| life cycle, host utilization, and ecological fitting for invasive lancet liver fluke, dicrocoelium dendriticum, emerging in southern alberta, canada. | the expansion of parasite distributions outside of their native host and geographical ranges has occurred repeatedly over evolutionary time. contemporary examples include emerging infectious diseases (eid's), many of which pose threats to human, domestic animal, and wildlife populations. theory predicts that parasites with complex life cycles will be rare as eid's due to constraints imposed by host specialization at each life-cycle stage. in contrast to predictions of this theory, we report 2 ne ... | 2017 | 28211758 |
| epidemiological characteristics of an invading parasite: dicrocoelium dendriticum in sympatric wapiti and beef cattle in southern alberta, canada. | previous surveys of wild ungulates indicate that the liver fluke, dicrocoelium dendriticum, was rare in the cypress hills area of southeastern alberta. however, 41 of 59 wapiti (cervus elaphus) sampled during the 2003 and 2004 hunting seasons from this region were infected, with 7 hosts containing >1,000 worms. prevalence and mean intensity were similarly high in sympatric beef cattle and mule deer. worm abundance in wapiti was age related, with calves containing significantly higher numbers of ... | 2007 | 17626339 |
| 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 |
| population genetic analysis informs the invasion history of the emerging trematode dicrocoelium dendriticum into canada. | parasite distributions are constantly changing due to climate change, local and global movement of animals and humans, as well as land use and habitat change. the trematode dicrocoelium dendriticum is a relatively recent invader of canada, being first reported in eastern canada in the 1930s and western canada in the 1970s. however, historical records are scarce and its emergence is poorly understood. the establishment of this parasite in canada provides an interesting opportunity to explore the ... | 2017 | 28668324 |