Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
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| 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 species infecting amblyomma cooperi ticks from an area in the state of são paulo, brazil, where brazilian spotted fever is endemic. | owing to the potential role of the tick amblyomma cooperi in the enzootic cycle of rickettsia rickettsii, the etiologic agent of brazilian spotted fever (bsf), this study evaluated infection by rickettsia species in a. cooperi ticks collected from an area in brazil where bsf is endemic. among a total of 40 a. cooperi adult ticks collected in an area of bsf endemicity in the state of são paulo, pcr analysis detected dna of rickettsia bellii in 16 ticks (40%), and 3 other ticks (7.5%) were positiv ... | 2004 | 14715737 |
| molecular evidence for a spotted fever group rickettsia species in the tick amblyomma longirostre in brazil. | two amblyomma longirostre adult male ticks were collected from a brazilian porcupine coendou prehensilis l. in the state of rondonia, western amazon, brazil. the two ticks were pooled for dna extraction and tested for the presence of rickettsial dna by amplifying portions of the glta, 17-kda, ompa, and ompb rickettsial genes by polymerase chain reaction (pcr). portions of the four genes were amplified from the sample and subsequently sequenced. these results indicated the presence of a rickettsi ... | 2004 | 15185961 |
| 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 |
| description of the larva of amblyomma longirostre (koch,1844)(acari: ixodidae) by light and scanning electron microscopy. | the description of the larva of amblyomma longirostre (koch, 1844) is based on optical and scanning electron microscopy. larvae (f1) were obtained under laboratory conditions from an engorged a. longirostre female, which had been collected on a coendu prehensilis (linnaeus) (rodentia: erethizontidae) from the jaraguá mountain, são paulo municipality, state of são paulo, brazil. several characters are presented including the chaetotaxy of idiosoma, palps and haller's organ, campaniform sensillum ... | 2005 | 16153345 |
| 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 |
| topographical and numerical study of the idiosomal integumentary structures of the larva of four neotropical species of amblyomma koch, 1844 (acari: ixodidae). | integumentary structures of the larvae of amblyomma longirostre (koch, 1844), a. parvum aragão, 1908, a. rotundatum koch, 1844 and from three populations of a. cajennense (fabricius, 1787) were studied using light microscopy. a new nomenclature for the localisation of the integumentary structures is proposed. three types of integumentary structures were identified in the larval idiosoma of the four amblyomma species: lyrifissures, small glands and large wax glands. these structures were observed ... | 2007 | 17417718 |
| ticks collected on birds in the state of são paulo, brazil. | the present study reports a collection of amblyomma spp. ticks in birds from several areas of the state of são paulo, brazil. a total of 568 tick specimens (404 larvae, 164 nymphs) were collected from 261 bird specimens. from these ticks, 204 (36%) specimens (94 larvae, 110 nymphs) were reared to the adult stage, being identified as amblyomma longirostre (94 larvae, 90 nymphs), amblyomma calcaratum (13 nymphs), amblyomma nodosum (2 nymphs), and amblyomma cajennense (5 nymphs). additionally, 39 l ... | 2007 | 17882514 |
| 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 |
| new epidemiological data on brazilian spotted fever in an endemic area of the state of são paulo, brazil. | the present work evaluated rickettsial infection in dogs and their ticks in an area endemic for brazilian spotted fever (bsf) in the metropolitan area of são paulo, brazil, where the tick amblyomma aureolatum was presumed to be the vector of the disease. ticks were collected on dogs from 185 houses, encompassing single infestations by rhipicephalus sanguineus, amblyomma aureolatum, amblyomma longirostre, or amblyomma sp. in dogs from 60 (32.4%), 77 (41.6%), 2 (1.1%), and 25 (13.5%) houses, respe ... | 2008 | 18847319 |
| 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 |
| ticks on captive and free-living wild animals in northeastern brazil. | from 2005 to 2009, 147 ticks found on 32 wild animals from or referred to two zoobotanical parks (parque zoobotânico arruda câmara and parque estadual dois irmãos) located in northeastern brazil were identified. ticks found on two veterinarians working in one of the parks (i.e., parque estadual dois irmãos), after return from forested areas within the park's territory, were also identified. the following tick-host associations were recorded: amblyomma fuscum neumann on boa constrictor l.; amblyo ... | 2010 | 19693679 |
| ticks (acari: ixodidae) infesting birds in an atlantic rain forest region of brazil. | brazil has the third richest bird diversity of the world; however, there are few data concerning ticks (acari: ixodidae) parazitizing birds. the aim of the study was to report tick infestations on wild birds from an atlantic rain forest region of brazil. during 2 yr, ticks were collected from birds and from the environment in 12 forest sites. a total of 1,725 birds were captured representing 80 species from 24 families. in total, 223 (13%) birds were found infested by immature stages of amblyomm ... | 2009 | 19769058 |
| notes on population dynamics of amblyomma ticks (acari: ixodidae) in brazil. | previous population dynamics data, generated for amblyomma parvum aragão and amblyomma cajennense (fabricius) in argentina and southeastern brazil, have indicated that these ticks complete 1 generation per year, with larvae predominating in autumn, nymphs in winter, and mostly adults during spring and summer. the present study reports population dynamics data for free-living amblyomma spp. ticks in northern brazil (amazon forest, latitude 10 degrees s, 63 degrees w), and for amblyomma spp. ticks ... | 2009 | 20050009 |
| 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 |
| 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 |
| 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 |
| ticks on birds in a forest fragment of brazilian cerrado (savanna) in the municipality of uberlândia, state of minas gerais, brazil. | this is a report of tick species, parasite prevalence and infestation intensity of birds in a forest fragment (18° 56' 57'' s and 48° 12' 14'' w) within the brazilian cerrado (savanna), in the municipality of uberlândia, state of minas gerais, brazil. a total of 162 birds from 26 species were captured. one adult tick, 296 larvae and 67 nymphs were found on passerine birds. of these, it was identified 31 larvae and 27 nymphs of amblyomma longirostre, 17 nymphs of a. nodosum, one a. cajennense lar ... | 2010 | 21184702 |
| 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 |
| 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 |
| epidemiology of brazilian spotted fever in the atlantic forest, state of são paulo, brazil. | the tick-borne bacterium rickettsia rickettsii is the aetiological agent of brazilian spotted fever (bsf). the present study evaluated tick infestations on wild and domestic animals, and the rickettsial infection in these animals and their ticks in 7 forest areas adjacent to human communities in the são paulo metropolitan area (spma). the results were compared to ecological traits of each sampled area. two main tick species, amblyomma aureolatum and rhipicephalus sanguineus, were collected from ... | 2012 | 22716923 |
| bird ticks in an area of the cerrado of minas gerais state, southeast brazil. | in the present study the tick prevalence, mean intensity of infestation and species were recorded on birds captured between january 2009 and december 2010 in the ecological station pirapitinga-esec from minas gerais state, brazil. a total of 967 birds, from 15 families and 40 species were captured and 165 (17.1 %) individuals were parasitized by ticks. of these 160 (97 %) belonged to the order passeriformes. five tick species were identified: amblyomma longirostre (n = 274) was the most common s ... | 2012 | 22729500 |
| wild birds and urban ecology of ticks and tick-borne pathogens, chicago, illinois, usa, 2005-2010. | bird-facilitated introduction of ticks and associated pathogens is postulated to promote invasion of tick-borne zoonotic diseases into urban areas. results of a longitudinal study conducted in suburban chicago, illinois, usa, during 2005-2010 show that 1.6% of 6,180 wild birds captured in mist nets harbored ticks. tick species in order of abundance were haemaphysalis leporispalustris, ixodes dentatus, and i. scapularis, but 2 neotropical tick species of the genus amblyomma were sampled during th ... | 2012 | 23017244 |
| rickettsial infection in ticks collected from road-killed wild animals in rio de janeiro, brazil. | during 2008-2010, ticks were collected from road-killed wild animals within the serra dos orgãos national park area in the state of rio de janeiro, brazil. in total, 193 tick specimens were collected, including amblyomma dubitatum neumann and amblyomma cajennense (f.) from four hydrochoerus hydrochaeris (l.), amblyomma calcaratum neumann and a. cajennense from four tamandua tetradactyla (l.), amblyomma aureolatum (pallas) and a. cajennense from five cerdocyon thous l., amblyomma longirostre (koc ... | 2012 | 23270184 |
| new tick records from the state of rondônia, western amazon, brazil. | from 2005 to 2012, ticks were collected from different hosts at different localities of the state of rondônia. the following 16 ixodid tick species were identified: ixodes fuscipes, amblyomma auricularium, amblyomma coelebs, amblyomma dubitatum, amblyomma geayi, amblyomma humerale, amblyomma latepunctatum, amblyomma longirostre, amblyomma naponense, amblyomma nodosum, amblyomma oblongoguttatum, amblyomma ovale, amblyomma romitii, amblyomma rotundatum, amblyomma scalpturatum, and amblyomma varium ... | 2014 | 23975565 |
| 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 infections in ticks from wild birds in paraguay. | ticks were collected from wild birds at 3 locations in paraguay during the south american winter in august and september 2012. in total, 480 birds belonging to 106 species were examined. overall, 31 (6.5%) birds representing 21 species were found parasitized by ticks which were identified as amblyomma calcaratum neumann (2 larvae, 20 nymphs), amblyomma longirostre (koch) (17 larvae, 3 nymphs), amblyomma parvum aragão (7 nymphs), amblyomma aureolatum (pallas) (1 nymph), amblyomma ovale koch (1 ny ... | 2014 | 24231270 |
| 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 |
| ticks infesting birds in atlantic forest fragments in rio claro, state of sao paulo, brazil. | in the present study, we report tick infestations on wild birds in plots of the atlantic forest reforested fragments with native species and plots reforested with eucalyptus tereticornis in the municipality of rio claro, state of sao paulo, brazil. a total of 256 birds were captured: 137 individuals of 33 species, in planted native forest; and 128 individuals of 37 species, in planted eucalyptus tereticornis forest. nymphs of two tick species were found on the birds: amblyomma calcaratum and amb ... | 2013 | 24252949 |
| 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 |
| 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 |
| 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 |
| 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 |
| rickettsial infections in ticks from reptiles, birds and humans in honduras. | ticks were collected from captive reptiles, wild birds, and incidentally from humans at two locations in honduras and part of these were tested for the presence of rickettsia using polymerase chain reaction. the following species of ticks were found: amblyomma dissimile on iguanidae reptiles, amblyomma longirostre and amblyomma nodosum on birds, and amblyomma mixtum (amblyomma cajennense complex) on humans. a. dissimile was infected with rickettsia sp. strain colombianensi. both a. longirostre a ... | 2015 | 26159797 |
| 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 |
| 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 |
| avian migrants facilitate invasions of neotropical ticks and tick-borne pathogens into the united states. | migratory birds have the potential to transport exotic vectors and pathogens of human and animal health importance across vast distances. we systematically examined birds that recently migrated to the united states from the neotropics for ticks. we screened both ticks and birds for tick-borne pathogens, including rickettsia species and borrelia burgdorferi. over two spring seasons (2013 and 2014), 3.56% of birds (n = 3,844) representing 42.35% of the species examined (n = 85) were infested by ti ... | 2015 | 26431964 |
| 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 |
| 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 |
| 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 |
| 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 |