| epidemiologic and clinical characteristics of persons with serologic evidence of e. canis infection. | the results of a serosurvey of oklahomans for the presence of antibody to ehrlichia canis is reported. paired serum specimens, from patients lacking the serologic criteria for diagnosis of rocky mountain spotted fever (rmsf), were tested. a four-fold increase in e. canis-ifa antibody was found in 16/144 (11 percent) of these paired serum samples. patients with serologic evidence of e. canis infection had a mean age of 34 years, 69 percent were male, and 63 percent lived in a town less than 10,00 ... | 1990 | 2316766 |
| 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 ... | 1989 | 2518693 |
| the first isolation, in vitro propagation, and genetic characterization of ehrlichia canis in israel. | ehrlichia canis, the etiologic agent of canine ehrlichiosis, was isolated in israel from a naturally infected dog with acute signs of the disease. the organism designated e. canis 611, was passaged experimentally to a beagle, from which it was propagated in primary canine monocytes. the organism was then grown in vitro in a continuous canine cell line, dh82. nine beagles subsequently injected with whole e. canis-infected blood all developed typical symptoms of ehrlichiosis. an indirect immunoflu ... | 1996 | 8686178 |
| a molecular and serologic survey of ehrlichia canis, e. chaffeensis, and e. ewingii in dogs and ticks from oklahoma. | polymerase chain reaction and southern hybridization were used to survey for the presence of ehrlichia canis, ehrlichia chaffeensis, and ehrlichia ewingii in blood samples of 65 dogs that harbored ticks from northcentral and northeastern oklahoma. dog blood samples were also examined for antibodies against e. canis and e. chaffeensis, using an immunofluorescent antibody test. ten of 65 dogs (15.4%) examined were positive for ehrlichia spp. by pcr. four (6.2%) were positive for e. ewingii, 2 (3.1 ... | 1998 | 9831955 |
| 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 ... | 2010 | 20541322 |
| focus of human parasitism by the brown dog tick, rhipicephalus sanguineus (acari: ixodidae). | throughout most of its range, the brown dog tick, rhipicephalus sanguineus (latreille), prefers dogs as a host, but human bites occasionally occur in the mediterranean region and central america; historically, this species has rarely bitten humans in the united states. a focus of 15 human bite cases by this tick is reported from four air force bases located within 200 miles of each other in north central texas and southwestern oklahoma. the sudden appearance of numerous documented bite cases ind ... | 1989 | 2585458 |
| epidemiologic, clinical, and laboratory findings of human ehrlichiosis in the united states, 1988. | in 1988, the centers for disease control and the oklahoma state department of health identified 40 patients who had a fourfold or greater change in antibody titer in response to ehrlichia canis. the median age of these patients was 42 years, 83% were male, 76% became ill between may and july, and 92% reported recent exposures to ticks. patients resided in or were exposed to ticks in 14 states, including five where ehrlichiosis had not been reported before 1988. thirty-four patients (85%) were ho ... | 1990 | 2214103 |
| 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 ... | 2013 | 23778619 |
| 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 ... | 2011 | 21790699 |