, encompassing the following 13 species: amblyomma aureolatum (pallas), amblyomma brasiliense aragao, amblyomma dubitatum neumann, amblyomma fuscum neumann, amblyomma incisum neumann, amblyomma longiros ... | 2010 | 20939390 |
| new tick records in rondônia, western brazilian amazon. | in the present study, we provide new tick records from vilhena municipality, in the southeast of the state of rondônia, northern brazil. ticks collected from a capybara, hydrochoerus hydrochaeris (linnaeus), were identified as amblyomma romitii tonelli-rondelli (1 female), and amblyomma sp. (1 larva). ticks collected from a harpy eagle, harpia harpyja (linnaeus), were identified as amblyomma cajennense (fabricius) (16 nymphs) and haemaphysalis juxtakochi cooley (1 nymph). ticks collected from a ... | 2010 | 20943027 |
| 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 |
| 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 |
| synanthropic mammals as potential hosts of tick-borne pathogens in panama. | synanthropic wild mammals can be important hosts for many vector-borne zoonotic pathogens. the aim of this study was determine the exposure of synanthropic mammals to two types of tick-borne pathogens in panama, spotted fever group rickettsia (sfgr) and borrelia relapsing fever (rf) spirochetes. one hundred and thirty-one wild mammals were evaluated, including two gray foxes, two crab-eating foxes (from zoos), four coyotes, 62 opossum and 63 spiny rats captured close to rural towns. to evaluate ... | 2017 | 28060928 |
| 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 |
| host specificity in a diverse neotropical tick community: an assessment using quantitative network analysis and host phylogeny. | host specificity is a fundamental determinant of tick population and pathogen transmission dynamics, and therefore has important implications for human health. tick host specificity is expected to be particularly high in the tropics, where communities of ticks, hosts and pathogens are most diverse. yet the degree to which tropical tick species are host-specific remains poorly understood. combining new field data with published records, we assessed the specificity of tick-host associations in pan ... | 2016 | 27357506 |
| 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 |
| dogs, cats, parasites, and humans in brazil: opening the black box. | dogs and cats in brazil serve as primary hosts for a considerable number of parasites, which may affect their health and wellbeing. these may include endoparasites (e.g., protozoa, cestodes, trematodes, and nematodes) and ectoparasites (i.e., fleas, lice, mites, and ticks). while some dog and cat parasites are highly host-specific (e.g., aelurostrongylus abstrusus and felicola subrostratus for cats, and angiostrongylus vasorum and trichodectes canis for dogs), others may easily switch to other h ... | 2014 | 24423244 |
| molecular ecological insights into neotropical bird-tick interactions. | in the tropics, ticks parasitize many classes of vertebrate hosts. however, because many tropical tick species are only identifiable in the adult stage, and these adults usually parasitize mammals, most attention on the ecology of tick-host interactions has focused on mammalian hosts. in contrast, immature neotropical ticks are often found on wild birds, yet difficulties in identifying immatures hinder studies of birds' role in tropical tick ecology and tick-borne disease transmission. in panama ... | 2016 | 27203693 |
| importation of exotic ticks and tick-borne spotted fever group rickettsiae into the united states by migrating songbirds. | birds are capable of carrying ticks and, consequently, tick-transmitted microorganisms over long distances and across geographical barriers such as oceans and deserts. ticks are hosts for several species of spotted fever group rickettsiae (sfgr), which can be transmitted to vertebrates during blood meals. in this study, the prevalence of this group of rickettsiae was examined in ticks infesting migratory songbirds by using polymerase chain reaction (pcr). during the 2009 and 2010 spring migratio ... | 2013 | 24252263 |
| detection of rickettsia bellii and rickettsia amblyommii in amblyomma longirostre (acari: ixodidae) from bahia state, northeast brazil. | studies investigating rickettsial infections in ticks parasitizing wild animals in the northeast region of brazil have been confined to the detection of rickettsia amblyommii in immature stages of amblyomma longirostre collected from birds in the state of bahia, and in immatures and females of amblyomma auricularium collected from the striped hog-nosed skunk (conepatus semistriatus) and armadillos (euphractus sexcinctus) in the state of pernambuco. the current study extends the distribution of r ... | 2015 | 26413074 |
| amblyomma tapirellum (acari: ixodidae) collected from tropical forest canopy. | free-ranging ticks are widely known to be restricted to the ground level of vegetation. here, we document the capture of the tick species amblyomma tapirellum in light traps placed in the forest canopy of barro colorado island, central panama. a total of forty eight adults and three nymphs were removed from carbon dioxide-octenol baited cdc light traps suspended 20 meters above the ground during surveys for forest canopy mosquitoes. to our knowledge, this represents the first report of questing ... | 2013 | 25075277 |
| comparative growth of spotted fever group rickettsia spp. strains in vero cells. | in brazil, the spotted fever group (sfg) rickettsia rickettsii and rickettsia parkeri related species are the etiological agents of spotted fever rickettsiosis. however, the sfg, rickettsia rhipicephali, that infects humans, has never been reported. the study of growth dynamics can be useful for understanding the infective and invasive capacity of these pathogens. here, the growth rates of the brazilian isolates r. rickettsii str. taiaçu, r. parkeri str. at#24, and r. rhipicephali hj#5, were eva ... | 0 | 27508322 |
| bacteria of the genera ehrlichia and rickettsia in ticks of the family ixodidae with medical importance in argentina. | the aim of this study was to get an overview about the occurrence of bacteria from the genus ehrlichia and rickettsia in ixodid ticks with medical importance in argentina. therefore, in 2013 and 2014, free-living ticks were collected in different provinces of northern argentina. these ticks were determined as amblyomma sculptum, amblyomma neumanni, amblyomma parvum, amblyomma triste, amblyomma ovale, amblyomma tonelliae and haemaphysalis juxtakochi. all samples were tested to determine the infec ... | 2017 | 27812828 |
| rickettsial infection in ticks infesting wild birds from two eco-regions of argentina. | several tick-borne rickettsia species are recognized human pathogens in argentina. here we evaluated rickettsial infection in ticks collected on passerine birds during 2011-2012 in two eco-regions of argentina. the ticks were processed by molecular analysis through polymerase chain reaction (pcr) detection and dna sequencing of fragments of two rickettsial genes, glta and ompa. a total of 594 tick specimens (532 larvae and 62 nymphs), representing at least 4 species (amblyomma tigrinum, ixodes p ... | 2016 | 27580393 |
| ticks and rickettsial infection in the wildlife of two regions of the brazilian amazon. | during 2009-2012, wild animals and their ticks were sampled in two areas within the amazon biome of brazil, in the states of mato grosso and pará. animal tissues, blood, and ticks were molecularly tested for rickettsia and coxiella dna. a total of 182 wild animals were sampled, comprising 28 mammalian, five avian, and three reptilian species. animal tissues or blood were all negative for rickettsia or coxiella dna. a total of 454 ticks (22 larvae, 226 nymphs, 127 males, 79 females) were collecte ... | 2015 | 25273064 |
| high prevalence of "candidatus rickettsia amblyommii" in amblyomma ticks from a spotted fever endemic region in north argentina. | ticks from an endemic spotted fever region in argentina were analysed by pcr for spotted fever group rickettsiae. dna of "candidatus rickettsia amblyommii" was found in 21.3% of amblyomma hadanii and in 44.0% of a. neumanni. amblyomma sculptum (formerly a. cajennense) and haemaphysalis juxtakochi were negative for rickettsial dna. dna of rickettsia rickettsii, the etiological agent of the clinical cases reported within the studied region was not detected in the analysed sample. | 2016 | 27260814 |
| the ticks (acari: ixodida: argasidae, ixodidae) of bolivia. | the tick species reported in bolivia are reviewed here as (1) endemic or established: ornithodoros echimys, o. guaporensis, o. hasei, o. kohlsi, o. mimon, o. peropteryx, o. rostratus, otobius megnini, amblyomma auricularium, a. cajennense, a. calcaratum, a. coelebs, a. dubitatum, a. humerale, a. incisum, a. longirostre, a. naponense, a. nodosum, a. oblongoguttatum, a. ovale, a. parvitarsum, a. parvum, a. pecarium, a. pseudoconcolor, a. rotundatum, a. scalpturatum, a. tigrinum, a. triste, dermace ... | 2014 | 24406053 |
| ticks infesting humans in northern misiones, argentina. | this work presents records of ticks infesting humans in northern misiones province, argentina. also, notes on potential transmission of tick-borne pathogens are included. a total of 282 ticks attached to researchers were collected and identified by their morphological characters. eight tick species were found: amblyomma brasiliense, amblyomma coelebs, amblyomma dubitatum, amblyomma incisum, amblyomma ovale, haemaphysalis juxtakochi, rhipicephalus sanguineus and rhipicephalus microplus. some of t ... | 2016 | 27135846 |
| ticks (ixodida) on humans from central panama, panama (2010-2011). | from january 2010 to december 2011, a total of 138 cases of ticks feeding on humans were reported from 11 locations in central panama. five of these locations were situated in forest environments, three in rural landscapes and three in urban areas. the ticks were submitted to the gorgas memorial institute, where nine species were identified among 65 specimens: amblyomma cajennense s.l., a. dissimile, a. naponense, a. oblongoguttatum, a. ovale, a. sabanerae, a. tapirellum, haemaphysalis juxtakoch ... | 2012 | 22544074 |
| ticks (acari: ixodidae) on wild birds in north-central argentina. | ixodid ticks were collected from wild birds in five ecoregions in north-central argentina, namely: selva de las yungas, esteros del iberá, delta e islas del paraná, selva paranaense and chaco seco. a total of 2199 birds belonging to 139 species, 106 genera, 31 families and 11 orders were captured, but ticks were collected only from 121 birds (prevalence=5.5%) belonging to 39 species (28.1%) and three orders: tinamiformes (tinamidae) and falconiformes (falconidae) in selva de las yungas and passe ... | 2014 | 25108788 |
| rickettsia amblyommatis infecting ticks and exposure of domestic dogs to rickettsia spp. in an amazon-cerrado transition region of northeastern brazil. | this study was performed in maranhão state, a transition area two brazilian biomes, amazon and cerrado. during 2011-2013, 1,560 domestic dogs were sampled for collection of serum blood samples and ticks in eight counties (3 within the amazon and 5 within the cerrado). a total of 959 ticks were collected on 150 dogs (9.6%). rhipicephalus sanguineus sensu lato (s.l.) was the most abundant tick (68% of all collected specimens), followed by amblyomma cajennense sensu lato (s.l.) (12.9%), amblyomma p ... | 2017 | 28594882 |
| ticks infesting cattle and humans in the yungas biogeographic province of argentina, with notes on the presence of tick-borne bacteria. | this study was performed to determine the tick species that infest cattle and humans throughout an altitudinal gradient in the yungas biogeographic province of argentina. the presence of tick-borne bacteria of the genera rickettsia, ehrlichia and borrelia in the collected ticks was also evaluated. samples of ticks parasitizing cattle and humans were carried out in different seasons. questing ticks (adults and nymphs) were collected from vegetation and analyzed to detect the presence of rickettsi ... | 2018 | 29380169 |