Publications

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isolation of borrelia burgdorferi (spirochaetales: spirochaetaceae) from ixodes scapularis and dermacentor albipictus ticks (acari: ixodidae) in oklahoma.borrelia burgdorferi was isolated from ixodes scapularis say and dermacentor albipictus packard that were removed as partially fed adults from white-tailed deer, odocoileus virginianus zimmermann, in oklahoma. isolation in media was accomplished only after homogenates of pooled field-collected ticks were inoculated into laboratory-reared peromyscus leucopus and reisolated from the urinary bladder into bsk ii media. both isolates were confirmed by western blot analysis and reactivity with monoclo ...19921495072
isolation of borrelia burgdorferi from peromyscus leucopus in oklahoma.borrelia burgdorferi was isolated from a field-caught peromyscus leucopus from central oklahoma (usa). the strain was identified as b. burgdorferi by reaction with monoclonal antibody h5332 specific for the outer surface protein ospa of b. burgdorferi. this represents the first isolation of b. burgdorferi from a wild mouse outside of the normal range of the known vectors ixodes dammini and i. pacificus.19921602581
serological survey for lyme disease in domestic dogs and white-tailed deer from oklahoma.sera from 223 randomly selected dogs and 489 white-tailed deer (odocoileus virginianus) were tested for antibodies to borrelia burgdorferi using an indirect kinetic elisa. dog samples were obtained in 1989 whereas deer samples were obtained between 1975 and 1990. ten known negatives and two known positives from each group were run on each plate as controls. samples showing mean mod values above the mean of negatives + 3 sd were considered positive. twenty-six dog (11.7%) and 22 deer (4.5%) sampl ...19921626867
a serological survey of ehrlichia canis, ehrlichia equi, rickettsia rickettsii, and borrelia burgdorferi in dogs in oklahoma.serum samples from 259 dogs were tested for antibodies to ehrlichia canis, ehrlichia equi, rickettsia rickettsii, and borrelia burgdorferi using the indirect fluorescent antibody test. the sera were obtained from submissions to the oklahoma animal disease diagnostic laboratory during a 14-month period from june 1986 through july 1987. the rate for positive antibody titers to e. canis was 53%, to e. equi was 33%, to r. rickettsii was 38%, and to b. burgdorferi was 18%. higher percentages of sera ...19892518693
tick-borne illness increasing in oklahoma. 19968720556
lyme borreliosis in the southern united states: a review.lyme borreliosis (lyme disease) is the most often reported arthropod transmitted disease in humans in the u.s.a. although it has been reported from 43 states, cases are especially abundant in the mid-atlantic and northeastern regions. borrelia burgdorferi, the etiologic agent, is transmitted primarily by the western blacklegged tick (ixodes pacificus) in far western north america, and by the blacklegged tick (ixodes scapularis) in eastern north america. although lyme disease cases have been repo ...19968973401
ticks and tick-borne diseases in oklahoma.tick-borne diseases are common in oklahoma, especially the eastern part of the state where tick prevalence is highest. three species of hard ticks are present in oklahoma that are known vectors of human disease--the american dog tick (rocky mountain spotted fever; rmsf), the lone star tick (ehrlichiosis) and the black-legged tick (lyme disease). oklahoma consistently ranks among the top states in numbers of reported rmsf cases, and ehrlichiosis may be as prevalent as rmsf. although lyme disease ...19989828526
prevalence of antibodies to spotted fever group rickettsia spp. and ehrlichia spp. in coyotes (canis latrans) in oklahoma and texas, usa.coyotes (canis latrans) are commonly infested with ticks, including amblyomma americanum, the predominant vector of ehrlichia chaffeensis and ehrlichia ewingii; dermacentor variabilis, an important vector of rickettsia rickettsii; and amblyomma maculatum, a major vector of rickettsia parkeri, a spotted fever group (sfg) rickettsia. to determine the degree to which coyotes are infected with or exposed to tick-borne bacterial disease agents, serum samples collected from coyotes in oklahoma and tex ...201323778619
prevalence and species of ticks on horses in central oklahoma.ticks are common on horses, but there is a dearth of contemporary data on infestation prevalence, predominant species, and tick-borne disease agents important in this host. to determine the species of ticks most common on horses and the prevalence of equine exposure to and infection with tick-borne disease agents, ticks and blood samples were collected from 73 horses during may, june, and july of 2010. adult ticks were identified to species, and antibodies to ehrlichia spp., anaplasma spp., and ...201324843940
prevalence of lyme disease infection in oklahoma.even though lyme disease probably existed in oklahoma prior to 1975 when the disease was first reported in connecticut and even though ecological conditions favor a high prevalence, an unexpectedly low rate was evidenced in both a serological survey and the number of cases reported to the oklahoma state department of health. lyme disease does not appear to pose a significant public health threat in oklahoma at the present time; however, the the presence of all the necessary factors for transmiss ...19921404480
antibodies reactive to ehrlichia spp. are common in oklahoma horses.abstract tick infestations and infection with tick-borne agents are commonly recognized in horses in north america, but equine infection with true ehrlichia spp. has not been described. to determine the degree to which horses in the south-central united states are naturally exposed to and infected with tick-borne disease agents, serum samples were collected at random (n=240) or from horses with active tick infestations (n=73) and tested by immunofluorescence antibody assay (ifa) and/or enzyme-li ...201425072984
ehrlichia ewingii infection and exposure rates in dogs from the southcentral united states.we used pcr and a novel serologic assay to determine infection and exposure rates to ehrlichia ewingii in dogs from an area of northeast oklahoma and northwest arkansas where amblyomma americanum ticks are abundant. of 143 dogs assayed, 13 (9.1%) harbored e. ewingii by pcr and 64 (44.8%) had antibodies to e. ewingii detected using a peptide-based microtiter plate elisa. dogs were more likely (p=0.001) to be positive by pcr if sampled in august (30.8%) but no association was found between seropos ...201020541322
the descriptive epidemiology of lyme disease in oklahoma.lyme disease is a tick-borne illness that primarily occurs in the united states in three endemic areas: the northeast, upper midwest, and pacific coastal regions. although oklahoma is considered a non-endemic area of lyme disease, other tick-borne infections such as rocky mountain spotted fever, ehrlichiosis, and tularemia occur at endemic levels. in order to determine the extent of lyme disease in oklahoma, the oklahoma state department of health collected information on all possible cases of l ...19911744781
lyme disease now reportable in oklahoma, letter reminds mds. 19912030464
babesia canis rossi infection in a texas dog.a 5-month-old intact male boerboel dog, imported from south africa 1 week previously, was presented to a texas veterinarian for lethargy, anorexia, and labored breathing. the dog was febrile, anemic, leukopenic, thrombocytopenic, and slightly azotemic. results of the idexx snap-4dx enzyme immunoassay were negative for dirofilaria immitis antigen and antibodies against ehrlichia canis, borrelia burgdorferi, and anaplasma phagocytophilum. an edta blood sample analyzed at oklahoma state university ...201121790699
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