| seroepidemiology of leptospirosis in minnesota wolves. | serum samples (n = 457) from wolves (canis lupus) in northern minnesota were collected from 1972 through 1986 and were tested for antibodies against leptospira interrogans using a microtiter agglutination test. twelve serovars included in the study were: australis, autumnalis, ballum, bataviae, bratislava, canicola, copenhageni, grippotyphosa, hardjo, pomona, pyrogenes, and tarassovi. fifty-two (11%) sera had antibody titers of greater than or equal to 1:50 against one or more serovars of l. int ... | 1991 | 2067045 |
| detection of parvoviruses in wolf feces by electron microscopy. | one hundred fifteen wolf (canis lupus) feces were collected between 1980 and 1984 from northeastern minnesota and were examined for canine parvovirus by negative contrast electron microscopy. of these, seven (6%) samples revealed the presence of parvovirus. some of these viruses were able to grow in cell cultures forming intranuclear inclusion bodies and giant cells. | 1988 | 2832624 |
| antibodies against canine parvovirus in wolves of minnesota: a serologic study from 1975 through 1985. | serum samples (n = 137) from 47 wild wolves (canis lupus; 21 pups and 26 adults) were evaluated from 1975 to 1985 for antibodies against canine parvovirus, using the hemagglutination inhibition (hi) test. in addition, several blood samples (n = 35) from 14 of these wolves (6 pups and 8 adults) were evaluated simultaneously for erythrocyte and leukocyte counts, and for hemoglobin and blood urea nitrogen concentrations. sixty-nine (50%) of the serum samples (35 wolves) had hi titers of greater tha ... | 1986 | 2851572 |
| canine parvovirus infection in wolves (canis lupus) from minnesota. | | 1986 | 3005665 |
| demographic effects of canine parvovirus on a free-ranging wolf population over 30 years. | we followed the course of canine parvovirus (cpv) antibody prevalence in a subpopulation of wolves (canis lupus) in northeastern minnesota from 1973, when antibodies were first detected, through 2004. annual early pup survival was reduced by 70%, and wolf population change was related to cpv antibody prevalence. in the greater minnesota population of 3,000 wolves, pup survival was reduced by 40-60%. this reduction limited the minnesota wolf population rate of increase to about 4% per year compar ... | 2008 | 18957638 |
| seroprevalence of lyme disease in gray wolves from minnesota and wisconsin. | to determine the seroprevalence of lyme disease in gray wolves (canis lupus) from various counties of minnesota and wisconsin (usa), 589 serum samples were collected from 528 wolves from 1972 to 1989. an indirect fluorescent antibody (ifa) test was used to detect the presence of antibodies against borrelia burgdorferi. titers of greater than or equal to 1:100 were considered positive. results were confirmed by testing a few selected sera by western blotting. of the 589 sera tested, 15 (3%) had i ... | 1992 | 1602567 |
| canine parvovirus effect on wolf population change and pup survival. | canine parvovirus infected wild canids more than a decade ago, but no population effect has been documented. in wild minnesota wolves (canis lupus) over a 12-yr period, the annual percent population increase and proportion of pups each were inversely related to the percentage of wolves serologically positive to the disease. although these effects did not seem to retard this large extant population, similar relationships in more isolated wolf populations might hinder recovery of this endangered a ... | 1993 | 8387611 |
| a serosurvey of diseases of free-ranging gray wolves (canis lupus) in minnesota. | we tested serum samples from 387 free-ranging wolves ( canis lupus ) from 2007 to 2013 for exposure to eight canid pathogens to establish baseline data on disease prevalence and spatial distribution in minnesota's wolf population. we found high exposure to canine adenoviruses 1 and 2 (88% adults, 45% pups), canine parvovirus (82% adults, 24% pups), and lyme disease (76% adults, 39% pups). sixty-six percent of adults and 36% of pups exhibited exposure to the protozoan parasite neospora caninum . ... | 2017 | 28192048 |
| lambdapapillomavirus 2 in a gray wolf ( canis lupus ) from minnesota with oral papillomatosis and sarcoptic mange. | oral papillomatosis was diagnosed in a gray wolf ( canis lupus ) with sarcoptic mange from minnesota, usa found dead in february 2015. intranuclear inclusion bodies were evident histologically, and papillomaviral antigens were confirmed using immunohistochemistry. sequencing of the l1 papillomavirus gene showed closest similarity to lambdapapillomavirus 2. | 2017 | 28475450 |
| prevalence of sarcocystis in wolves and white-tailed deer in northeastern minnesota. | the prevalence of sarcocystis (protozoa: sarcocystidae) in white-tailed deer (odocoileus virginianus) from northeastern minnesota was determined by histologic examination of tongue samples. seventy-nine of 100 deer were infected; infection was higher in yearlings and adults than in fawns. sporocysts of sarcocystis were found in 3% of 72 wolf (canis lupus) scats. three of four captive wolves fed muscle from a white-tailed deer naturally infected with sarcocystis shed sporocysts 12-14 days later. | 1986 | 3086576 |
| gray wolf density and its association with weights and hematology of pups from 1970 to 1988. | we examined weights and hematologic profiles of gray wolf (canis lupus) pups and the associated wolf density in the east-central superior national forest of northeastern minnesota (usa) during 1970 to 1988. we collected weight and hematologic data from 117 pups (57 females, 60 males) during 1 september to 22 november each year. the wolf density (wolves/800 km2) trend was divided into three phases: high (72 +/- 7), 1970 to 1975; medium (44 +/- 2), 1976 to 1983; and low (27 +/- 2), 1984 to 1988. w ... | 1991 | 1758028 |
| sympatric wolf and coyote populations of the western great lakes region are reproductively isolated. | interpretation of the genetic composition and taxonomic history of wolves in the western great lakes region (wglr) of the united states has long been debated and has become more important to their conservation given the recent changes in their status under the endangered species act. currently, the two competing hypotheses on wglr wolves are that they resulted from hybridization between (i) grey wolves (canis lupus) and western coyotes (c. latrans) or (ii) between grey wolves and eastern wolves ... | 2010 | 20854277 |
| wolf (canis lupus) generation time and proportion of current breeding females by age. | information is sparse about aspects of female wolf (canis lupus) breeding in the wild, including age of first reproduction, mean age of primiparity, generation time, and proportion of each age that breeds in any given year. we studied these subjects in 86 wolves (113 captures) in the superior national forest (snf), minnesota (mn), during 1972-2013 where wolves were legally protected for most of the period, and in 159 harvested wolves from throughout mn wolf range during 2012-2014. breeding statu ... | 2016 | 27258193 |
| where and how wolves (canis lupus) kill beavers (castor canadensis). | beavers (castor canadensis) can be a significant prey item for wolves (canis lupus) in boreal ecosystems due to their abundance and vulnerability on land. how wolves hunt beavers in these systems is largely unknown, however, because observing predation is challenging. we inferred how wolves hunt beavers by identifying kill sites using clusters of locations from gps-collared wolves in voyageurs national park, minnesota. we identified 22 sites where wolves from 4 different packs killed beavers. we ... | 2016 | 27992441 |
| isolation of viable neospora caninum from brains of wild gray wolves (canis lupus). | neospora caninum is a common cause of abortion in cattle worldwide. canids, including the dog and the dingo (canis familiaris), the coyote (canis latrans), and the gray wolf (canis lupus) are its definitive hosts that can excrete environmentally resistant oocysts in the environment, but also can act as intermediate hosts, harboring tissue stages of the parasite. in an attempt to isolate viable n. caninum from tissues of naturally infected wolves, brain and heart tissue from 109 wolves from minne ... | 2014 | 24522164 |
| isolation and rflp genotyping of toxoplasma gondii from the gray wolf (canis lupus). | little is known of the genetic diversity of toxoplasma gondii circulating in wildlife. in the present study feral gray wolves (canis lupus) from minnesota were examined for t. gondii infection. antibodies to t. gondii were detected in 130 (52.4%) of 248 wolves tested by the modified agglutination test (cut-off titer of 25). tissues (hearts, brains or both) of 109 wolves were bioassayed in mice for protozoal isolation. viable t. gondii was isolated from 25 and the isolates were further propagated ... | 2013 | 23786787 |