| experimental transmission of cowdria ruminantium (rickettsiales) by the american reptile tick amblyomma dissimile koch, 1844. | a senegalese isolate of the rickettsia cowdria ruminantium was transmitted transstadially by nymphs of the american reptile tick amblyomma dissimile. only eight nymphs, fed as larvae on a saanen goat reacting to heartwater, were required to transmit fatal heartwater to another susceptible goat. since a. dissimile usually feeds on snakes, iguanas and lizards in central america, the tick is not considered to play a significant role in the transmission of heartwater between ruminants. however, the ... | 1992 | 1395974 |
| cytogenetics of ticks (acari: ixodoidea). 18. chromosomes and laboratory biology of amblyomma dissimile. | | 1985 | 4045940 |
| notes on the biology of amblyomma dissimile koch, 1844 (acari:ixodida) on bufo marinus (linnaeus, 1758) from brazil. | amblyomma dissimile is a common ectoparasite of cold blooded animals and is an accidental ectoparasite of some wild mammals. details of the biology of specimens from the state of amapá were studied in the laboratory in a humidity chamber at an average environmental temperature of 19.5 degrees c, using bufo marinus as host for the time in brazil. we also report the first record of this species in the state of minas gerais. | 1994 | 7823816 |
| establishment of the foreign partheonogenetic tick amblyomma rotundatum (acari: ixodidae) in florida. | the parthenogenetic tick amblyomma rotundatum, a central and south american species, has become established in southern florida. the date of introduction is unknown, but it is suspected to be either during the 1930s, when 1 of its natural hosts, the giant or marine toad, bufo marinus, was introduced to southern florida as a potential biological control of pest beetles in sugar cane fields, or between 1955 and 1964 when specimens of b. marinus were accidentally or deliberately released in the gre ... | 1993 | 8410557 |
| parasitic arthropods of sympatric opossums, cotton rats, and cotton mice from merritt island, florida. | six species of parasitic arthropods were collected from 12 opossums (didelphis virginiana), 8 species were obtained from 28 cotton rats (sigmodon hispidus), and 4 species were collected from 10 cotton mice (peromyscus gossypinus) from merritt island, brevard county, florida. the flea polygenis gwyni was the only parasite that infested all 3 host species, and it was present in very high densities (mean intensity = 73.7) on the opossums. the american dog tick, dermacentor variabilis, and the tropi ... | 1993 | 8459341 |
| genetic markers for the identification of two tick species, amblyomma dissimile and amblyomma rotundatum. | genetic markers are described for 2 species of reptile and amphibian ticks, amblyomma dissimile and amblyomma rotundatum, by allozyme electrophoresis. fixed allelic differences in 4 out of the 8 examined loci allowed the unequivocal separation of both of these species. a strong correlation was found between these genetic markers and the relative size of the spurs in coxae iv but not with the punctuation pattern of the scutum. moreover, no overlap was found in the distribution of relative spur si ... | 1997 | 9194816 |
| population genetic structure of a three-host tick, amblyomma dissimile, in eastern venezuela. | patterns of genetic variation for the tick amblyomma dissimile were analyzed from a total of 200 ticks collected on 12 toads (bufo marinus), 14 snakes (boa constrictor), and 8 lizards (iguana iguana) at 11 localities. the analyses were performed on electrophoretic data from 8 isozyme loci. mean heterozygosity per locus was 6% (+/-3.1) per population. differences in allelic frequencies among ticks from different individual hosts were the major source of genetic variability in this study. host spe ... | 1998 | 9920303 |
| ticks from a morelet's crocodile in belize. | parasitism of crocodilians by ticks has rarely been reported, and to our knowledge only seven published accounts exist. on 3 july 1999, we collected four ticks from a subadult morelet's crocodile (crocodylus moreletii) captured in northern belize. these were identified as amblyomma dissimile (one female), and amblyomma sp. (two nymphs, one larva). the crocodile was captured on land approximately 100 m from water, and all four ticks were attached to loose skin on the lateral surface of the tail. ... | 2001 | 11763751 |
| an enzootic transmission cycle of lyme borreliosis spirochetes in the southeastern united states. | lyme borreliosis, or lyme disease (ld), is a tick-borne zoonotic infection of biomedical significance, caused by borrelia burgdorferi sensu lato (s.l.) spirochetes and transmitted by ixodes species ticks. it usually circulates among wildlife vertebrate reservoirs and vector ticks but may infect humans, causing multisystem problems. in far western and northern north america, the host reservoirs, tick vectors, and genospecies of borrelia are well known but not so in the southern u.s., where there ... | 2003 | 14500917 |
| ticks parasitizing reptiles in the bahamas. | two species of reptile ticks, amblyomma dissimile koch and amblyomma torrei pérez vigueras (acari: ixodidae), are reported from the bahama islands for the first time. the widespread neotropical (including the caribbean and southern florida) a. dissimile was recovered on andros island from three species of reptiles all for the first time: the andros iguana cyclura cychlura cychlura cuvier, the andros curly tail lizard leiocephalus carinatus coryi schmidt, and the andros boa epicrates striatus fow ... | 2005 | 16134982 |
| ticks infesting amphibians and reptiles in pernambuco, northeastern brazil. | ticks infesting amphibians and reptiles in the state of pernambuco are reviewed, based on the current literature and new collections recently carried out by the authors. to date, three tick species have been found on amphibians and reptiles in pernambuco. amblyomma fuscum appears to be exclusively associated with boa constrictor, its type host. amblyomma rotundatum has a relatively low host-specificity, being found on toads, snakes, and iguana. amblyomma dissimile has been found on a lizard and ... | 2008 | 19265581 |
| a first record of amblyomma dissimile (acari: ixodidae) parasitizing the lizard ameiva ameiva (teiidae) in brazil. | a non-engorged adult female amblyomma dissimile and two amblyomma sp. larvae were found parasitizing the lizard ameiva ameiva in the municipality of chapadinha, state of maranhão. this is the first record in the state of maranhão and fills a gap in the distribution of a. dissimile in brazil. the lizard a. ameiva represents a new host for a. dissimile, and also the first record of this tick species infesting lizards of the family teiidae in brazil. | 2010 | 21184707 |
| first reports of ectoparasites collected from wild-caught exotic reptiles in florida. | we collected ectoparasites from 27 of 51 wild-caught, free-ranging exotic reptiles examined in florida from 2003 to 2008. sampled animals represented eight species, five of which yielded ectoparasites. reported new parasite distribution records for the united states include the following: the first collection of the african tick amblyomma latum (koch) from a wild-caught animal [ball python, python regius (shaw)] in the united states; the first collection of the lizard scale mite hirstiella stami ... | 2011 | 21337954 |
| amblyomma dissimile koch (acari: ixodidae) attacking primolius maracana vieillot (psittaciformes: psittacidae) in the amazon region, state of pará, brazil. | the tick amblyomma dissimile koch feeds preferentially on reptiles (squamata), although amphibians (anura) also seem to be important hosts. we report an a. dissimile nymph infesting a blue-winged macaw, primolius maracana, held in captivity in the mangal das garças park, state of pará, brazil. environmental observations suggest that free-living iguanas (iguana iguana), which used to walk on the bird enclosure in the park, were the source of the a. dissimile tick that infested the blue-winged mac ... | 2011 | 21952971 |
| the case for a 'one health' approach to combating vector-borne diseases. | | 2015 | 26027713 |
| 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 |
| detection of rickettsia and ehrlichia spp. in ticks associated with exotic reptiles and amphibians imported into japan. | one of the major routes of transmission of rickettsial and ehrlichial diseases is via ticks that infest numerous host species, including humans. besides mammals, reptiles and amphibians also carry ticks that may harbor rickettsia and ehrlichia strains that are pathogenic to humans. furthermore, reptiles and amphibians are exempt from quarantine in japan, thus facilitating the entry of parasites and pathogens to the country through import. accordingly, in the current study, we examined the presen ... | 2015 | 26207382 |
| 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 |
| ticks and rickettsiae from wildlife in belize, central america. | the agents of spotted fevers in latin america are rickettsia rickettsii, r. parkeri, rickettsia sp. strain atlantic rainforest, and r. massiliae. in continental central america, r. rickettsii remains the only known pathogenic tick-borne rickettsia. in the present study, ticks were collected from wild mammals in natural areas of belize. besides providing new data of ticks from belize, we investigated rickettsial infection in some of these ticks. our results provide ticks harboring rickettsial age ... | 2016 | 26831147 |
| questing amblyomma mixtum and haemaphysalis juxtakochi (acari: ixodidae) infected with candidatus "rickettsia amblyommii" from the natural environment in panama canal basin, panama. | this work emphasizes the detection of candidatus "rickettsia amblyommii" in questing haemaphysalis juxtakochi and amblyomma mixtum. from february 2009 to december 2012, questing ticks were collected from the vegetation and leaf-litter of four protected forests and two grassy areas around the panama canal basin. dna was extracted from amblyomma mixtum, amblyomma naponense, amblyomma oblongoguttatum, amblyomma pecarium, amblyomma tapirellum, haemaphysalis juxtakochi, and unidentified immature ambl ... | 2015 | 26865823 |
| contributions to rickettsioses research in colombia (1917-1943), luis b. patiño camargo. | colombian physician luis benigno patiño camargo was one of the pioneers in the study of rickettsioses in south america, demonstrating for the first time in colombia the presence of rickettsia rickettsii as the etiological agent of a highly deadly exanthematic febrile syndrome in the 1930s. however, patiño-camargo performed other investigations from 1917-1943, which represent the first descriptions and scientific evidence of the presence of r. prowazekii and r. typhi in colombia. almost 60 years ... | 2016 | 27074327 |
| tick-borne rickettsial pathogens in questing ticks, removed from humans and animals in mexico. | tick-borne rickettsial diseases (tbrd) are commonly encountered in medical and veterinary clinical settings. the control of these diseases is difficult, requiring disruption of a complex transmission chain involving a vertebrate host and ticks. the geographical distribution of the diseases is related to distribution of the vector, which is an indicator of risk for the population. a total of 1107 were collected by tick drag from forests, ecotourism parks and hosts at 101 sites in 22 of the 32 sta ... | 0 | 26726019 |
| rickettsia parkeri infecting free-living amblyomma triste ticks in the brazilian pantanal. | the present study evaluated the infection of rickettsiae in 151 rhipicephalus sanguineus, 59 amblyomma ovale, 166 amblyomma triste, one amblyomma dissimile and four amblyomma dubitatum ticks collected in the municipality of poconé, state of mato grosso, within the pantanal biome of brazil. ticks were individually processed by the hemolymph test with gimenez staining, isolation of rickettsia in vero cell culture by the shell vial technique, and polymerase chain reaction (pcr) targeting the citrat ... | 2015 | 25650348 |
| rickettsia sp. strain colombianensi (rickettsiales: rickettsiaceae): a new proposed rickettsia detected in amblyomma dissimile (acari: ixodidae) from iguanas and free-living larvae ticks from vegetation. | from january to december 2009, 55 amblyomma dissimile (koch) ticks removed from iguanas in the municipality of monteria and 3,114 ticks [458 amblyomma sp. larvae, 2,636 rhipicephalus microplus (canestrini) larvae and 20 amblyomma sp. nymphs] collected over vegetation in los cordobas were included in the study. the ticks were pooled into groups from which dna was extracted. for initial screening of rickettsia sp., each pool was analyzed by glta real-time polymerase chain reaction (pcr). positive ... | 2012 | 22897060 |
| 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 |
| occurrence of amblyomma dissimile on wild crocodylians in southern mexico. | ticks are common ectoparasites of amphibians and reptiles but very few reports of such parasites on crocodylians exist worldwide. herein, we report the first detailed observations of amblyomma dissimile koch, 1844 on the 3 crocodylian species present in mexico, with the first report of tick parasitism on crocodylus acutus and the second on caiman crocodilus chiapasius. this is also the first report of a. dissimile in the state of quintana roo. proportions of infested individuals found in this st ... | 2016 | 27667814 |
| new records of amblyomma goeldii (acari: ixodidae) and description of the nymphal stage. | since its original description from the amazonian region, the tick species amblyomma goeldii neumann, 1899 has been misidentified with amblyomma rotundatum koch, 1844 in different countries of the neotropical region. because of this, some authors have considered that the only confirmed records of a. goeldii were from french guyana. herein, we reviewed all specimens of a. goeldii that have been deposited at two tick collections in brazil. in addition, we describe the nymphal stage of a. goeldii f ... | 2015 | 25947818 |
| ticks imported to europe with exotic reptiles. | it is known that traded exotic animals carry with them an immense number of associated symbionts, including parasites. reptiles are no exception. most of the imported reptiles originate from tropical countries and their possibility to carry potentially dangerous pathogens is high. according to cites, europe is currently the main reptile importer in the world. despite this, there is no review or analysis available for the risk related to the importation of tick-borne diseases with traded reptile ... | 2015 | 25913453 |
| morphological and molecular identification of ticks infesting boa constrictor (squamata, boidae) in manaus (central brazilian amazon). | the boa constrictor is one of the world's largest vertebrate carnivores and is often found in urban areas in the city of manaus, brazil. the morphological identification of ticks collected from 27 snakes indicated the occurrence of amblyomma dissimile koch 1844 on all individuals sampled. in contrast, amblyomma rotundatum koch was found on only two snakes. an analysis of the 16s rrna molecular marker confirmed the morphological identification of these ectoparasites. | 2017 | 25517537 |
| survey of helminths, ectoparasites, and chytrid fungus of an introduced population of cane toads, rhinella marina (anura: bufonidae), from grenada, west indies. | one hundred specimens of rhinella marina , (anura: bufonidae) collected in st. george's parish, grenada, from september 2010 to august 2011, were examined for the presence of ectoparasites and helminths. ninety-five (95%) were parasitized by 1 or more parasite species. nine species of parasites were found: 1 digenean, 2 acanthocephalans, 4 nematodes, 1 arthropod and 1 pentastome. the endoparasites represented 98.9% of the total number of parasite specimens collected. grenada represents a new loc ... | 2014 | 24960037 |
| contributions to the knowledge of hard ticks (acari: ixodidae) in colombia. | the known tick fauna of colombia includes 58 species (15 argasidae and 43 ixodidae). to add to the knowledge of the biology of ticks in colombia, hard ticks (ixodidae) were collected from domestic animals or vegetation during 2014-2016 in 10 of colombia's departments. ticks were identified to species through morphological examinations. taxonomic identification was confirmed for some specimens by molecular methods, including phylogenetic analyses inferred from three tick genes (cytochrome c oxida ... | 2018 | 29055642 |