dna analysis of borrelia burgdorferi nch-1, the first northcentral u.s. human lyme disease isolate.the dna of the first northcentral united states human lyme disease isolate, borrellia burgdorferi nch-1, was characterized and compared with the dnas of nine other b. burgdorferi isolates. strain nch-1 was isolated in august 1989 from a human skin biopsy specimen. dna was analyzed by pulsed-field gel electrophoresis and restriction endonuclease analysis. contour-clamped homogeneous electric field pulsed-field gel electrophoresis of in situ-lysed cells was performed to compare the plasmid profile ...19921551988
deer, ticks, and lyme disease. 19921574226
incidence and prevalence of lyme disease in a suburban westchester county community.this study was designed to determine the incidence and prevalence of lyme disease in a section of chappaqua, ny, a residential community in which lyme disease is epidemic, and to identify risk factors for this disease. on the basis of clinical history and baseline serologic testing, the overall prevalence of lyme disease for 114 persons entering the study was 8.8%. the incidence during the 5-month study period of may through september 1989 was 2.6%; all three incident cases had erythema migrans ...19921574232
babesiosis: an underdiagnosed disease of children.babesiosis is a malaria-like illness caused by the intraerythrocytic parasite babesia microti and is transmitted by the same tick that transmits borrelia burgdorferi, the causative agent of lyme disease. babesiosis is well recognized in adult residents of southern new england and new york but has been described in only five children. to determine whether children are infected with b microti less often than are adults, a prospective serosurvey was carried out on block island, ri, where babesiosis ...19921594345
a comparison of methods for sampling the deer tick, ixodes dammini, in a lyme disease endemic area.the purpose of this study was to compare the trapping and examining of mice, drag sampling, and co2-baited traps for their ability to detect the presence and abundance of immature deer ticks, ixodes dammini, in a lyme disease endemic area in southern new york state. eight study sites were sampled 14 times between 28 may and 31 august by setting 49 live-traps, four co2-baited traps, and drag sampling 500 m2. a total of 1540 nymphs and 3079 larvae was collected during the study. drag sampling coll ...19921638929
perspective on the development of vaccines against lyme disease.lyme disease, the multisystem illness caused by the tick-borne spirochaete, borrelia burgdorferi, has emerged as a threat to public health worldwide. it is a particularly vexing problem in the united states where it is growing in range and intensity. in fact, in some hyperendemic regions of new york and new england, lyme disease is now such a threat that it interferes with all sorts of outdoor activities, and has even led to depreciation of real estate values. family dogs in these areas seem to ...19911771965
the geographic spread and temporal increase of the lyme disease describe the temporal and geographic progression of the lyme disease epidemic in new york state from 1977 through 1989.19911870248
evaluation of host-targeted acaricide for reducing risk of lyme disease in southern new york state.a 2-yr evaluation of a commercial product designed to reduce the risk of lyme disease by delivering permethrin-treated cotton to white-footed mice (peromyscus leucopus) was conducted at three sites in westchester county, n.y., an area where lyme disease is endemic. we examined the numbers of host-seeking nymphal ixodes dammini spielman, clifford, piesman & corwin, the numbers of larval i. dammini infesting mice, and the proportion of nymphs infected with borrelia burgdorferi, the causative agent ...19911941916
landscape ecology of lyme disease in a residential area of westchester county, new york.the landscape ecology of lyme disease was studied in 1989 on 67 residences in an endemic area of armonk, westchester county, a northern suburb of new york city. four main habitat types were defined, and each property was surveyed for immature and adult lxodes dammini ticks; 98.6% of 1,790 ticks collected were i. dammini. overall, 67.3% were collected from woods, 21.6% from ecotone (unmaintained edge), 9.1% from ornamental vegetation, and 2% from lawns. larval ticks were concentrated in woods, bu ...19912035514
interlaboratory and intralaboratory comparisons of indirect immunofluorescence assays for serodiagnosis of lyme disease.a conventional indirect immunofluorescence assay (ifa) and an anticomplement indirect immunofluorescence assay (acif) for detecting serum antibodies to borrelia burgdorferi in humans were evaluated during a prevalence survey in northern california. sera obtained from 119 current or former residents of an area in which lyme disease is endemic were split and tested by the ifa in two laboratories and the acif in a third. the seropositivity rate ranged from 15 to 20% with 88 to 93% agreement among l ...19902203813
lyme disease in childhood: clinical and epidemiologic features of ninety 1982 and 1983 practicing pediatricians in a lyme disease-endemic county, reported 90 cases of lyme disease among children 19 years of age and younger (median age, 9 years). three-fourths of the children had initial symptom onset in the summer months, with peak incidence in july. infection occurred twice as often in boys than in girls, and tick bites were recalled by less than half (49%) of the children or parents. erythema chronicum migrans was present in two-thirds (67%) of the cases with me ...19902300409
serologic survey for borrelia burgdorferi antibody in horses referred to a mid-atlantic veterinary teaching hospital.blood samples obtained from 13 of 100 (13%) and 6 of 91 (7%) horses at the george d. widener hospital for large animals in the months of june and october, respectively, had antibody to borrelia burgdorferi as determined by elisa. horses from the states of new york, maryland, delaware, new jersey, and pennsylvania were seropositive for b burgdorferi. the frequency of antibody response in horses from new jersey was greater (p less than 0.05) than the frequency of antibody response in horses from p ...19902332371
the role of medium-sized mammals as reservoirs of borrelia burgdorferi in southern new york.the ability of raccoons (procyon lotor), striped skunks (mephitis mephitis) and opossums (didelphis virginiana) to serve as reservoirs of borrelia burgdorferi, the spirochetal agent of lyme disease, was compared with that of white-footed mice (peromyscus leucopus). twenty-eight (28) medium-sized mammals and 34 white-footed mice were captured in westchester county, new york (usa) in summer 1986. animals were caged over pans of water for 1 to 2 days to recover engorged tick larvae (ixodes dammini) ...19902388356
detection of borrelia burgdorferi dna in museum specimens of ixodes dammini order to investigate the potential for borrelia burgdorferi infection before the recognition of lyme disease as a clinical entity, the polymerase chain reaction (pcr) was used to examine museum specimens of ixodes dammini (deer ticks) for the presence of spirochete-specific dna sequences. one hundred and thirty-six archival tick specimens were obtained representing various continental u.s. locations; dna sequences characteristic of modern day isolates of b. burgdorferi were detected in 13 194 ...19902402635
habitat distribution of ixodes dammini (acari: ixodidae) an lyme disease spirochetes on fire island, new york.the distributions of ixodes dammini spielman, clifford, piesman, and corwin and lyme disease spirochetes were studied on fire island, n.y. adult ticks were more common in high-shrub habitats (shrubby vegetation greater than or equal to 1 m high) than in grassy and lowshrub habitats (vegetation less than 1 m) in spring and fall. in the fall, adults were also common in the woods. adults were more abundant on narrow trails than in nearby vegetation. during the summer, questing nymphs and larvae wer ...19892724316
host associations of ticks (acari: ixodidae) parasitizing medium-sized mammals in a lyme disease endemic area of southern new york.ticks of eight medium-sized mammal species were studied in an area of endemic lyme disease in westchester county, n.y., from 1 april 1984 to 31 march 1985. most (81%) of the 266 total mammal captures were raccoon, procyon lotor (l.) (47%), opossum, didelphis virginiana (kerr) (19%), and striped skunk, mephitis mephitis schreber (15%); these host species accounted for 91% of the 1,519 ticks collected. although the total number of ticks was rather evenly distributed among these mammals, species co ...19892724317
potential for exposure to tick bites in recreational parks in a lyme disease endemic area.eight recreational parks located in a lyme disease endemic area of southern new york state were surveyed for the presence of ticks during the summer of 1985 by drag sampling. ixodes dammini, the primary vector of lyme disease in the northeast, was found in all but one park and accounted for 580 (91.8 per cent) of the 632 ticks collected. of these, 18 per cent were larvae, 80 per cent were nymphs, and 2 per cent were adults. an i. dammini encounter distance, defined as the mean number of meters t ...19892909174
new borrelia burgdorferi antigenic variant isolated from ixodes dammini from upstate new york.a previously undescribed borrelia burgdorferi antigenic variant was isolated from each of four ixodes dammini larvae removed from white-footed mice, peromyscus leucopus, captured in millbrook, n.y. this site is in the northern range of the known distribution of the tick in the northeastern united states. the molecular weights of approximately 32,500 and 35,500 for outer surface a and outer surface b proteins, respectively, were distinctly higher than those for previously characterized isolates f ...19883183008
ticks parasitizing humans in a lyme disease endemic area of southern new york state.a total of 126 tick specimens were submitted by tick bite victims to the westchester county department of health, white plains, new york, and to the new york medical college, medical entomology laboratory, armonk, new york, during 1985. these included 96 (76.2%) ixodes dammini, 26 (20.6%) dermacentor variabilis, and two (1.6%) amblyomma americanum. i. dammini parasitism was reported during all months of the year except december and february and involved all life stages. only d. variabilis adults ...19883189288
the geographic distribution of lyme disease in the united 1982, national surveillance for lyme disease was established by the centers for disease control to monitor trends and determine endemic geographic areas. initially, the endemic areas corresponded to the known distribution of ixodes dammini, a five-state area of the northeastern seaboard (new york, new jersey, connecticut, rhode island, and massachusetts) and wisconsin and minnesota. increasing numbers of cases have been reported outside these areas, however, 86% of the provisional 5731 cases ...19883190099
occupational risk of lyme disease in endemic areas of new york state.although lyme disease (ld) is the most common tick-borne disease in the united states, little is known about the frequency of and risk factors for infection with borrelia burgdorferi in occupational groups. in 1986, we recruited primarily outdoor workers from six employee groups in southeastern new york where ld is endemic. of 414 participants who completed questionnaires and had blood samples tested for antibodies against b. burgdorferi by elisa and western immunoblot, 27 (6.5%) were seropositi ...19883190100
borreliosis in equids in northeastern united states.during 1982 and 1985, blood samples from 705 equids were examined for antibodies to borrelia burgdorferi. by indirect immunofluorescence staining, igm and total immunoglobulin (igm and igg) antibodies were detected in 37 (5.3%) and 90 (12.8%) serum specimens, respectively. the geometric mean titer for igm antibody (140.4) was highest during july, whereas total immunoglobulin ranged from 94.1 in october to 338 in may. eighty-six equids with total immunoglobulin to b burgdorferi lived in areas of ...19883282461
clinical and serologic studies of canine borreliosis.during 1984 and 1985, blood samples were obtained from 271 dogs that were suspected of having borreliosis. the dogs lived in areas known to be infested with ticks and had been examined because of limb/joint disorders or for unknown illnesses marked by fever, anorexia, or fatigue. lameness had been the most frequently reported clinical manifestation. analyses of serum specimens, by an indirect fluorescent antibody (ifa) method or by an elisa, detected antibodies to borrelia burgdorferi, the etiol ...19873319989
prevalence of ixodes dammini near the homes of lyme disease patients in westchester county, new york.cases of lyme disease that occurred in westchester county, an affluent suburb north of new york city, in 1983 were investigated in 1983 and 1984 to determine the presence of ixodes dammini (acari: ixodidae) in the vicinity of the patients' homes. small mammal trapping, drag cloth, and carbon dioxide-baited tick traps were used to sample ticks. in all but one of 11 cases investigated, i. dammini was found on or near well-maintained lawns in the immediate vicinity of the residences. a mark-release ...19883354547
serologic analyses of peromyscus leucopus, a rodent reservoir for borrelia burgdorferi, in northeastern united enzyme-linked immunosorbent assay (elisa) and indirect fluorescent-antibody test were used to detect antibodies to borrelia burgdorferi, the causative agent of lyme disease, in peromyscus leucopus (white-footed mouse). of the 661 mice captured in connecticut, rhode island, and new york during 1980 and 1983 to 1987, 166 (25.1%) had antibodies to b. burgdorferi by elisa. comparative analyses of 210 serum specimens, collected in areas where lyme disease is endemic, revealed a threefold differenc ...19883384925
spirochetes in ticks and antibodies to borrelia burgdorferi in white-tailed deer from connecticut, new york state, and north carolina.ticks were screened for spirochetes and serum samples from white-tailed deer (odocoileus virginianus) were assayed for antibodies to borrelia burgdorferi during 1983-1984. using fluorescein isothiocyanate-labeled rabbit antibodies produced to b. burgdorferi, the etiologic agent of lyme disease, spirochetes were detected in ixodes dammini (10.5% of 1,193) and dermacentor albipictus (0.6% of 157) adults from connecticut, i. dammini nymphs (49.1% of 108) and adults (64.7% of 99) from armonk, new yo ...19863520030
the prevalence and significance of borrelia burgdorferi in the urine of feral reservoir borrelia burgdorferi were isolated from the blood and/or urine of white-footed mice (peromyscus leucopus) collected on shelter island, new york, in 1984 and 1985. prevalence of spirochetes in urine was consistently higher than in blood or both fluids simultaneously. spirochetes remained viable for 18-24 hours in urine and were maintained in culture for one week. mice removed from the field were spirocheturic for at least 13 months. one spirocheturic mouse developed spirochetemia one month a ...19863577491
comparison of rates of infection by the lyme disease spirochete in selected populations of ixodes dammini and amblyomma americanum (acari: ixodidae).at a major endemic focus in new jersey, 50% of 290 adult ixodes dammini collected in the fall of 1984 were infected with the lyme disease spirochete (borrelia burgdorferi), which was statistically higher than the rate found in the 202 adult ticks (39.6%) examined during the spring. neither sex nor site of collection within the focus significantly affected the infection rate. the observed infection rates were similar to those reported in endemic areas of new york and connecticut. borrelia burgdor ...19863577494
ixodes dammini and borrelia burgdorferi in northern new england and upstate new york. 19873585637
clinical and geographic characteristics of lyme disease in new york.the clinical and geographic characteristics of 679 patients who met the clinical definition of lyme disease and who had antibody titers of greater than or equal to 1: 128 to borrelia burgdorferi for a two year period, 1983-1984, are described. males outnumbered females 60% to 40% for the two year period and nearly half of all cases were children and young adults nineteen years old or younger. forty percent of the patients reported single or multiple tick bites prior to the onset of illness and t ...19873591104
prevalence of the lyme disease spirochete in populations of white-tailed deer and white-footed mice.the prevalence of the ixodes dammini spirochete (ids) in white-tailed deer (odocoileus virginianus) and white-footed mice (peromyscus leucopus) was studied on the eastern end of long island, new york. both species commonly occur in a variety of habitats, are preferred hosts of ixodes dammini, and can harbor the spirochetes in the blood. each animal was examined for spirochetemia, tick infestation, and ids infection rates in the ticks that were removed from it. the results obtained suggest that i ...19846516461
spirochete-associated arthritis (lyme disease) in a dog. 19846746395
maternal lyme disease and congenital malformations: a cord blood serosurvey in endemic and control areas.this report describes a cohort study of over 5000 infants and their mothers who participated in a cord blood serosurvey designed to examine the relationship between maternal exposure to lyme disease and adverse pregnancy outcome. based on serology and reported clinical history, mothers of infants in an endemic hospital cohort are 5 to 20 times more likely to have been exposed to b. burgdorferi as compared with mothers of infants in a control hospital cohort. the incidence of total congenital mal ...19957479280
genotypic and phenotypic characterization of borrelia burgdorferi isolated from ticks and small animals in illinois.we have characterized 33 isolates of borrelia burgdorferi from northern illinois (32 isolates) and wisconsin (1 isolate) representing the largest series of midwestern isolates investigated to date. the techniques used for molecular analysis of strains included (i) genospecies typing with species-specific pcr primers, (ii) plasmid profiling by pulsed-field gel electrophoresis of total genomic dna, (iii) large-restriction-fragment pattern (lrfp) analysis by pulsed-field gel electrophoresis of mlui ...19957494019
evaluation of ixodes scapularis, amblyomma americanum, and dermacentor variabilis (acari: ixodidae) from georgia as vectors of a florida strain of the lyme disease spirochete, borrelia burgdorferi.the ability of three common tick species from georgia to maintain and transmit the causative agent of lyme disease, borrelia burgdorferi, was compared under laboratory conditions. a b. burgdorferi cotton rat isolate (mi-6) from florida was selected as a strain from the south, and the sh2-82 isolate from new york was used as a positive control. amblyomma americanum (l.) and dermacentor variabilis (say) did not transmit the mi-6 isolate from inoculated hamsters to naive laboratory mice, and nympha ...19957650697
increase in abundance of immature ixodes scapularis (acari: ixodidae) in an emergent lyme disease endemic area.changes in the abundance of immature ixodes scapularis say, the primary vector of lyme disease, were assessed over a 7-yr period in westchester county, new york, where the disease is endemic. in total, 4,000 m2 were drag sampled at each of 6 study sites in june and july of 1984 and 1991. the abundance of nymphs collected from all sites was 2.6-fold greater in 1991 than in 1984. four of the 6 sites had significantly more nymphs in 1991, with increases ranging from 1.1- to 46.5-fold. the abundance ...19957650715
cultivation of borrelia burgdorferi from human tick bite sites: a guide to the risk of infection.the risk of acquiring lyme disease has been evaluated by xenodiagnostic procedures with laboratory strains of borrelia burgdorferi and laboratory-reared ixodes ticks, or by clinical trials in which diagnosis was based on clinical findings, culture, or serologic tests.19957829700
comparative analysis of genetic variability among borrelia burgdorferi isolates from europe and the united states by restriction enzyme analysis, gene restriction fragment length polymorphism, and pulsed-field gel electrophoresis.the genomes of 62 north american and european borrelia burgdorferi isolates were examined by restriction endonuclease analysis (rea), gene probe restriction fragment length polymorphism, and pulsed-field gel electrophoresis (pfge). hybridization of restriction fragments with the immunologically relevant 83-kda antigen gene revealed polymorphisms and divided the isolates into three major groups. group i included all but two of the american isolates and some of the european isolates. one of two ca ...19937905881
childhood neurologic disorders and lyme disease during determine the prevalence of clinically significant nervous system disease attributable to transplacental transmission of borrelia burgdorferi, we surveyed neurologists in areas of the united states in which lyme disease is endemic (i.e., massachusetts, rhode island, connecticut, new york, new jersey, wisconsin, and minnesota). overall, 162 of the 176 (92%) pediatric neurologists contacted responded to the survey with a range of 90-100% in the different geographic areas. one pediatric neurolog ...19947986291
lyme disease: an infectious and postinfectious determine chronic morbidity and the variables that influence recovery in patients who had been treated for lyme disease.19948006888
lyme disease: a growing threat to urban populations.lyme disease or lyme borreliosis, which is caused by three groups of the spirochete borrelia burgdorferi, is transmitted in north america, europe, and asia by ticks of the ixodes ricinus complex. the primary areas around the world that are now affected by lyme disease are near the terminal moraine of the glaciers 15,000 years ago. the emergence of lyme disease in the united states in this century is thought to have occurred because of ecological conditions favorable for deer. from 1982 through 1 ...19948146126
ixodes scapularis (acari: ixodidae) deer tick mesoscale populations in natural areas: effects of deer, area, and location.nymphal ixodes scapularis say deer ticks were collected at 22 parks or other natural areas on long island, new york, to examine the relationship between tick populations and geographic position, size of area, presence of white-tailed deer, odocoileus virginianus (zimmerman), and numbers of human lyme disease cases in adjacent communities. nymphal ticks were 93% less abundant when deer were absent and were also less common in smaller natural areas. geographic position on long island was not impor ...19948158618
reduced abundance of ixodes scapularis (acari: ixodidae) and lyme disease risk by deer exclusion.the effect of deer exclosures upon the numbers of immature ixodes scapularis say, the vector of lyme disease in the eastern united states, was examined at five sites in westchester county, ny. study areas ranged in size from 6 to 101 ha where deer had been excluded for a period of 25 yr by > 2.4-m-high fencing that surrounded each site. a total area of 40,506 m2 was drag-sampled during the study to measure tick abundance. nymphal densities (ticks per 1,000 m2) averaged 4.6 (range, 1.3-9.6) insid ...19938271246
serological responses in lyme disease: the influence of sex, age, and the laboratory, the serodiagnosis of lyme disease is a difficult decision, especially in early disease. the variability in the immune response to the borrelia burgdorferi spirochete and the lack of specificity and sensitivity of commercial assays for the detection of antibodies in early disease have contributed to the difficulty of serodiagnosis. this study examines the serological data of over 20,000 serum specimens submitted for enzyme linked immunosorbent assay (elisa) and/or western blot ...19938323257
relative importance of bird species as hosts for immature ixodes dammini (acari: ixodidae) in a suburban residential landscape of southern new york state.abundance of birds and their tick parasites were estimated in a residential community located in westchester county, ny, where lyme disease is endemic. in total, 36 bird species (416 captures) were collected, of which 25 species (69%) were parasitized by ticks. ixodes dammini spielman, clifford, piesman & corwin composed 96.4% of the 1,067 ticks found on birds. the bird species most heavily parasitized was house wren, troglodytes aedon vieillot (11.1 ixodes dammini per bird). relative density es ...19938360897
lyme disease and pregnancy outcome: a prospective study of two thousand prenatal patients.the purpose of the study was to determine if prenatal exposure to lyme disease was associated with an increased risk of adverse pregnancy outcome.19938362948
the distribution of canine exposure to borrelia burgdorferi in a lyme-disease endemic area.a serosurvey of canine exposure to borrelia burgdorferi, the causative agent of human lyme disease, was conducted in westchester county, new york, to determine the distribution of exposure in an area endemic for lyme disease.19938363007
entomologic and demographic correlates of anti-tick saliva antibody in a prospective study of tick bite subjects in westchester county, new york.we measured anti-tick saliva antibody (atsa) by enzyme-linked immunosorbent assay using whole sonicated ixodes dammini salivary glands as antigen in subjects with 1) a recent and confirmed i. dammini (n = 100) or dermacentor variabilis bite (n = 3), 2) erythema migrans (n = 15), 3) late-stage lyme disease (n = 4), and 4) normal controls without a history of tick bites (n = 5). tick bite subjects had three atsa determinations over approximately six weeks. on the first atsa measurement at a mean + ...19938427388
canine exposure to borrelia burgdorferi and prevalence of ixodes dammini (acari: ixodidae) on deer as a measure of lyme disease risk in the northeastern united states.surveillance programs that identify areas where both the vector (ixodes dammini) and etiologic agent (borrelia burgdorferi) are present may identify the risk of lyme disease and its spread earlier and more accurately than do programs relying on any single method, particularly human case reports. hunter-killed deer (n = 1,204) from 22 counties in maryland, massachusetts, new hampshire, new york, and pennsylvania were examined in fall 1989 and all ectoparasites were identified. the following sprin ...19938433324
occurrence and distribution in rhode island of hunterellus hookeri (hymenoptera: encyrtidae), a wasp parasitoid of ixodes dammini.the wasp hunterellus hookeri howard parasitizes several species of ixodid ticks including ixodes dammini spielman, clifford, piesman & corwin, the vector of lyme disease spirochetes, borrelia burgdorferi, in the northeastern united states. we detected the occurrence and evaluated the distribution of this wasp parasitoid in populations of i. dammini in rhode island. there has been no intentional introduction of a tick parasitoid recorded anywhere in rhode island; yet, we found this wasp at one of ...19938433338
two geographically distinct isolates of borrelia burgdorferi from the united states share a common unique ancestor.the genetic diversity of borrelia burgdorferi isolates from several geographic regions was evaluated by nucleotide sequence analysis of the genes encoding 23s ribosomal rna and outer surface protein a. comparison of nucleotide sequences spanning 738 bp of the 23s ribosomal dna from two unusual isolates, dn127 (del norte county, california) and 25015 (millbrook, new york), to homologous sequences from other b. burgdorferi isolates from the united states and russia identified several nucleotide se ...19958525058
duration of tick bites in a lyme disease-endemic area.regression equations, based on scutal index (body length/scutal width), were developed to determine the duration of attachment for nymphal and adult female lxodes scapularis ticks. feeding times were calculated for 444 nymphal and 300 female ticks submitted by bite victims between 1985 and 1989 in westchester county, new york, an area where lyme disease is highly endemic. nymphs were attached for a mean of 34.7 hours, with 26.8% removed after 48 hours, the critical time for transmission of borre ...19968546120
application of desiccant and insecticidal soap treatments to control ixodes scapularis (acari: ixodidae) nymphs and adults in a hyperendemic woodland site.the desiccant drione (1% pyrethrin) and safer's insecticidal soap (0.2% pyrethrin) formulated with and without isopropyl alcohol (roh) were field tested against nymphal and adult populations of ixodes scapularis say in a hyperendemic woodlot in westchester county, new york. drione, insecticidal soap, and insecticidal soap with roh provided equivalent levels of control for nymphs and adults. compared with untreated plots, nymphal populations were significantly reduced 1 (93.3-100%) and 2 (66.4-85 ...19958551510
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 ...19968568302
analyses of mammalian sera in enzyme-linked immunosorbent assays with different strains of borrelia burgdorferi sensu lato.blood samples were collected from cottontail rabbits (sylvilagus floridanus), raccoons (procyon lotor), white-footed mice (peromyscus leucopus), and white-tailed deer (odocoileus virginianus) between 1977 and 1991 in southern connecticut and new york state (usa) and were tested for antibodies against eight strains of borrelia burgdorferi sensu lato in enzyme-linked immunosorbent assays. among these spirochetes were six strains of b. burgdorferi sensu stricto, one strain of b. garinii (=ip90) and ...19958583632
molecular typing of borrelia burgdorferi from lyme disease patients by pcr-restriction fragment length polymorphism analysis.ninety-three borrelia burgdorferi isolates obtained from erythema migrans lesions or blood of lyme disease patients in westchester county, n.y., between 1991 and 1994 were characterized by pcr-restriction fragment length polymorphism (pcr-rflp) analysis of the 16s-23s rrna gene spacer. all isolates could be classified into three distinct rflp types. among the 82 skin biopsy isolates studied, 21 (25.6%) were type 1, 37 (45.1%) were type 2, and 21 (25.6%) were type 3. three (3.7%) cultures contain ...19968727927
timing of ixodes scapularis (acari: ixodidae) oviposition and larval activity in southern new york.timing of oviposition and larval eclosion for fall- and spring-fed female blacklegged tick, ixodes scapularis say, and effect of temperature on those events in southern new york state, where lyme disease is endemic, were determined in the field. we also examined seasonal pattern of larval host-seeking activity, as well as rate of survival for overwintering, unfed larvae. totals of 9 and 8 replete female i. scapularis were released in fall 1988 and spring 1989, respectively. for the 10 females th ...19968906918
transmission of the agent of human granulocytic ehrlichiosis by host-seeking ixodus scapularis (acari:ixodidae) in southern new york state.ixodes scapularis say nymphs collected from a natural focus of human granulocytic ehrlichiosis (hge) in westchester county, new york, transmitted the hge agent to uninfected mice in the laboratory. infection was demonstrated in 3 of 8 mice by polymerase chain reaction analysis of whole blood and microscopic examination of blood smears for morulae. two of these mice were also positive by xenodiagnosis. positive xenodiagnostic larvae maintained infection through molting and transferred infection t ...19979220669
serological responses to ehrlichia equi, ehrlichia chaffeensis, and borrelia burgdorferi in patients from new york state.serological testing at the new york state department of health for human granulocytic ehrlichiosis in the residents of westchester county, n.y., was performed with specimens from 176 patients by the indirect fluorescent-antibody (ifa) technique with ehrlichia equi mrk-infected neutrophils. to understand whether human monocytotropic ehrlichiosis also occurs in this northeastern geographic region, specimens were also tested for antibodies to ehrlichia chaffeensis arkansas. screening tests and immu ...19979276387
deer ticks (ixodes scapularis) and the agents of lyme disease and human granulocytic ehrlichiosis in a new york city park.rodent trapping and drag sampling in van cortlandt park, new york city, yielded all stages of ixodes scapularis, the deer tick vector of lyme disease and human granulocytic ehrlichiosis (hge). polymerase chain reaction analyses of the ticks showed borrelia burgdorferi and the ehrlichia sp. that causes hge.19979284380
antibodies to ehrlichia equi in dogs from the northeastern united determine whether dogs living in tickinfested areas of the northeastern united states had been exposed to ehrlichia equi, an etiologic agent of granulocytic ehrlichiosis.19979364226
screening for lyme disease in hospitalized psychiatric patients: prospective serosurvey in an endemic area.nervous system involvement in lyme disease may mimic certain psychiatric disorders. we studied whether it is worthwhile to conduct routine screening of psychiatric inpatients for serologic evidence of lyme disease.19979364837
landscape characterization of peridomestic risk for lyme disease using satellite imagery.remotely sensed characterizations of landscape composition were evaluated for lyme disease exposure risk on 337 residential properties in two communities of suburban westchester county, new york. properties were categorized as no, low, or high risk based on seasonally adjusted densities of ixodes scapularis nymphs, determined by drag sampling during june and july 1990. spectral indices based on landsat thematic mapper data provided relative measures of vegetation structure and moisture (wetness) ...19979430528
new distribution records of amblyomma americanum (l.) (acari: ixodidae) in new york state.amblyomma americanum, commonly called the lone star tick, has been widely-distributed in the southeastern united states for many years. distribution of this species apparently did not extend to new york state until the 1970s, after which the northern distribution in new york was limited to long island (suffolk and nassau counties), where it has become locally abundant. since then, there has been just one published record from new york state, in westchester county, just north of new york city. fr ...19979491364
detection of human granulocytic ehrlichiosis agent and borrelia burgdorferi in ticks by polymerase chain ixodid ticks were collected from westchester county, new york, and ipswich, massachusetts, to determine the presence of infection with a human granulocytic ehrlichiosis (hge) agent by using the polymerase chain reaction (pcr). the presence of borrelia burgdorferi in ticks collected from new york was also determined by pcr. of the 229 ticks from new york and 47 ticks from massachusetts, 9% (22/229) and 25% (12/47) of ticks contained hge agent, respectively. fifty-four percent (123/229) of t ...19989526861
coinfection of blacklegged ticks (acari: ixodidae) in dutchess county, new york, with the agents of lyme disease and human granulocytic blacklegged ticks, ixodes scapularis say, collected from forested sites in dutchess county, ny, were tested for infection with the etiologic agents of lyme disease, borrelia burgdorferi johnson, schmid, hyde, steigerwalt & brenner, and human granulocytic ehrlichiosis (hge). rates of infection with the 2 pathogens were high and independent of one another, confirming prior findings and suggesting that a variety of hosts may be competent reservoirs of the hge agent.19989775627
estimation of the incidence of lyme disease.the incidence of lyme disease in most endemic areas is unknown but will be an important factor in determining the cost-effectiveness of lyme disease vaccines in those areas. the authors developed a deterministic model with nine components to estimate the frequency of ixodes scapularis tick bites and the resulting incidence of lyme disease in residents of endemic areas. for each component, best point estimates and plausible ranges of values were based on the published literature, unpublished data ...19989829875
geographic risk for lyme disease and human granulocytic ehrlichiosis in southern new york state.ixodes scapularis, the tick vector of lyme disease and human granulocytic ehrlichiosis (hge), is prevalent in much of southern new york state. the distribution of this species has increased, as have reported cases of both lyme disease and hge. the unreliability of case reports, however, demonstrates the need for tick and pathogen surveillance in order to accurately define areas of high risk. in this study, a total of 89,550 m2 at 34 study sites was drag sampled in 1995 and a total of 51,540 m2 a ...19989835546
a proposal for the reliable culture of borrelia burgdorferi from patients with chronic lyme disease, even from those previously aggressively treated.since culture of borrelia burgdorferi from patients with chronic lyme disease has been an extraordinarily rare event, clarification of the nature of the illness and proving its etiology as infectious have been difficult. a method for reliably and reproducibly culturing b. burgdorferi from the blood of patients with chronic lyme disease was therefore sought by making a controlled blood culture trial studying 47 patients with chronic lyme disease. all had relapsed after long-term oral and intraven ...19989861561
temporal relation between ixodes scapularis abundance and risk for lyme disease associated with erythema migrans.understanding the role that nymphal and female ticks, ixodes scapularis, have in the epidemiology of lyme disease is essential to the development of successful prevention programs. in this study, the authors sought to evaluate the seasonal and annual relations between tick densities and patients > or = 16 years of age diagnosed with erythema migrans (em), the rash associated with early lyme disease. ticks were collected weekly by drag sampling throughout most of the year from 1991 to 1996 in wes ...199910206627
seroprevalence and seroconversion for tick-borne diseases in a high-risk population in the northeast united determine the prevalence of serologic reactivity, the 1-year incidence of seroconversion, and the frequency of multiple infections, and their associations with symptoms in a group of volunteers at high risk for tick-borne infections in new york state.199910225242
molecular characterization of borrelia spp. isolates from greater metropolitan chicago reveals the presence of borrelia bissettii. preliminary report.lyme disease in the us is concentrated in three endemic areas: the northeast, the upper mid-west, and the pacific coast. in the mid-west, the range of lyme disease has expanded to include large parts of wisconsin and minnesota. despite its proximity to the mid-western focus, illinois, so far, has not been considered an endemic area. however, more recent data suggest that this situation may be changing. also, the extent of borrelial diversity in the mid-west remains largely unexplored. here, we p ...200011075925
reactivity of dog sera to whole-cell or recombinant antigens of borrelia burgdorferi by elisa and immunoblot analysis.enzyme-linked immunosorbent assays (elisas) with separate preparations of 10 purified recombinant antigens of borrelia burgdorferi sensu stricto were used to test sera from 36 dogs not vaccinated with whole cells of this agent and from five dogs vaccinated with whole-cell b. burgdorferi bacteria. all dogs lived in tick-infested areas of connecticut and south-eastern new york state, usa. the non-vaccinated dogs had limb or joint disorder, lameness and fever during the period 1984-1991 and had ant ...200111599738
lyme disease in new york state: spatial pattern at a regional scale.lyme disease occurs commonly in new york state, but its geographic distribution is heterogeneous. over each of nine consecutive years, incidence rates from 57 new york state counties were subjected to spatial autocorrelation analysis. although the epidemic advanced during the study period, the analyses reveal a consistent pattern of spatial dependence. the correlation distance, the distance over which incidence rates covary positively, remained near 120 km over the nine years. a local spatial an ...200111716111
comparative study of early lyme disease: erythema migrans in new york state and northeastern poland.the objective was to compare the clinical features of early local lyme disease: erythema migrans (em) between two highly endemic areas: new york state and northeastern poland. study was based on self reporting questionnaires, physical examination, and laboratory results.200211782679
effects of acorn production and mouse abundance on abundance and borrelia burgdorferi infection prevalence of nymphal ixodes scapularis ticks.risk of exposure to lyme disease is a function of the local abundance of nymphal ixodes ticks that are infected with the etiological agent, the spirochete borrelia burgdorferi. we monitored abundance of white-footed mice (the principal b. burgdorferi reservoir in the eastern and central united states) and acorns (a critical food resource for mice), and ixodes scapularis ticks, as well as ambient temperature (cumulative growing degree days) and growing season precipitation, in a forested landscap ...200112653136
long-term follow-up of patients with culture-confirmed lyme determine the long-term outcome of patients with culture-confirmed lyme disease.200312893393
the effects of bird feeders on lyme disease prevalence and density of ixodes scapularis (acari: ixodidae) in a residential area of dutchess county, new york.the effects of bird feeders on local densities of ixodes scapularis ticks and prevalence of lyme disease were examined in residential areas of dutchess county, ny. ticks were collected, counted, and analyzed for borrelia burgdorferi spirochetes in 2001-2002 on residential properties with and without bird feeders. tick densities and infection prevalence were not significantly different on properties with and without bird feeders. furthermore, analysis of a questionnaire, administered to 580 local ...200314680124
microbiologic evaluation of patients from missouri with erythema migrans.borrelia lonestari infects amblyomma americanum, the tick species that is the most common cause of tick bites in southeast and south-central united states, and this spirochete has been detected in an erythema migrans (em)-like skin rash in 1 patient. therefore, b. lonestari is considered to be a leading candidate for the etiologic agent of em in this region.200515668867
detection of antibodies to borrelia burgdorferi in naturally infected horses in the usa by enzyme-linked immunosorbent assay using whole-cell and recombinant antigens.blood samples were collected from 98 horses suspected of having borreliosis or granulocytic ehrlichiosis in connecticut and new york state, usa during 1985, 1995, and 1996. serum antibodies to borrelia burgdorferi were detected by an enzyme-linked immunosorbent assay (elisa), based on whole-cell and recombinant antigens, in 82 (84%) horses. of the 181 sera tested, 59% were positive, using whole-cell antigens, compared to 48% with protein (p)37 and 35% with vlse antigens. an elisa containing eith ...200515924926
distribution of borreliae among ticks collected from eastern states.lyme disease is the most commonly reported vector-borne disease in the united states and is transmitted by borrelia burgdorferi-infected ixodes species. the disease is typically characterized by an erythema migrans (em) rash at the site of tick feeding. em rashes have also been associated with feeding by amblyomma americanum ticks despite evidence suggesting that they are incompetent vectors for lyme disease. in 1996, a borrelia organism only recently cultivated in the laboratory was described i ...200516417434
strategies for reducing the risk of lyme borreliosis in north america.the incidence of lyme borreliosis continues to increase in the united states. in 1991, when lyme borreliosis first became a nationally reportable disease to the centers for disease control and prevention (cdc), a total of 9470 cases were reported; in contrast, by 2002 a total of 23,763 cases were reported, >2.5x the total in 1991. area-wide acaricides can be highly effective in killing nymphal ixodes scapularis, with >95% of nymphs killed in studies using cyfluthrin, deltamethrin, or carbaryl. t ...200616524769
molecular analysis of microbial communities identified in different developmental stages of ixodes scapularis ticks from westchester and dutchess counties, new york.ixodes scapularis ticks play an important role in the transmission of a wide variety of pathogens between various mammalian species, including humans. pathogens transmitted by ticks include borrelia, anaplasma and babesia. although ticks may harbour both pathogenic and non-pathogenic microflora, little is known about how the diversity of the microflora within ticks may influence the transmission of pathogens. to begin addressing this question, we examined the composition of bacterial communities ...200616623735
prevalence of borrelia burgdorferi in small mammals in new york state.intensive small mammal trapping was conducted in 12 counties in new york state during 1998-2000 to investigate the prevalence and site specificity of the lyme disease spirochete, borrelia burgdorferi in, and presence of the blacklegged tick, ixodes scapularis say on, the wild mice peromyscus leucopus rafinesque and peromyscus maniculatus wagner and other small mammal species. previously captured mice (1992-1997) from throughout new york state also were recruited into the study, providing a total ...200617017230
serologic evaluation of patients from missouri with erythema migrans-like skin lesions with the c6 lyme test.southern tick-associated rash illness (stari), also known as masters disease, affects people predominantly in the southeast and south central united states. these patients exhibit skin lesions that resemble erythema migrans (em), the characteristic skin lesion in early lyme disease. the etiology of stari remains unknown, and no serologic test is available to aid in its diagnosis. the c6 lyme enzyme-linked immunosorbent assay was used to evaluate coded serum specimens from patients with stari at ...200617028220
lyme disease--united states, 2003-2005.lyme disease is caused by the spirochete borrelia burgdorferi and is transmitted to humans by the bite of infected blacklegged ticks (ixodes spp.). early manifestations of infection include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. left untreated, late manifestations involving the joints, heart, and nervous system can occur. a healthy people 2010 objective (14-8) is to reduce the annual incidence of lyme disease to 9.7 new cases per 100,000 population in 1 ...200717568368
the role of lizards in the ecology of lyme disease in two endemic zones of the northeastern united states.we examined the role of lizards in the ecology of lyme disease in new york and maryland. we collected data on vector tick infestations, measured lizard "realized" reservoir competence for the lyme disease spirochete borrelia burgdorferi, and estimated lizard population density. these data were incorporated into a model that predicts a host's ability to influence the prevalence of b. burgdorferi in the tick population, a primary risk factor in the epidemiology of lyme disease. published data on o ...200717626342
conspicuous impacts of inconspicuous hosts on the lyme disease epidemic.emerging zoonotic pathogens are a constant threat to human health throughout the world. control strategies to protect public health regularly fail, due in part to the tendency to focus on a single host species assumed to be the primary reservoir for a pathogen. here, we present evidence that a diverse set of species can play an important role in determining disease risk to humans using lyme disease as a model. host-targeted public health strategies to control the lyme disease epidemic in north a ...200818029304
borrelia burgdorferi sensu stricto is clonal in patients with early lyme borreliosis.lyme borreliosis, the most commonly reported vector-borne disease in north america, is caused by the spirochete borrelia burgdorferi. given the extensive genetic polymorphism of b. burgdorferi, elucidation of the population genetic structure of the bacterium in clinical samples may be relevant for understanding disease pathogenesis and may have applicability for the development of diagnostic tests and vaccine preparations. in this investigation, the genetic polymorphism of the 16s-23s rrna (rrs- ...200818539816
effect of borrelia burgdorferi genotype on the sensitivity of c6 and 2-tier testing in north american patients with culture-confirmed lyme disease.a potential concern with any serologic test to detect antibodies to borrelia burgdorferi is whether the epitopes incorporated in the test provide sufficient cross-reactivity to detect infection with all of the pathogenic strains of the species. this is a particular concern for the c6 test, which is based on reactivity to a single peptide.200818724824
borrelia burgdorferi genotype predicts the capacity for hematogenous dissemination during early lyme disease.lyme disease, the most common tickborne disease in the united states, is caused exclusively by borrelia burgdorferi sensu stricto in north america. the present study evaluated the genotypes of >400 clinical isolates of b. burgdorferi recovered from patients from suburban new york city with early lyme disease associated with erythema migrans; it is the largest number of borrelial strains from north america ever to be investigated.200818781866
surveillance for lyme disease--united states, 1992-2006.lyme disease is a multisystem disease that occurs in north america, europe, and asia. in the united states, the etiologic agent is borrelia burgdorferi sensu stricto, a spirochete transmitted to humans by infected ixodes scapularis and i. pacificus ticks. the majority of patients with lyme disease develop a characteristic rash, erythema migrans (em), accompanied by symptoms of fever, malaise, fatigue, headache, myalgia, or arthralgia. other manifestations of infection can include arthritis, card ...200818830214
diluting the dilution effect: a spatial lyme model provides evidence for the importance of habitat fragmentation with regard to the risk of infection.this paper aims to construct a spatially-explicit model of ixodes scapularis infection in the state of new york, usa, based on climate traits, high-resolution landscape features and patch-connectivity according to graph theory. the degree of risk for infection is calculated based on empirical data of host abundance, previous studies on host infectivity rates and tick preferences towards a given host. the outcome signifies what is called the "recruitment of infection", i.e. an index representing ...200919440959
acaricidal treatment of white-tailed deer to control ixodes scapularis (acari: ixodidae) in a new york lyme disease-endemic community.the efficacy of topically treating white-tailed deer with an acaricide was evaluated in a lyme disease-endemic community of southern new york state. twenty-four 4-poster feeders were placed in a 5.2 km(2) treatment area in bedford, ny, while a site in lewisboro, ny, 4.8 km distant, served as control. treatment periods ran from 15 september to 15 december each fall from 1997 to 2001, and from 15 march to 15 may each spring from 1998 to 2002. corn consumption averaged 15,779 kg in fall sessions an ...200919650732
assessment of polymicrobial infections in ticks in new york state.ixodes scapularis ticks are clinically important hematophagous vectors. a single tick bite can lead to a polymicrobial infection. we determined the prevalence of polymicrobial infection with borrelia burgdorferi, anaplasma phagocytophilum, babesia microti, borrelia miyamotoi, and powassan virus in 286 adult ticks from the two counties in new york state where lyme disease is endemic, utilizing a masstag multiplex polymerase chain reaction assay. seventy-one percent of the ticks harbored at least ...201019725770
agents of human anaplasmosis and lyme disease at camp ripley, minnesota.the transmission dynamics of anaplasma phagocytophilum (ap) and borrelia burgdorferi (bb) among ixodes scapularis (is) and mammalian hosts was investigated at camp ripley, an area representative of central minnesota. prevalence of white-footed mouse infection with ap and bb were 20% and 42%, respectively, with a coinfection level of 14%. peak levels of infection with both agents occurred in may. the average levels of seropositivity to ap and bb were 29.3% and 48%, respectively. of the mice infec ...201121867420
Southern Tick-Associated Rash Illness (STARI) in the North: STARI following a tick bite in Long Island, New York.The most common clinical manifestation of Lyme disease is the characteristic rash, erythema migrans (EM). In the 1980s EM-like eruptions were reported in Missouri and other southeastern states. The EM-like eruptions, which were of unknown etiology, often followed the bite of the Lone Star tick (Amblyomma americanum) and the rash is called STARI (southern tick-associated rash illness). Although the Lone Star tick is found in the Lyme disease-endemic areas of New England and Mid-Atlantic regions o ...201121940418
Molting success of Ixodes scapularis varies among individual blood meal hosts and species.The blacklegged tick (Ixodes scapularis) is an important vector of emerging human pathogens. It has three blood-feeding stages, as follows: larva, nymph, and adult. Owing to inefficient transovarial transmission, at least for the Lyme disease agent (Borrelia burgdorferi), larval ticks rarely hatch infected, but they can acquire infection during their larval blood meal. Nymphal ticks are primarily responsible for transmitting pathogens to hosts, including humans. The transition from uninfected ho ...201121845946
babesiosis in lower hudson valley, new york, usa.although lyme disease has been endemic to parts of the lower hudson valley of new york, united states, for >2 decades, babesiosis has emerged there only since 2001. the number of lower hudson valley residents in whom babesiosis was diagnosed increased 20-fold, from 6 to 119 cases per year during 2001-2008, compared with an ≈1.6-fold increase for the rest of new york. during 2002-2009, a total of 19 patients with babesiosis were hospitalized on 22 occasions at the regional tertiary care center. c ...201121529393
deer, predators, and the emergence of lyme disease.lyme disease is the most prevalent vector-borne disease in north america, and both the annual incidence and geographic range are increasing. the emergence of lyme disease has been attributed to a century-long recovery of deer, an important reproductive host for adult ticks. however, a growing body of evidence suggests that lyme disease risk may now be more dynamically linked to fluctuations in the abundance of small-mammal hosts that are thought to infect the majority of ticks. the continuing an ...201222711825
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