| survey of hepatic and pulmonary helminths of wild cervids in alberta, canada. | during the 1988 hunting season, livers and lungs from 263 mule deer (odocoileus hemionus hemionus), 198 moose (alces alces), 147 white-tailed deer (odocoileus virginianus), and 94 wapiti (cervus elaphus nelsoni) from alberta (canada) were collected for parasitological examination. most of the samples (89%) were submitted by big game hunters throughout the province. giant liver fluke (fascioloides magna) was found in 9% of 22 yearling and 29% of 65 adult wapiti; 4% of 161 adult moose; and 2% of 9 ... | 1990 | 2250321 |
| locations of moose in northwestern canada with hair loss probably caused by the winter tick, dermacentor albipictus (acari: ixodidae). | five hundred two trappers representing 389 registered traplines in northern alberta, northern british columbia, northwest territories and yukon territory (canada) responded to a questionnaire on the occurrence of hair loss and the winter tick (dermacentor albipictus) on moose (alces alces). results suggested that winter ticks may occur as far as 62 degrees n. several sightings of moose with presumed tick-induced hair loss near kluane lake, yukon territory, suggest the possibility of introduction ... | 1989 | 2761020 |
| factors affecting transmission of larval winter ticks, dermacentor albipictus (packard), to moose, alces alces l., in alberta, canada. | the larval stage of the winter tick, dermacentor albipictus, was studied under field conditions in central alberta, canada. larvae ascended vegetation in autumn, possibly in response to photoperiod. numbers found by flagging increased from early september to early october and decreased gradually to zero by december. larvae clumped on the tips of vegetation approximately 1-1.5 m off the ground, and did not exhibit a diurnal, vertical migration. activity was temperature dependent and no obvious pr ... | 1985 | 4032625 |
| sarcocystis in wild ungulates in alberta. | muscle samples from 557 wild ungulates in alberta, comprising seven species, were examined grossly and/or histologically for cysts of sarcocystis. sarcocystis was found in 100, 96, 94, 75, 75, 73, and 49% of the wapiti (cervus canadensis), moose (alces alces), bison (bison bison), mule deer (odocoileus hemionus), bighorn sheep (ovis canadensis), mountain goat (oreamnos americanus), and white-tailed deer (o. virginianus), respectively. | 1980 | 6780701 |
| population genetic structure and the effect of founder events on the genetic variability of moose, alces alces, in canada. | moose, alces alces, occur naturally throughout most of canada but successful introductions of known numbers of animals have been made to the islands of newfoundland and cape breton. five microsatellite loci were used to investigate the population genetic structure and any change in genetic variability due to founder events of moose in canada. comparisons of allele frequencies for moose from 11 regions of the country suggested that there are at least seven genetically distinct populations (p < 0. ... | 1999 | 10447871 |
| an expanding population of the giant liver fluke (fascioloides magna) in elk (cervus canadensis) and other ungulates in canada. | giant liver fluke (fascioloides magna) populations readily expand under suitable conditions. although extirpated from the eastern slopes of the canadian rocky mountains in the early 1960s, the fluke reappeared following natural spread through mountain passes from british columbia. herein, we assessed epizootiology of the fluke population two decades later. between 1984 and 1991, 534 ungulates, including 381 elk (cervus canadensis), 68 mule deer (odocoileus hemionus hemionus), 54 white-tailed dee ... | 2015 | 25647594 |
| morphological and molecular characteristics of four sarcocystis spp. in canadian moose (alces alces), including sarcocystis taeniata n. sp. | individual sarcocysts were isolated from fresh or alcohol-fixed muscle samples of two moose from alberta, canada, and examined by light (lm) and scanning electron microscopy (sem) and molecular methods, comprising polymerase chain reaction (pcr) amplification and sequencing of the complete18s rrna gene and the partial cytochrome c oxidase subunit i gene (cox1). by lm, four sarcocyst types were recognized, and the sequencing results showed that each type represented a distinct species, i.e. sarco ... | 2014 | 24535735 |
| origin of dermacentor albipictus (acari: ixodidae) on elk in the yukon, canada. | winter ticks (dermacentor albipictus) on elk (cervus elaphus canadensis) have recently increased in numbers in the yukon, canada, potentially posing risks to other indigenous host species in the region. to evaluate the regional source of winter ticks in the yukon, we sequenced one nuclear (its-2) and two mitochondrial (16srrna and coi) genes, and genotyped 14 microsatellite loci from 483 winter tick specimens collected across north america. we analyzed genetic variation across the geographic and ... | 2014 | 24779459 |
| first report of taenia arctos (cestoda: taeniidae) from grizzly (ursus arctos horribilis) and black bears (ursus americanus) in north america. | the cestode taenia arctos was found at necropsy in the small intestine of a grizzly (ursus arctos horribilis) and a black bear (ursus americanus) from kananaskis country in southwestern alberta, canada. the autolysis of the tapeworm specimens precluded detailed morphological characterization of the parasites but molecular analysis based on mitochondrial dna cytochrome c oxidase subunit 1 gene confirmed their identity as t. arctos. this is the first report of t. arctos from definitive hosts in no ... | 2014 | 24382413 |
| ultrastructure of the cyst wall and merozoites of sarcocystis from moose (alces alces) in alberta, canada. | two distinct types of cysts of sarcocystis from the musculature of moose (alces alces) were compared by electron microscopy. the fusiform type a cysts differed from the spherical type b cysts in the appearance and thickness of the primary cyst wall, organization of cyst interior, and the presence of a secondary cyst wall around type b. the respective merozoites also differed in size as well as in the number of rhoptries and diameter and arrangement of micronemes. comparison of the ultrastructure ... | 1981 | 6797140 |