| the life cycle of amblyomma parvum aragao, 1908 (acari: ixodidae) under laboratory conditions. | a colony of amblyomma parvum was started with engorged females collected from cattle in the province of salta (25 degrees 01' s, 63 degrees 56' w), argentina. the progeny of those ticks were fed on rabbits and the non-parasitic stages maintained at 27 +/- 1 degrees c, 83-86% rh in darkness. the life cycle (prefeeding period not evaluated) had a mean duration of 99.6 days. the mean time (days) for the different phases of the cycle were as follows: feeding period of females, 8.0; pre-oviposition p ... | 1991 | 1786743 |
| ticks (ixodidae) parasitizing humans in four provinces of north-western argentina. | in four provinces of north-western argentina (catamarca, jujuy, salta and tucumán), between march 1976 and march 1990, 514 ticks were found on humans. they were identified as rhipicephalus sanguineus group (1 male), boophilus microplus (6 male, 1 female), amblyomma parvum (9 male, 13 female), a. cajannense (35 male, 30 female, 81 nymphs), a. neumanni (33 male, 41 female, 144 nymphs) and amblyomma spp. (10 nymphs, 110 larvae). most of the ticks were from the phytogeographical region of chaco, one ... | 1991 | 1809248 |
| ecological aspects of four species of ticks found on cattle in salta, northwest argentina. | the seasonal activity of amblyomma cajennense, amblyomma neumanni, amblyomma parvum and boophilus microplus on cattle was studied in a ranch located in the northern part of the phytogeographical district of the chaco serrano where the habitat had suffered minimal human disturbance. the female ticks on one side of 10-25 cows were counted at intervals of 20-50 days from 29 october 1985 to 5 november 1986. the percentage of cattle parasitized with larvae and nymphs of amblyomma was recorded, along ... | 1990 | 2343535 |
| amblyomma ticks found on cattle in the northwest of argentina. preliminary report. | the phytogeographical and seasonal distributions of three species of amblyomma ticks found on cattle are presented. the material studied was collected during a four-year survey in the northwest of argentina. amblyomma neumanni shows predilection for the chaqueno serrano district although it was also found in ecotones (phytogeographical transition zones) of the adjacent western chaqueno district and the province of las yungas. amblyomma cajennense was found in the western chaqueno and chaqueno se ... | 1982 | 7081892 |
| seasonal variation of ticks (ixodidae) in bos taurus x bos indicus cattle under rotational grazing in forested and deforested habitats in northwestern argentina. | the seasonal occurrence of ticks infesting cattle was monitored in a bos taurus x bos indicus commercial herd fed on a combination of native grasses and annual pastures in northwestern argentina. the number of female ticks (boophilus and amblyomma) and the proportion of cattle infested with larvae and nymphs of amblyomma ticks were recorded from a sample of 15 cows in 24 visits at intervals of 21-50 days from 5 december 1986 to 24 november 1988. the cattle were maintained on native grasses in fo ... | 1994 | 7839563 |
| cross-mating between amblyomma parvum aragao, 1908 and amblyomma pseudoparvum guglielmone, mangold et keirans, 1990 (acari: ixodidae). | | 1993 | 8244207 |
| 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 |
| 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 |
| 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 |
| 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 |
| the natural hosts for larvae and nymphs of amblyomma neumanni and amblyomma parvum (acari: ixodidae). | based on the hypothesis that birds and rodents are important hosts for subadults of the neotropical amblyomma neumanni and amblyomma parvum ticks, a survey of these type of hosts was carried out from july 2004 to march 2006, in quilino (a. parvum) and dean funes (a. neumanni), córdoba province, argentina. additionally, monthly tick counts were performed on cattle and goats with occasional tick search in other domestic hosts. records of questing height of subadult ticks on vegetation were also ca ... | 2006 | 17006739 |
| parasites of free-ranging small canids and felids in the bolivian chaco. | parasite surveys of free-ranging wildlife provide important information for monitoring population health. between march 2001 and march 2003, we sampled 10 ocelots (leopardus pardalis), eight geoffroy's cats (oncifelis geoffroyi), a jaguarundi (herpailurus yaguarondi), five pampas foxes (pseudalopex gymnocercus), and three crab-eating foxes (cerdocyon thous) at three sites in the bolivian chaco. the objective of the study was to survey the parasite fauna of these carnivores and compare prevalence ... | 2006 | 17312790 |
| detection of a novel spotted fever group rickettsia in amblyomma parvum ticks (acari: ixodidae) from argentina. | the present study evaluated the rickettsial infection in amblyomma parvum ticks collected in northwestern córdoba province, argentina. each tick was subjected to dna extraction and tested by polymerase chain reaction (pcr) targeting fragments of the rickettsial genes glta and ompb. nine (69.2%) out of 13 adult ticks yielded expected pcr products for the two rickettsial genes. products from the ompb pcr were sequenced, generating dna sequences 100% identical for the nine pcr-positive ticks. three ... | 2007 | 17768597 |
| tick fauna from two locations in the brazilian savannah. | the cerrado is brazil's tropical savannah, which is arguably under greater threat than the amazon rainforest. the cerrado biome of tropical south america covers about 2 million km(2) and is considered a biodiversity hot spot which means that it is especially rich in endemic species and particularly threatened by human activities. the cerrado is increasingly exposed to agricultural activities which enhance the likelihood of mixing parasites from rural, urban and wildlife areas. information about ... | 2007 | 17828441 |
| distribution, hosts, 16s rdna sequences and phylogenetic position of the neotropical tick amblyomma parvum (acari: ixodidae). | the hosts, distribution, intraspecific genetic variation and phylogenetic position of amblyomma parvum (acari: ixodidae) have recently been re-assessed. data on this tick's hosts and distribution were obtained not only from existing literature but also from unpublished records. sequences of the ticks' mitochondrial 16s ribosomal dna (rdna) were used to evaluate genetic variation among specimens of a. parvum from different localities in argentina and brazil, and to explore the phylogenetic relati ... | 2008 | 18577332 |
| failure of ivermectin and eprinomectin to control amblyomma parvum in goats: characterization of acaricidal activity and drug pharmacokinetic disposition. | the therapeutic efficacies of ivermectin (subcutaneous injection) and eprinomectin (topical treatment) given at two different dosage levels to goats naturally infested with amblyomma parvum were assessed. treatments included subcutaneous injection of ivermectin at 0.2 and 0.4mg/kg and extra-label pour-on administration of eprinomectin at 0.5 and 1mg/kgb.w. ivermectin and eprinomectin failed to control amblyomma parvum on goats. treatment with ivermectin resulted in a low number of engorged femal ... | 2008 | 18584966 |
| aspects of the life cycle of amblyomma parvum (acari: ixodidae) under natural conditions. | monthly samplings of the rodent galea musteloides (caviidae) were carried out from january 2005 to december 2006 in quilino, córdoba province, argentina, to determine the seasonal distribution of immature stages of amblyomma parvum. in the same locality, cattle and goats were also monthly examined to asses the seasonality of the females of this species. engorged ticks collected on their natural hosts were maintained in the laboratory at 25 degrees c and 83-86% relative humidity to study biologic ... | 2008 | 18620813 |
| rickettsia parkeri in argentina. | clinical reports of an eschar-associated rickettsiosis in the paraná river delta of argentina prompted an evaluation of amblyomma triste ticks in this region. when evaluated by pcr, 17 (7.6%) of 223 questing adult a. triste ticks, collected from 2 sites in the lower paraná river delta, contained dna of rickettsia parkeri. | 2008 | 19046514 |
| molecular detection of ehrlichia chaffeensis in amblyomma parvum ticks, argentina. | | 2008 | 19046533 |
| [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 |
| 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 |
| 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 |
| isolation of rickettsia parkeri and identification of a novel spotted fever group rickettsia sp. from gulf coast ticks (amblyomma maculatum) in the united states. | until recently, amblyomma maculatum (the gulf coast tick) had garnered little attention compared to other species of human-biting ticks in the united states. a. maculatum is now recognized as the principal vector of rickettsia parkeri, a pathogenic spotted fever group rickettsia (sfgr) that causes an eschar-associated illness in humans that resembles rocky mountain spotted fever. a novel sfgr, distinct from other recognized rickettsia spp., has also been detected recently in a. maculatum specime ... | 2010 | 20208020 |
| ticks (acari: ixodidae) from yellow armadillo, euphractus sexcinctus (cingulata: dasypodidae), in brazil's pantanal wetlands. | tick species parasitizing yellow armadillo, euphractus sexcinctus, were recorded from october 2006 to october 2007 in pantanal. a total of 89 ticks were collected from 23 yellow armadillos. most ticks (n=50) were identified as amblyomma cajennense (fabricius) (32 males and 18 females). the only other species found was amblyomma parvum (aragão) (three females and two males). the remaining ticks were immatures of amblyomma (29 nymphs and five larvae). the prevalence of a. cajennense was 55%, the m ... | 2010 | 21120394 |
| ticks infesting wildlife species in northeastern brazil with new host and locality records. | from september 2008 to march 2010, 397 ticks (315 larvae, 33 nymphs, 23 females, and 26 males) were collected from captive and free-living wildlife species in northeastern brazil. six tick species were identified, including amblyomma auricularium (conil) on tamandua tetradactyla (l.), amblyomma dubitatum neumann on hydrochaeris hydrochaeris (l.), nectomys rattus (pelzen) and t. tetradactyla, amblyomma parvum aragão on t. tetradactyla, amblyomma rotundatum koch on boa constrictor l., chelonoidis ... | 2010 | 21175080 |
| life cycle of the tick amblyomma parvum aragão, 1908 (acari: ixodidae) and suitability of domestic hosts under laboratory conditions. | amblyomma parvum is a widespread neotropical tick found on several domestic animals and is known to harbor a rickettsia species of yet unknown pathogenicity. however its life cycle on, and suitability of, several of these hosts has not been described. in this work the biology of a. parvum is presented when fed on seven domestic hosts (chicken, dog, rabbit, horse, guinea pig, cattle and goat). the complete life cycle of the tick varied from 96.8 to 102 days. highest engorgement weight of larvae w ... | 2011 | 21353392 |
| conserved amblyomma americanum tick serpin19, an inhibitor of blood clotting factors xa and xia, trypsin and plasmin, has anti-haemostatic functions. | tick saliva serine protease inhibitors (serpins) facilitate tick blood meal feeding through inhibition of protease mediators of host defense pathways. we previously identified a highly conserved amblyomma americanum serpin 19 that is characterised by its reactive center loop being 100% conserved in ixodid ticks. in this study, biochemical characterisation reveals that the ubiquitously transcribed a. americanum serpin 19 is an anti-coagulant protein, inhibiting the activity of five of the eight s ... | 2015 | 25957161 |
| 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 |
| a new argasid tick species (acari: argasidae) associated with the rock cavy, kerodon rupestris wied-neuwied (rodentia: caviidae), in a semiarid region of brazil. | the rock cavy kerodon rupestris (wied-neuwied, 1820) is a rodent species endemic to northeastern brazil. earlier studies have associated the argasid tick ornithodoros talaje (guérin-méneville, 1849) with rocky cavy; however, a recent study proposed that o. talaje is not established in brazil, where previous reports of this species were possibly misidentifications of closely related species, yet to be properly determined. here, we describe a new species of ornithodoros koch, 1844 associated with ... | 2016 | 27655282 |
| 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 |
| 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 |
| high prevalence of "candidatus rickettsia andeanae" and apparent exclusion of rickettsia parkeri in adult amblyomma maculatum (acari: ixodidae) from kansas and oklahoma. | amblyomma maculatum (the gulf coast tick), an aggressive, human-biting, nearctic and neotropical tick, is the principal vector of rickettsia parkeri in the united states. this pathogenic spotted fever group rickettsia species has been identified in 8-52% of questing adult gulf coast ticks in the southeastern united states. to our knowledge, r. parkeri has not been reported previously from adult specimens of a. maculatum collected in kansas or oklahoma. a total of 216 adult a. maculatum ticks wer ... | 2015 | 25773931 |
| tick-induced allergies: mammalian meat allergy, tick anaphylaxis and their significance. | serious tick-induced allergies comprise mammalian meat allergy following tick bites and tick anaphylaxis. mammalian meat allergy is an emergent allergy, increasingly prevalent in tick-endemic areas of australia and the united states, occurring worldwide where ticks are endemic. sensitisation to galactose-α-1,3-galactose (α-gal) has been shown to be the mechanism of allergic reaction in mammalian meat allergy following tick bite. whilst other carbohydrate allergens have been identified, this alle ... | 2015 | 25653915 |
| the sialotranscriptome of amblyomma triste, amblyomma parvum and amblyomma cajennense ticks, uncovered by 454-based rna-seq. | tick salivary constituents antagonize inflammatory, immune and hemostatic host responses, favoring tick blood feeding and the establishment of tick-borne pathogens in hosts during hematophagy. amblyomma triste, a. cajennense and a. parvum ticks are very important in veterinary and human health because they are vectors of the etiological agents for several diseases. insights into the tick salivary components involved in blood feeding are essential to understanding vector-pathogen-host interaction ... | 2014 | 25201527 |
| candidatus rickettsia andeanae, a spotted fever group agent infecting amblyomma parvum ticks in two brazilian biomes. | adult ticks of the species amblyomma parvum were collected from the vegetation in the pantanal biome (state of mato grosso do sul) and from horses in the cerrado biome (state of piauí) in brazil. the ticks were individually tested for rickettsial infection via polymerase chain reaction (pcr) targeting three rickettsial genes, glta, ompa and ompb. overall, 63.5% (40/63) and 66.7% (2/3) of a. parvum ticks from pantanal and cerrado, respectively, contained rickettsial dna, which were all confirmed ... | 0 | 24714968 |
| rickettsia rickettsii isolation from naturally infected amblyomma parvum ticks by centrifugation in a 24-well culture plate technique. | rocky mountain spotted fever is an acute illness caused by rickettsia rickettsii (r. rickettsii) and is transmitted by the bite of ticks of the genera dermacentor, amblyomma and rhipicephalus. the illness results in a high mortality rate and may be easily confused with other febrile syndromes. in yucatan state, mexico, childhood cases with a high mortality have been reported. in this work we report the isolation of a mexican r. rickettsii strain from a tick egg mass using an alternative method f ... | 2013 | 26623321 |
| host-parasite relationship of ticks (acari: ixodidae and argasidae) and feral pigs (sus scrofa) in the nhecolândia region of the pantanal wetlands in mato grosso do sul. | feral pigs (s. scrofa) were introduced to the pantanal region around 200 years ago and the population appears to be in expansion. its eradication is considered to be impossible. the population of feral pigs in the pantanal wetlands is currently estimated at one million. two scientific excursions were organized. the first was conducted during the dry season, when 21 feral pigs were captured and the second was during the wet season, when 23 feral pigs were captured. ticks were collected and the ov ... | 2013 | 27335855 |
| coxiella burnetii in ticks, argentina. | | 0 | 23343647 |
| 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 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 |
| 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 |
| free-living ixodid ticks in an urban atlantic forest fragment, state of rio de janeiro, brazil. | as a consequence of the importance of ticks in forests in protected areas, was conducted survey of species of free-living ticks in the natural park municipal curió, state of rio de janeiro, brazil. monthly samples were taken by dragging method, dry ice traps and visual search in two transects. adults and nymphs of amblyomma cajennense (n= 147), amblyomma brasiliense (n= 4) and amblyomma parvum (n= 1) were collected. this is the first occurrence of a. parvum in the state. no correlation was found ... | 2014 | 25054511 |
| feral pigs as hosts for amblyomma sculptum (acari: ixodidae) populations in the pantanal, mato grosso do sul, brazil. | the pantanal in brazil is the largest floodplain of the world. this ecosystem, rich in wildlife, has a large feral pig population. such a large host biomass must have a strong influence on the parasite fauna. in this work, we evaluated the role of feral pigs in the maintenance of amblyomma sculptum (formerly amblyomma cajennense), the most prevalent tick species in the pantanal. tick infestations were evaluated on 243 feral pigs and their environment. the suitability of domestic pigs, representi ... | 2014 | 25037743 |
| ticks on humans in the pantanal wetlands, brazil. | information on ticks biting humans in brazil is very restricted. in fact, many times when human tick-borne diseases are diagnosed, the involved vector tick is not identified, although this may be clinically helpful. pantanal is one of the world's largest floodplains, has an exuberant wildlife, and is place of extensive cattle ranching, ecotourism, and fishing. we herein report tick species found on humans in a 13-month survey in a region with both cattle and wildlife handling in the brazilian pa ... | 2014 | 24861806 |
| comparative efficiency of two models of co2 traps in the collection of free-living stages of ixodides. | traps using carbon dioxide (co(2)) as a chemical attractant are known to be effective when capturing nymphs and adults of some free-living tick species such as amblyomma cajennense and amblyomma parvum. despite the fact that the main source of co(2) is dry ice, the chemical trap which uses 20 % lactic acid (c(3)h(6)o(3)) and calcium carbonate (caco(3)) has been tested as an alternative source of co(2) whenever it is difficult to obtain dry ice. the objective of this paper was to test and compare ... | 2012 | 22915273 |
| ticks (acari: ixodidae) associated with small terrestrial mammals in the state of minas gerais, southeastern brazil. | from june 2005 to november 2010, 43 small mammals encompassing 6 species of didelphimorphia, 8 species of rodentia, and 1 species of lagomorpha were found parasitized by ticks in the state of minas gerais, southeastern brazil. nine tick species, in total 186 specimens, were identified as follows: amblyomma cajennense (larvae and nymphs) on opossums and rodents; amblyomma ovale (nymphs) on rodents; amblyomma parvum (nymphs) on rodents; amblyomma coelebs (nymphs) on opossums; amblyomma dubitatum ( ... | 2012 | 22585005 |
| 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 |
| 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 |
| nellore cattle (bos indicus) and ticks within the brazilian pantanal: ecological relationships. | pantanal is a huge floodplain mostly in brazil, and its main economic activity is extensive cattle raising, in farms characterized by an extremely wildlife-rich environment. we herein describe tick infestations of cattle and of the natural environment in pantanal of nhecolândia in brazil, at areas with and without cattle during both dry and wet seasons. environmental sampling resulted in three tick species: amblyomma sculptum (423 nymphs and 518 adults), amblyomma parvum (7 nymphs and 129 adults ... | 2016 | 26613758 |
| complementary data on four methods for sampling free-living ticks in the brazilian pantanal. | in this study, four methods for sampling free-living ticks that are used in ecological and human tick-bite risk studies were evaluated. cloth dragging, carbon dioxide traps and visual searches and inspection of plant litter on the ground were used in field and forest areas within the brazilian pantanal. among the three tick species collected, amblyomma sculptum predominated, followed by amblyomma parvum and amblyomma ovale. dragging, a cheap and simple technique, yielded the highest numbers of t ... | 2017 | 25517531 |
| different lines of evidence used to delimit species in ticks: a study of the south american populations of amblyomma parvum (acari: ixodidae). | the goal of this work was to combine different lines of evidence besides that of molecular markers to delimit species in ticks when the molecular data are not totally congruent. two groups (argentina, brazil) of south american populations of amblyomma parvum were compared to test whether the splitting of these two lineages suggested by genetic analyses is complete. comparative studies of reproductive compatibility, morphological analyses of fixed characters, and comparison of population distribu ... | 2016 | 27506459 |
| amblyomma parvum aragão, 1908 (acari: ixodidae): phylogeography and systematic considerations. | the geographical distribution of amblyomma parvum aragão 1908 in the new world is disjunct, with two main clusters separated from each other by the amazon basin. the main objectives of this study were to further investigate the systematic relationships within a. parvum, to determine whether or not populations from different geographical areas might represent cryptic species, and to reconstruct the phylogeographical evolutionary history of the species. the genetic diversity of a. parvum collected ... | 2016 | 27062445 |
| comparing feeding and reproductive parameters of amblyomma parvum tick populations (acari: ixodidae) from brazil and argentina on various host species. | amblyomma parvum is a neotropical tick that is widely spread and a potential vector of pathogens, including rickettsiae. genetic differences are remarkable between a. parvum populations from brazil and argentina. in this work, feeding and reproduction parameters of a. parvum ticks from these two populations were compared on some key host species to evaluate possible differences in host suitability between them. on the whole parameters of these tick populations were similar when fed on the same h ... | 2013 | 23906808 |
| 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 |
| 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 |
| anaplasmataceae agents among wild mammals and ectoparasites in brazil. | anaplasmataceae agents comprise obligate intracellular bacteria that can cause disease in humans and animals. between august 2013 and march 2015, 31 nasua nasua (coati), 78 cerdocyon thous (crab-eating fox), seven leopardus pardalis (ocelot), 110 wild rodents, 30 marsupials, and 42 dogs were sampled in the pantanal wetland, brazil. in addition, ectoparasites found parasitizing the animals were collected and identified. the present work aimed to investigate the occurrence of anaplasmataceae agent ... | 2017 | 29103397 |
| diversity of piroplasmids among wild and domestic mammals and ectoparasites in pantanal wetland, brazil. | piroplasmoses are one of the most prevalent arthropod-borne diseases of animals. the present work aimed to investigate the occurrence of piroplasmid in wild mammals, domestic dogs and ectoparasites in southern pantanal region, central-western brazil. for that purpose, blood or tissue samples from 31 nasua nasua, 78 cerdocyon thous, 7 leopardus pardalis, 42 dogs, 110 wild rodents, and 30 marsupials, and 1582 ticks were submitted to pcr assays for piroplasmid targeting 18srrna and hps70 genes. sev ... | 2017 | 28941935 |
| mycoplasma ovis infection in goat farms from northeastern brazil. | although mycoplasma ovis (formerly eperythrozoon ovis) has been described in small ruminants worldwide, data on m. ovis in goats remain scarce. accordingly, the aims of the present study were to i) determine the prevalence of hemoplasmas in goats, ii) identify the tick species parasitizing the animals, and iii) determine factors associated with infection in five dairy and three beef goat farms from the paraíba state, northeastern brazil. blood samples were obtained from 402 goats. samples were s ... | 2017 | 29127988 |