| amblyomma inornatum (acarina: ixodidae): natural hosts and laboratory biology. | | 1977 | 903941 |
| a review of the evidence in retrospect for a rickettsial etiology in bullis fever. | the authors have presented evidence through work done 25-30 years ago for the rickettsial etiology of bullis fever, a forgotten epidemic which occurred with over a 1,000 cases among world war ii troops in training at camp bullis, texas. rickettsiae were recovered from blood and lymph nodes of patients and from ticks, amblyomma americanum, collected in the area. all patients gave a history of tick-bites. the human and tick strains of rickettsiae, carried in chick embryo culture and in animal pass ... | 1975 | 1103350 |
| monthly incidence of theileria cervi and seroconversion to babesia odocoilei in white-tailed deer (odocoileus virginianus) in texas. | monthly monitoring of fawns collected from an area in texas endemic for theileria cervi and babesia odocoilei showed that transmission of t. cervi occurred during july and august, a time period consistent with the occurrence of amblyomma americanum. seroconversion to b. odocoilei occurred during october to december and possibly continued through january and february. the time of seroconversion was more suggestive of transmission of b. odocoilei by ixodes scapularis than by amblyomma americanum. | 1992 | 1512881 |
| ectoparasites of the blackbuck antelope (antilope cervicapra). | fifty-two free-ranging blackbuck antelope (antilope cervicapra) from texas were examined for ectoparasites. two species of sucking lice (anoplura), one species of chewing louse (mallophaga), one species of louse fly (diptera), and three species of ticks (acari) were found. this is the first report of the anoplurans linognathus cervicaprae and l. pithodes from the western hemisphere. the southern deer ked (lipoptena mazamae), the winter tick (dermacentor albipictus), and the rabbit tick (haemaphy ... | 1992 | 1512888 |
| isolation of borrelia burgdorferi from arthropods collected in texas. | the texas department of health laboratory cultured arthropods from november 1988 through december 1989 in an attempt to isolate borrelia burgdorferi, the etiologic agent of lyme disease. spirochetes were isolated from eight of 1,093 pools of arthropods cultured. the spirochetal isolates were from several tick and one flea species, including amblyomma americanum, a. maculatum, ixodes scapularis, and ctenocephalides felis. these 8 isolates reacted specifically when treated with monoclonal antibodi ... | 1991 | 2063950 |
| rickettsia in texas. | since the first reported case in 1941, rocky mountain spotted fever in humans has been reported from many areas of texas, with two major foci, one located in the north-central region and the other in the eastern region of the state. during the period 1979-1988, 421 cases of rmsf were reported, reaching 108 cases in 1983 and declining in subsequent years. statewide surveillance programs to detect spotted fever group rickettsiae in tick populations were initiated in 1976. in recent years, the sfg ... | 1990 | 2378448 |
| effects of sequential infestations of dermacentor albipictus and amblyomma americanum (acari: ixodidae) on overwintering beef cows in west-central texas. | infestations of winter ticks, dermacentor albipictus (packard), observed on mature black angus cows, reached peak levels in january and diminished through march. infestations of adult lone star ticks, amblyomma americanum (l.), began in mid-january and increased through may. cows receiving ectrin, taktic, or deltox treatments on 13 december and 21 february experienced significantly less weight loss and entered the subsequent breeding season with higher average body weight than untreated cows. in ... | 1990 | 2388237 |
| comparison of the isozyme phenotypes of the morphologically similar ticks amblyomma cajennense and a. imitator (acari: ixodidae) from south texas. | a survey of amblyomma koch tick populations in southern texas revealed that a. imitator kohls was restricted to the two most southern counties, but that a. cajennense (fabricius) ranged at least as far north as kingsville, tex. females of the two species could be distinguished by the presence of chitinous tubercles on the festoons of a. cajennense and the presence of projections over both sides of the apron of the genital aperture in a. imitator. males were distinguished by size, ornamentation, ... | 1989 | 2926774 |
| spotted fever group rickettsiae in the lone star tick, amblyomma americanum (acari: ixodidae). | | 1986 | 3772952 |
| prevalence of borrelia (spirochaetaceae) spirochetes in texas ticks. | between 1990 and 1992, ticks from eight texas parks were collected and analyzed to determine the prevalence of spirochete-infected ticks. borrelia spirochetes were detected in 1.03% of 5,141 amblyomma americanum (l.) adults examined, a species texas residents often encounter. no spirochetes were observed in the other tick species tested. | 1994 | 8189421 |
| identification of an uncultivable borrelia species in the hard tick amblyomma americanum: possible agent of a lyme disease-like illness. | bites from the hard tick amblyomma americanum are associated with a lyme disease-like illness in the southern united states. to identify possible etiologic agents for this disorder, a. americanum ticks were collected in missouri, texas, new jersey, and new york and examined microscopically. uncultivable spirochetes were present in approximately 2% of the ticks. borrelia genus-specific oligonucleotides for the flagellin and 16s rrna genes were used for amplification of dna. products were obtained ... | 1996 | 8568302 |
| ability of the lyme disease spirochete borrelia burgdorferi to infect rodents and three species of human-biting ticks (blacklegged tick, american dog tick, lone star tick) (acari:ixodidae). | the infectivity of a diverse collection of borrelia burgdorferi strains from north america for mice was determined as a prelude to vector competence experiments with the 3 primary human-biting tick species in the eastern united states (ixodes scapularis say, dermacentor variabilis (say), amblyomma americanum (l.)]. of the 34 b. burgdorferi strains inoculated into mice, 29 were infectious; the exceptions were 5 isolates from texas. vector competence experiments were conducted with 2 strains from ... | 1997 | 9220680 |
| detection of a spotted fever group rickettsia in amblyomma cajennense (acari: ixodidae) in south texas. | thai tick typhus rickettsia (strain tt-118), a spotted fever group rickettsia of indeterminant pathogenicity, was isolated from a mixed pool of larval ixodes and rhipicephalus ticks collected from thailand in 1962. here we report the surprising finding of a spotted fever group rickettsia with closest sequence homology to the thai tick typhus rickettsia in amblyomma cajennense (f.) ticks from south texas. sequence analysis was performed on segments of 3 genes that differentiate rickettsial specie ... | 1998 | 9701930 |
| the travels of a lone star tick. | a lone-star tick, amblyomma americanum, was found as a pedunculated lesion on the back of the arm of an 84 year old man in northern ireland. this was acquired on a visit to the usa. the tick is found mainly in texas and the ozark mountains of missouri, with scattered foci in other parts of southern usa. it is the vector of rocky mountain spotted fever. as worldwide travel becomes increasingly common, exotic parasites make occasional appearances in northern europe. | 1998 | 9708212 |
| american canine hepatozoonosis. an emerging disease in the new world. | hepatozoon canis was first described from dogs in 1905 in india and rhipicephalus sanguineus was identified as the vector. dogs on the texas gulf coast were recognized in 1978 to have hepatozoonosis, and it was thought that h. canis had entered the new world. later, it was realized that american canine hepatozoonosis (ach) is more debilitating than its old world counterpart, often resulting in death. when the malady and parasite were characterized, a new species, h. americanum, was described, in ... | 2000 | 11193705 |
| analysis of serum and whole blood values in relation to helminth and ectoparasite infections of feral pigs in texas. | in the summers of 1996 and 1997, 60 wild pigs (sus scrofa) were necropsied from three sites in south texas (usa) to test the hypothesis that serum and whole blood parameters vary significantly (p < or = 0.05) with the prevalence and intensity of parasites infecting wild pigs. we found ten parasite species: five nematodes (metastrongylus salmi, metastrongylus pudentotectus, stephanurus dentatus, oesophagostomum dentatum, and physocephalus sexalatus); four ixodid ticks (amblyomma cajennense, ambly ... | 2002 | 12038138 |
| babesiosis and heartwater: threats without boundaries. | suppose one of your clients from southern florida starts talking about cattle egrets while you are vaccinating her cat. it seems she found a nearly dead egret near the cattle pen a few days ago, picked it up, and noticed a number of what looked like small ticks on the legs. or, suppose you are called out to a small dairy in central texas to look at some cows that are feverish and anemic. the first animal you examine has a few brown ticks attached just under the tail. finally, perhaps you are loo ... | 2002 | 12442575 |
| rickettsia honei: a spotted fever group rickettsia on three continents. | rickettsia honei (also known as strain tt-118) has been detected on three continents. originally isolated in thailand in 1962 (and confirmed in 2001), it has also been detected on flinders island (australia) in 1993 and in texas (usa) in 1998. on each continent it has been associated with a different species of tick. the original isolate (thai tick typhus strain tt-118) was from a pool of larval ixodes and rhipicephalus ticks. later it was detected in i. granulatus from rattus rattus. its pathog ... | 2003 | 12860601 |
| hosts and distribution of amblyomma auricularium (conil 1878) and amblyomma pseudoconcolor aragão, 1908 (acari: ixodidae). | collections of amblyomma auricularium (conil 1878) and a. pseudoconcolor aragão, 1908 are discussed in relation to distribution and hosts. three tick collections (two from argentina and a third from the usa) house a total of 574 a. auricularium (307 males, 162 females, 73 nymphs and 32 larvae) and 179 a. pseudoconcolor (96 males, 74 females, 4 nymphs and 5 larvae). apart from an adult a. pseudoconcolor found on a bird, nothura maculosa temminck, 1815, all ticks were found on mammals. the great m ... | 2003 | 14580065 |
| ehrlichia prevalence in amblyomma americanum, central texas. | | 2004 | 15338551 |
| feeding predilection of gulf coast tick, amblyomma maculatum koch, nymphs on cattle. | gulf coast tick nymphs successfully attached and fed on cattle after being freely released. six hereford heifers were each infested with approximately 2000 gulf coast tick nymphs, three with a strain originating from refugio co., tx, and three with ticks from osage co., ks by free release on the head and legs to simulate field acquisition of questing nymphs. two re-infestations were conducted, the first at 7 days and the second at 28 days. nymph dispersal was estimated by daily inspection of 22 ... | 2005 | 15993001 |
| parasites of the collared peccary from texas. | results of a survey of the parasites of the collared peccary (dicotyles tajacu angulatus) in texas are presented. three ectoparasites, amblyomma cajennense, dermacentor variabilis, and pulex porcinus were very common on peccaries from south texas, but less common or absent in arid west texas. sucking lice, pecaroecus javalii, were common on peccaries from west texas, but were not found in south texas. the known range of this louse in texas is extended into the big bend area. two ticks, amnblyomm ... | 1970 | 16509125 |
| mating success of two geographically distinct populations of gulf coast ticks, amblyomma maculatum koch. | gulf coast ticks collected from refugio co., tx and osage co., ks are reproductively compatible despite differences in genetic haplotypes, geographic separation and seasonal phenologies. two heifers per mating combination (tx males x tx females, ks males x ks females, tx males x ks females, ks males x tx females) were each infested with 360 pairs of gulf coast ticks. only mean pre-oviposition and mean egg conversion efficiency index for the texas male-kansas female mating were significantly diff ... | 2006 | 16713094 |
| field collection and genetic classification of tick-borne rickettsiae and rickettsiae-like pathogens from south texas: coxiella burnetii isolated from field-collected amblyomma cajennense. | we are reporting the first known isolation of the q-fever agent coxiella burnetii from field-collected cayenne ticks amblyomma cajennense in north america. q-fever affects a number of domestic ungulates where it can lead to abortion in sheep and goats. there is far less known about the disease's effects on wild species, primarily because of the tendency of the disease to self resolve and to provide long-term immunity to subsequent infections. the first recovery of c. burnetii in north america wa ... | 2008 | 19120212 |
| host selection by questing female amblyomma maculatum koch, to cattle with feeding male ticks in southern texas. | the feeding associations among male and female gulf coast ticks, amblyomma maculatum koch, were examined using archived data obtained from untreated free-ranging cattle pastured on native rangeland. there was significant evidence of a relationship between male and female tick presence on hosts (p-value <0.0001), suggesting that a. maculatum females will more frequently be attracted and attach to grazing cattle with feeding males than those without. seasonal data were tested to develop prediction ... | 2010 | 20627588 |
| amblyomma triste (acari: ixodidae): new north american collection records, including the first from the united states. | new distribution records for the neotropical tick, amblyomma triste koch, are identified from 27 specimens in 18 separate collections. these collections originated from six now recognized geographical foci in two states in the united states (cochise and santa cruz counties, arizona, and brewster and jeff davis counties, texas) and from import cattle, bos taurus l., presented for entry at the united states border and originating in three mexican states (coahuila, durango, and sonora). for at leas ... | 2010 | 20695268 |
| meteorological indicators for amblyomma cajennense and population dynamics in the tamaulipan biotic province in texas. | we studied the population dynamics of free-living ticks in the tamaulipan biotic province in south texas from march, 2005 to november, 2008. we collected 70,873 ticks using carbon dioxide traps. amblyomma cajennense represented 93.6% of the ticks identified. a. cajennense is distributed from northern argentina to south texas in the tamaulipan biotic province. emergence of larval a. cajennense ticks was observed two to five weeks after significant rain events (p<0.0001) and had a strong negative ... | 2011 | 21635651 |
| equine piroplasmosis associated with amblyomma cajennense ticks, texas, usa. | we report an outbreak of equine piroplasmosis in southern texas, usa, in 2009. infection prevalence reached 100% in some areas (292 infected horses). amblyomma cajennense was the predominant tick and experimentally transmitted theileria equi to an uninfected horse. we suggest that transmission by this tick species played a role in this outbreak. | 2011 | 22000367 |