| ticks (acari: ixodidae) associated with wild animals in the pantanal region of brazil. | this paper describes the identification of ticks from wild animals of the pantanal region in brazil as part of a comprehensive study about established and emerging tick-host relationships and related pathological aspects. eighty-one animals were captured (representing 13 species, six orders), and ticks were found on 63 (78%). tick species identified included boophilus microplus (canestrini), amblyomma cajennense (f.), amblyomma parvum aragão, amblyomma pseudoconcolor aragão, amblyomma scalpturat ... | 2000 | 11126563 |
| life-cycle and host specificity of amblyomma tigrinum (acari: ixodidae) under laboratory conditions. | biological data of three generations of amblyomma tigrinum in the laboratory are reported and the suitability of different host species for immature ticks are compared. grouping the three generations, infestations by both the larval and nymphal stages were performed on chickens (gallus gallus), wistar rats (rattus norvegicus), rabbits (orytolagus cuniculus), wild mice (calomys callosus), dogs (canis familiaris) and opossums (didelphis albiventris). only dogs were used for infestations by adult t ... | 2002 | 12475081 |
| characterization of spotted fever group rickettsiae in flea and tick specimens from northern peru. | evidence of spotted fever group (sfg) rickettsiae was obtained from flea pools and individual ticks collected at three sites in northwestern peru within the focus of an outbreak of febrile disease in humans attributed, in part, to sfg rickettsia infections. molecular identification of the etiologic agents from these samples was determined after partial sequencing of the 17-kda common antigen gene (htra) as well as pairwise nucleotide sequence homology with one or more of the following genes: glt ... | 2004 | 15528680 |
| ticks (acari: ixodida) on wild carnivores in brazil. | the present study reports field data of ticks infesting wild carnivores captured from july 1998 to september 2004 in brazil. additional data were obtained from one tick collection and from previous published data of ticks on carnivores in brazil. during field work, a total of 3437 ticks were collected from 89 cerdocyon thous (crab-eating fox), 58 chrysocyon brachyurus (maned wolf), 30 puma concolor (puma), 26 panthera onca (jaguar), 12 procyon cancrivorus (crab-eating raccoon), 4 speothos venati ... | 2005 | 16082932 |
| [rectification of diagnosis: amblyomma tigrinum koch in place of amblyomma maculatum koch]. | | 1959 | 13836584 |
| [amblyomma tigrinum in the municipality of lages, sc, and biology observations under laboratory conditions]. | to study the biological features of amblyomma tigrinum, samples of engorged females collected from dogs in the city of lages, sc, brazil, were maintained in petri dishes into an incubator at 27+/-1 degrees c and 80+/-10% rh, for egg laying. for the development of the subsequent experimental phases, artificial infestations were performed in rabbits using the technique of the cotton bag glued to the ear's base. the mean period of hatch, feeding and larval molt were 11.67, 5.93 and 10.96 days, resp ... | 2008 | 18554444 |
| the natural hosts of larvae and nymphs of amblyomma tigrinum koch, 1844 (acari: ixodidae). | the hosts of larvae and nymphs of amblyomma tigrinum, a tick whose adults feed on wild and domestic canidae in south america, are uncertain. a 17 months survey was carried out trapping wild vertebrates in north-western córdoba, argentina, to evaluate their parasitism with a. tigrinum subadults. larvae and nymphs of this tick species were identified conventionally and by comparison of 16s rdna sequences with genbank deposited sequences. a total of 207 small and medium-sized rodents and 182 birds ... | 2006 | 16682121 |
| detection of "candidatus rickettsia sp. strain argentina"and rickettsia bellii in amblyomma ticks (acari: ixodidae) from northern argentina. | ixodid ticks were collected from vegetation and from humans, wild and domestic mammals in a rural area in the semi-arid argentine chaco in late spring 2006 to evaluate their potential role as vectors of spotted fever group (sfg) rickettsiae. a total of 233 adult ticks, identified as amblyomma parvum, amblyomma tigrinum and amblyomma pseudoconcolor, was examined for rickettsia spp. we identified an sfg rickettsia of unknown pathogenicity, "candidatus rickettsia sp. strain argentina", in a. parvum ... | 2010 | 20186466 |
| rickettsia infection in dogs and rickettsia parkeri in amblyomma tigrinum ticks, cochabamba department, bolivia. | only few published data are available on ticks and tick-borne zoonotic pathogens in bolivia. to evaluate rickettsial seroprevalence and infection in dogs and ticks, during february-april 2007, we collected whole blood, sera, and ticks from dogs living in the rural, peri-urban, and urban areas of cochabamba, bolivia. dog sera were subjected to enzyme-linked immunosorbent assay test to detect igg antibodies against rickettsia rickettsii and 68.2% of samples were found to be positive (n = 30; 95% c ... | 2010 | 20426684 |
| 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 |
| 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 |
| [detection of rickettsia andeanae in two regions of chile]. | candidatus 'rickettsia andeanae' is recently recognized specie, with no attributed pathogenic role so far. it has been reported in amblyomma ticks from peru, usa and argentina, and recently in chile, in one specimen of amblyomma triste from a rural locality in arica. | 2013 | 24248107 |
| spotted fever group rickettsiae in amblyomma ticks likely to infest humans in rural areas from northwestern argentina. | this work was performed to detect rickettsia species of the spotted fever group in amblyomma ticks likely to infest humans in rural areas from northwestern argentina. free-living ticks were collected and determined as amblyomma tigrinum, amblyomma neumanni and amblyomma tonelliae. rickettsia infection was determined by polymerase chain reactions which amplify fragments of the rickettsial genes glta and ompa. a high frequency (35/44, 79.5%) of candidatus "rickettsia andeanae" was observed in a. t ... | 2015 | 26707663 |
| 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 |
| 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 |
| first molecular detection of rickettsia parkeri in amblyomma tigrinum and amblyomma dubitatum ticks from uruguay. | rickettsia parkei is the etiological agent of spotted fever in uruguay, where is transmitted to humans by the tick amblyomma triste. in the present study, ticks were collected from capybaras (hydrochoerus hydrochaeris) and domestic dogs during 2011-2012 in different parts of uruguay. three out of 11 (27.3%) amblyomma dubitatum ticks collected from capybaras, and 4 out of 6 (66.7%) amblyomma tigrinum ticks collected from dogs were shown by molecular analyses to be infected by rickettsia parkeri s ... | 2014 | 25108780 |
| 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 |
| [amblyomma triste and amblyomma tigrinum (acari: ixodidae) in sympatry in santa fe province, argentina]. | the aim of this communication is to report, for the first time, the occurrence of amblyomma triste in santa fe province, argentina, and to add a new isolation place for amblyomma tigrinum. both species of ticks are vectors of rickettsia parkeri, a spotted fever group rickettsia. ticks were recovered from tourists in august 2014 and december 2015 at the federico wildermuth foundation (31° 59's, 61° 24'o), san martin department, santa fe province. five adult ticks were morphologically identified a ... | 2016 | 27723618 |
| rickettsia parkeri in amblyomma dubitatum ticks in a spotted fever focus from the brazilian pampa. | spotted fever is an acute febrile illness, which is considered severely underreported and misdiagnosed in the brazilian pampa, caused by tick-borne rickettsiae. here, we report an eco-epidemiological investigation of rickettsia spp. in ticks from a spotted fever focus in toropi, southern brazil. ticks were collected from capybara carcasses and processed individually to obtain genomic dna. rickettsia was investigated using pcr that amplified the rickettsial fragments of the glta, ompa and htra ge ... | 2017 | 28359827 |
| amblyomma tigrinum (acari: ixodidae): new data on hosts and biology of immature stages and on dna composition. | biological data of immature stages of amblyomma tigrinum were obtained from larvae and nymphs both fed on rats and rabbits. data from nymphs recovered from a wild rodent (galea musteloides) are also reported. additional results in dna composition of males moulted from nymphs fed on laboratory and wild hosts are presented. the ticks were maintained in darkness at 27 +/- 1 degrees c and 83-86% rh. the mean recovery rates were 49.1% and 43.6% with a moulting success of 96.2% and 90.8% in larvae fed ... | 2005 | 16143451 |
| [molecular detection of rickettsia massiliae and anaplasma platys infecting rhipicephalus sanguineus ticks and dogs, bahía blanca (argentina)]. | rickettsioses, ehrlichioses and anaplasmoses are caused by gram negative obligate intracellular bacteria and transmitted mainly by arthropods. | 2014 | 25491455 |
| rickettsia parkeri rickettsiosis in different ecological regions of argentina and its association with amblyomma tigrinum as a potential vector. | rickettsia parkeri, a newly recognized tick-borne pathogen of humans in the americas, is a confirmed cause of spotted fever group rickettsiosis in argentina. until recently, almost all cases of r. parkeri rickettsiosis in argentina have originated from the paraná river delta, where entomological surveys have identified populations of r. parkeri-infected amblyomma triste ticks. in this report, we describe confirmed cases of r. parkeri rickettsiosis from córdoba and la rioja provinces, which are l ... | 2014 | 25349376 |
| ectoparasites of the critically endangered insular cavy, cavia intermedia (rodentia: caviidae), southern brazil. | cavia intermedia is a rodent species critically endangered and is found only on a 10 hectare island off the southern brazilian coast. to identify the ectoparasites of c. intermedia, 27 specimens (14 males and 13 females), representing approximately 65% of the estimated total population, were captured and examined. a total of 1336 chewing lice of two species were collected: gliricola lindolphoi (amblycera: gyropidae) and trimenopon hispidum (amblycera: trimenoponidae). in addition, chiggers ariso ... | 2015 | 25830106 |
| detection of leishmania dna in wild foxes and associated ticks in patagonia, argentina, 2000 km south of its known distribution area. | zoonotic visceral leishmaniasis (zvl) is a vector-borne disease affecting humans and other mammals and caused by the protozoan parasite leishmania (leishmania) infantum (syn. l. chagasi), belonging to the l. donovani complex. the regions in northern argentina (above 32 °s) are its southern distribution limit in south america. | 2016 | 27125871 |
| molecular detection and genotyping of coxiella-like endosymbionts in ticks that infest horses in south korea. | members of the genus coxiella can be transmitted from ticks to humans during contact with animals; coxiella may thus spread from the infected horses or ticks to humans. in this study, the presence of coxiella burnetii and coxiella-like endosymbionts (cle) in ticks found on infested horses was determined using pcr and genotyping. a total of 213 ticks were randomly collected from 51 horses (4-5 ticks per horse) raised on jeju island, korea, between 2009 and 2013. all ticks were morphologically ide ... | 2016 | 27792764 |
| spotted fever group rickettsia in the pampa biome, brazil, 2015-2016. | | 0 | 27767913 |
| 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 |
| 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 |
| seasonal distribution of larvae and nymphs of amblyomma tigrinum koch, 1844 (acari: ixodidae). | the seasonality of immature stages of amblyomma tigrinum was studied in an area of the chaco phytogeographical province in córdoba, argentina by monthly collection of larvae from ground feeding birds and sigmodontinae rodents, and nymphs from caviidae rodents from may 2005 to april 2007. an apparent peak of abundance was found from december to may but differences with other months of the year were not significant (p>0.05). these and previous results suggest that the parasitic stages of a. trigri ... | 2009 | 19833442 |
| ticks (acari: ixodida: argasidae, ixodidae) infesting humans in northwestern cordoba province, argentina. | ticks infesting humans were collected from september 2004 to august 2005 in northwestern córdoba in an area with a southern limit in the locality of dean funes (30 degrees 25's 64 degrees 20'w) and san josé de las salinas (30 degrees 00's 64 degrees 37'w) in the north. the collections consisted in ticks found attached on man obtained from three sources: 1) specimens fixed on two workers during two successive days per month of field work in the northern part of the area which belongs to western c ... | 2006 | 16871909 |
| ectoparasites of free-ranging pumas and jaguars in the paraguayan chaco. | ectoparasites were collected from seven puma (puma concolor) and seven jaguar (panthera onca) live-captures (each representing six different animals) in the paraguayan chaco from 2002 to 2004. the same five species of ectoparasites were recovered from both host species: the flea, pulex simulans (total on both hosts combined=30 male, 49 female), and the ticks, amblyomma cajennense (1 male, 4 female, 46 nymphs, 241 larvae), amblyomma parvum (42 male, 25 female), amblyomma tigrinum (1 male, 7 femal ... | 2006 | 16464533 |
| first record of immature stages of amblyomma tigrinum (acari: ixodidae) on wild birds in chile. | for the first time, larvae and nymphs of amblyomma tigrinum ticks were found on three species of wild birds (zenaida auriculata, callipepla californica and nothoprocta perdicaria) in chile. a significant higher number of a. tigrinum was found on fledglings of z. auriculata and n. perdicaria than on adults of these species of birds. a significant higher number was also observed on n. perdicaria living in non-irrigated areas as compared with irrigated areas. infestation levels were 6.5, 6.3 and 10 ... | 2004 | 15285147 |
| amblyomma tigrinum (acari: ixodidae) in relation to phytogeography of central-northern argentina with notes on hosts and seasonal distribution. | the findings of amblyomma tigrinum in continental argentina north of 40 degrees s are presented according to phytogeographic domains (andean-patagonic, amazonian and chaco) and the seasonal distribution is depicted on a monthly basis. a total of 718 adult ticks and four nymphs were found. a. tigrinum ticks were present in all domains. adult ticks were found all year round but they were more abundant during the summer. most ticks were found on domestic dogs but the survey has a bias to domestic h ... | 2000 | 11354625 |
| external and gastrointestinal parasites of the rufous-collared sparrow zonotrichia capensis (passeriformes, emberizidae) in chile. | a total of 277 rufous-collared sparrows, zonotrichia capensis müller, 1776 (emberizidae), were examined for external parasites. the birds were captured using mist nets in seven locations in northern and central chile. additionally, seven carcasses from central chile (the biobío region) were necropsied to evaluate the presence of endoparasite infection. ectoparasites were found on 35.8% (99/277) of the examined birds and they were represented by the following arthropods: feather mites amerodectes ... | 2017 | 28977245 |
| rickettsia spp. among wild mammals and their respective ectoparasites in pantanal wetland, brazil. | the genus rickettsia comprises obligatory intracellular bacteria, well known to cause zoonotic diseases around the world. the present work aimed to investigate the occurrence of rickettsia spp. in wild animals, domestic dogs and their respective ectoparasites in southern pantanal region, central-western brazil, by molecular and serological techniques. between august 2013 and march 2015, serum, whole blood and/or spleen samples were collected from 31 coatis, 78 crab-eating foxes, seven ocelots, 4 ... | 2018 | 29111373 |
| two novel ehrlichia strains detected in amblyomma tigrinum ticks associated to dogs in peri-urban areas of argentina. | the aim of this work was to describe two novel strains of ehrlichia associated to amblyomma tigrinum from argentina. molecular detection of agents belonging to the family anaplasmataceae was performed targeting three different loci: 16s rrna gene, dsb gene and a fragment of groesl heat shock operon. the results have shown that two different strains of ehrlichia sp. associated to a. tigrinum are circulating in peri-urban areas of argentina. the ehrlichia strain detected in ticks from san luis pro ... | 2017 | 28750866 |
| seroprevalence of tick-borne pathogens and tick infestation in dogs from tapirapé and karajá indigenous communities, brazil. | with the aim of studying some tick-borne diseases, a total of 327 dogs (114 from tapirapé and 213 from karajá indigenous ethnicity, mato grosso, mt, brazil) were sampled. serum samples were submitted to the indirect fluorescence antibody test (ifat) to detect antibodies against babesia vogeli, ehrlichia canis, and rickettsia spp. possible associations of risk factors and the occurrence of seroreativity to tick-borne agents and tick infestations were analyzed through chi-squared tests. among 327 ... | 2015 | 26186512 |
| ticks (ixodida: ixodidae) parasitising humans in uruguay. | during routine collections between november 1999 and november 2002, three species of tick (amblyomma tigrinum, amblyomma triste and rhipicephalus sanguineus) were found on humans in southern uruguay. the finding of r. sanguineus and a. triste on humans is of particular concern because these tick species may be involved in the transmission of the pathogens causing human rickettsioses, a type of disease already known to occur in uruguay. | 2003 | 14613636 |
| [occurrence of ticks (acari: ixodidae) in the municipality of goiatins, tocantins]. | due to a suspected human case of brazilian lyme-like disease in the city of goiatins, tocantins state, an epidemiological survey was carried out in eight counties in this region during september 2007 and february 2008, where 1,890 ticks were collected from domestic animals and from the environment. a total of eight tick species were identified: rhipicephalus sanguineus, rhipicephalus (boophilus) microplus, dermacentor nitens, amblyomma cajennense, amblyomma oblongoguttatum, amblyomma ovale, ambl ... | 2009 | 19602318 |