| the susceptibility of muskrats and snowshoe hares to experimental infection with a chlamydial agent. | muskrats (ondatra zibethicus) and snowshoe hares (lepus americanus) were exposed experimentally by various routes to a chlamydial agent (designated strain m56) originally isolated during a die-off of muskrats and snowshoe hares which occurred in saskatchewan during 1961. both species were susceptible to experimental infection. whereas m56 was highly lethal for snowshoe hares (18 deaths/19 exposed), it was less virulent for muskrats (6 deaths/20 exposed). the degree of susceptibility of muskrats ... | 1970 | 4246008 |
| western equine encephalitis virus in saskatchewan garter snakes and leopard frogs. | western equine encephalitis virus was isolated from two naturally infected snakes on first bleeding and from seven others at subsequent bleedings, both with and without preliminary chilling. one snake, with neither detectable virus nor serum neutralizing antibodies when first bled, developed viremia later. viremia in garter snakes has a cyclic rhythm independent of the temperature of the environment. virus was isolated from 6 frogs, and 50 out of 179 had detectable serum neutralizing antibodies. ... | 1966 | 5919753 |
| tularaemia transmitted by ticks (dermacentor andersoni) in saskatchewan. | common wood ticks (dermacentor andersoni) collected from saskatchewan landing provincial park, saskatchewan in the spring of 1982 transmitted a lethal tularaemia infection to four of six rabbits. francisella tularensis organisms were isolated from tissues taken from the dead rabbits and identified from subcultures using an indirect immunofluorescent antibody assay. one human associated with the animals developed symptoms of tularaemia and, after successful therapy, had a significant increase in ... | 1983 | 6667429 |
| tularemia in canada with a focus on saskatchewan. | although rare among humans in canada, tularemia is often endemic in wildlife. the inhabitants of rural areas are especially likely to be exposed to the causative bacterium, francisella tularensis, through trapping or through the bites of arthropods. muskrats have replaced rabbits as the principal source of infection, as illustrated by a familial outbreak of oropharyngeal tularemia in saskatchewan. in humans the disease has six distinct forms and can be asymptomatic, but it generally comes to med ... | 1982 | 7046896 |
| isolation of circovirus from lesions of pigs with postweaning multisystemic wasting syndrome. | postweaning multisystemic wasting syndrome (pmws), an apparently new disease, has been recognized in swine herds in western canada. young pigs with this disease have progressive weight loss, tachypnea, dyspnea, and jaundice, accompanied by interstitial pneumonia, lymphadenopathy, hepatitis, and nephritis. we examined more than 400 pigs from more than 70 herds in alberta, saskatchewan, and manitoba with cases of pmws. a small virus was isolated from a range of tissues from 8 of 8 affected pigs ex ... | 1998 | 9442952 |
| malignant mesenchymal tumors in two white-tailed jack rabbits (lepus townsendii). | two white-tailed jack rabbits (lepus townsendii) with proliferative lesions in their internal organs were submitted to the canadian cooperative wildlife health centre (saskatoon, saskatchewan, canada) for necropsy because of concern that dogs that had contact with the hares might have been exposed to an infectious disease. in both hares, the primary diagnosis was neoplasia. one hare had metastatic leiomyosarcoma and uterine fibroma, the other had metastatic mesenchymal tumors involving the liver ... | 2004 | 15650095 |
| bioassays with caged hyalella azteca to determine in situ toxicity downstream of two saskatchewan, canada, uranium operations. | the main objectives of this in situ study were to evaluate the usefulness of an in situ bioassay to determine if downstream water bodies at the key lake and rabbit lake uranium operations (saskatchewan, canada) were toxic to hyalella azteca and, if toxicity was observed, to differentiate between the contribution of surface water and sediment contamination to in situ toxicity. these objectives were achieved by performing 4-d in situ bioassays with laboratory-reared h. azteca confined in specially ... | 2007 | 17941726 |
| effect of sampling method on contaminant measurement in pore-water and surface water at two uranium operations: can method affect conclusions? | this paper describes a comparison of two methods of sediment pore-water sampling and two methods of surface water sampling that were used in a broader investigation of cause(s) of adverse effects on benthic invertebrate communities at two saskatchewan uranium operations (key lake and rabbit lake). variables measured and compared included ph, ammonia, doc, and trace metals. the two types of sediment pore-water samples that were compared are centrifuged and 0.45-microm filtered sediment core sampl ... | 2009 | 18726245 |
| microbial distribution and diversity in saturated, high ph, uranium mine tailings, saskatchewan, canada. | microbiological analyses were conducted on core samples collected along a vertical profile (0-66 m below surface) from the tailings management facility (tmf) at the rabbit lake uranium mine in northern saskatchewan, canada. bacterial numbers in the core materials were similar to surrounding soils and surface waters, regardless of the seemingly unfavorable ph (mean=9.9) and temperature (approximately 0 degrees c) in the tmf. the greatest number of viable cells (105 cfu/g) was detected at the inte ... | 2008 | 18997849 |
| tularemia, plague, yersiniosis, and tyzzer's disease in wild rodents and lagomorphs in canada: a review. | information related to infection of wild rodents or lagomorphs in canada by francisella tularensis, yersinia pestis, other yersinia spp., and clostridium piliforme was searched for this study. reports on tularemia in humans linked to these species came from diagnostic databases, literature, wildlife health specialists, and public health agencies. tularemia has been diagnosed in 8 species of wild rodent and 2 species in the genus lepus in canada. tularemia occurred in wild animals, or in humans a ... | 2009 | 20190973 |
| Widespread dispersal of Borrelia burgdorferi-infected ticks collected from songbirds across Canada. | Abstract Millions of Lyme disease vector ticks are dispersed annually by songbirds across Canada, but often overlooked as the source of infection. For clarity on vector distribution, we sampled 481 ticks (12 species and 3 undetermined ticks) from 211 songbirds (42 species/subspecies) nationwide. Using PCR, 52 (29.5%) of 176 Ixodes ticks tested were positive for the Lyme disease spirochete, Borrelia burgdorferi s.l. Immature blacklegged ticks, Ixodes scapularis, collected from infested songbird ... | 2011 | 21864130 |
| septicemic listeriosis in wild hares from saskatchewan, canada. | the bacterium listeria monocytogenes causes disease in a wide variety of mammals including rabbits and hares. we describe naturally acquired metritis and septicemic listeriosis in wild female hares from saskatchewan, canada. between april 2012 and july 2013, two white-tailed jackrabbits (lepus townsendii) and a snowshoe hare (lepus americanus) were presented to the veterinary medical centre at the western college of veterinary medicine, saskatoon, saskatchewan, canada with nonspecific neurologic ... | 2015 | 25647601 |