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cdc should admit possibility of lyme. 19921491660
spatial analysis of the distribution of ixodes dammini (acari: ixodidae) on white-tailed deer in ogle county, illinois.the pattern of infestations of ixodes dammini on white-tailed deer in ogle county in illinois was studied through examinations of hunted deer from 1988 to 1990. the illinois geographic information system mapped the spatial distribution of tick infestations on deer and related it to a known endemic focus for i. dammini and borrelia burgdorferi (castle rock state park), and to a major waterway (rock river). second-order neighborhood analysis was used to analyze the spatial distribution of deer aro ...19921495039
predicting the risk of lyme disease: habitat suitability for ixodes scapularis in the north central united states.the distribution and abundance of ixodes scapularis were studied in wisconsin, northern illinois, and portions of the upper peninsula of michigan by inspecting small mammals for ticks and by collecting questing ticks at 138 locations in state parks and natural areas. environmental data were gathered at a local level (i.e., micro and meso levels), and a geographic information system (gis) was used with several digitized coverages of environmental data to create a habitat profile for each site and ...200211927027
wild birds as sentinels for multiple zoonotic pathogens along an urban to rural gradient in greater chicago, illinois.wild birds are important in the maintenance and transmission of many zoonotic pathogens. with increasing urbanization and the resulting emergence of zoonotic diseases, it is critical to understand the relationships among birds, vectors, zoonotic pathogens, and the urban landscape. here, we use wild birds as sentinels across a gradient of urbanization to understand the relative risk of diseases caused by three types of zoonotic pathogens: salmonella pathogens, mosquito-borne west nile virus (wnv) ...201222353581
spatial and spatio-temporal models for modeling epidemiological data with excess zeros.epidemiological data often include excess zeros. this is particularly the case for data on rare conditions, diseases that are not common in specific areas or specific time periods, and conditions and diseases that are hard to detect or on the rise. in this paper, we provide a review of methods for modeling data with excess zeros with focus on count data, namely hurdle and zero-inflated models, and discuss extensions of these models to data with spatial and spatio-temporal dependence structures. ...201526343696
populations of ixodes scapularis (acari: ixodidae) are modulated by drought at a lyme disease focus in illinois.from 1990 through 1997, ixodes scapularis say larvae and nymphs were sampled between may and october along a 400-m segment of a nature trail in a lyme disease endemic site in northern illinois. ticks were removed from peromyscus leucopus mice and collected via tick drags at approximately 3-wk intervals. mouse population estimates along the trail varied from 2, in the spring of 1996 following a year of drought, to > 200 in 1993, the wettest year on record. during the 8-yr period, there were major ...200015535585
detection, characterization, and prediction of tick-borne disease foci.tick-borne disease (tbd) transmission foci need to be characterized in space and time, and are often discontinuous on both scales. an active tbd focus is dependent on the fulfillment of three conditions: tick survival, pathogen survival and opportunities for human exposure. the essentials for tick survival include food sources, reproduction, and protection from environmental extremes. the pathogen survival kit includes sufficient densities of ticks and suitable reservoir hosts, and opportunities ...200212141734
canine surveillance system for lyme borreliosis in wisconsin and northern illinois: geographic distribution and risk factor analysis.a seroprevalence survey for borrelia burgdorferi was conducted among the healthy canine pet population in selected counties of wisconsin and northern illinois to determine the distribution of lyme disease and associated risk factors. information obtained for each dog included place of residence, lyme disease vaccination status, history of travel and tick exposure, signalment, and medical history. serum samples were screened by enzyme-linked immunosorbent assay and confirmed by an immunoblot proc ...200111716112
status of ixodes dammini (acari: ixodidae) in illinois.ixodes dammini spielman, clifford, piesman & corwin was found for the first time in illinois in november 1987, when two adult females were collected from two deer in jo daviess county in the northwestern corner of the state. in 1988, in a study of six state parks in northern illinois, questing adults and nymphs were encountered in one park in ogle county. during the firearm deer hunt in november 1988, adult female and male ticks were found in several counties, with a high rate of infestation (gr ...19902388231
spatial and temporal dispersion of immature ixodes dammini on peromyscus leucopus in northwestern illinois.infestation by immature ixodes dammini and infection by borrelia burgdorferi of the white-footed mouse peromyscus leucopus were studied in castle rock state park in northwestern illinois during june-october 1990. prevalence and intensity of infestation of larvae on mice were highest in august with a smaller peak in early june. the distribution of larvae on mice was highly aggregated during each of the sampling periods. aggregation appears to be the result of a series of nonrandom successful atta ...19911779300
wild birds and urban ecology of ticks and tick-borne pathogens, chicago, illinois, usa, 2005-2010.bird-facilitated introduction of ticks and associated pathogens is postulated to promote invasion of tick-borne zoonotic diseases into urban areas. results of a longitudinal study conducted in suburban chicago, illinois, usa, during 2005-2010 show that 1.6% of 6,180 wild birds captured in mist nets harbored ticks. tick species in order of abundance were haemaphysalis leporispalustris, ixodes dentatus, and i. scapularis, but 2 neotropical tick species of the genus amblyomma were sampled during th ...201223017244
survey for ixodes spp. and borrelia burgdorferi in southeastern wisconsin and northeastern illinois.forested areas adjacent to milwaukee, wis., and chicago, ill., were investigated for rodents and ticks infected with borrelia burgdorferi, the causative agent of lyme disease. white-footed mice (peromyscus leucopus or peromyscus maniculatus), meadow voles (microtus pennsylvanicus), and eastern chipmunks (tamias striatus) were captured; and specimens from these animals were cultured for b. burgdorferi to define whether the midwestern lyme disease area currently encompasses these large metropolita ...19912007650
isolation and characterization of borrelia burgdorferi from illinois ixodes dammini.ixodes dammini ticks from two northwestern illinois sites were found to be infected with borrelia burgdorferi at rates of 19 and 32%. b. burgdorferi isolates, one from each site, had protein and antigenic patterns similar to those of the b-31 strain. an indirect immunofluorescence method proved to be more sensitive than dark-field microscopy in detection of these spirochetes. a modified bsk medium containing rifampin was found to be more efficient for spirochete isolation than unsupplemented bsk ...19911761698
ixodes scapularis (acari: ixodidae) distribution surveys in the chicago metropolitan region.considering recent studies confirming an increased risk of contracting lyme disease near metropolitan chicago, we surveyed a more comprehensive area to assess whether the geographical distribution and establishment of ixodes scapularis (say) populations across northeast illinois are widespread or limited in occurrence. from may through october 2008 and from april through october 2009, 602 i. scapularis ticks of all three life stages (larva, nymph, adult) were collected from sites in cook, dupage ...201222897059
assessing the contribution of songbirds to the movement of ticks and borrelia burgdorferi in the midwestern united states during fall migration.the geographic distributions of ixodes scapularis (black-legged tick) and the bacterium borrelia burgdorferi (the causative agent of lyme disease) are expanding in the usa. to assess the role of migratory songbirds in the spread of this tick and pathogen, we captured passerines in central illinois during the fall of 2012. we compared forested sites in regions where i. scapularis populations were either previously or not yet established. ticks were removed from birds and blood samples were taken ...201525297819
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
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
role of the eastern chipmunk (tamias striatus) in the epizootiology of lyme borreliosis in northwestern illinois, usa.the role of the eastern chipmunk (tamias striatus) in the epizootiology of lyme borreliosis was evaluated in castle rock state park, illinois (usa), an enzootic region, from june to august 1993. prevalence, intensity, and molting rate of immature ixodes scapularis were determined for chipmunks, white footed mice (peromyscus leucopus), and raccoons (procyon lotor). chipmunks were the primary host for i. scapularis nymphs and an important secondary host for i. scapularis larvae. based upon ear pun ...19979027689
ixodes scapularis and borrelia burgdorferi among diverse habitats within a natural area in east-central illinois.abstract the distributions of the tick vector, ixodes scapularis, and of the etiologic agent of lyme disease, borrelia burgdorferi (bb), have continued expanding in illinois over the past 20 years, but the extent of their spread is not well known. the role of multiple habitats in the establishment and maintenance of i. scapularis and bb at local scales is not well understood, and the use of integrated approaches to evaluate local scale dynamics is rare. we evaluated habitat diversity and tempora ...201121688974
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