| powassan virus: vernal spread during 1965. | powassan virus was isolated from seven pools of ixodes cookei ticks removed from groundhogs (marmota monax) collected near north bay, ontario, between may and august 1965, including five pools obtained during spring. tick pools, each comprising one to nine ticks, contained 2.0 to 5.5 log(10) tcd(50) of virus upon titration in monolayer cultures of primary swine kidney cells. powassan virus neutralizing antibody prevalence in sera of the current season's groundhogs increased steadily from zero du ... | 1966 | 5904925 |
| characteristics of natural infections of the stomach worm, obeliscoides cuniculi (graybill), in lagomorphs and woodchucks in canada. | wild lagomorphs and woodchucks collected predominantly in southern ontario, canada were examined for subspecies of obeliscoides cuniculi (graybill). obeliscoides cuniculi multistriatus was found in snowshoe hares (lepus americanus). obeliscoides cuniculi cuniculi was found in cottontail rabbits (sylvilagus floridanus), european hares (lepus capensis) and woodchucks (marmota monax). prevalence of obeliscoides cuniculi multistriatus in snowshoe hares was 100% and mean intensity (and range of inten ... | 1983 | 6644920 |
| the groundhog tick ixodes cookei (acari: ixodidae): a poor potential vector of lyme borreliosis. | evidence for infection with the spirochete, borrelia burgdorferi, was sought in ixodes cookei and in groundhogs (marmota monax) in southern ontario, canada, and ticks fed on experimentally inoculated hosts were examined for the spirochete. borrelia burgdorferi was not detected by immunofluorescent examination of 110 larval, nymphal or adult i. cookei collected from the environment, or taken from humans and other animals. three groundhogs inoculated with b. burgdorferi developed titers of 1:20 to ... | 1993 | 8355343 |
| powassan virus: summer infection cycle, 1964. | between may 1, and september 15, 1964, neutralizing antibody to powassan virus was detected in sera from 163 of 464 forest mammals captured in the powassan-north bay area of northern ontario. these included 159 of 358 groundhogs and four of 43 red squirrels. acquisition of antibody by juvenile groundhogs occurred principally during july and august. powassan virus strains were isolated from tick pools containing two to 15 ixodes cookei per pool which were removed from eight of 91 groundhogs in th ... | 1964 | 14230913 |
| the prevalence of antibodies against toxoplasma gondii in some ontario mammals. | a survey of serum samples from mammals trapped in central ontario showed that many contained antibodies to toxoplasma gondii. the prevalence of infection as reflected by positive reactions in the sabin-feldman dye test appeared to be related to the type of diet of each species examined, and specifically, to the proportion of rodents in the diet. of the fox blood samples tested, 84% were positive. the percentage of positive samples diminished through, coyote, mink, bear, fisher skunk, raccoon, ma ... | 1976 | 16498870 |