| emergence of third-stage larvae of umingmakstrongylus pallikuukensis from three gastropod intermediate host species. | we investigated the emergence of third-stage larvae (l3) of umingmakstrongylus pallikuukensis from the slugs deroceras laeve, deroceras reticulatum, and the snail catinella sp. in the laboratory and from d. laeve on the tundra. third-stage larvae emerged from 8 of 8 d. laeve and 8 of 8 d. reticulatum housed at 20 c in darkness and from 9 of 10 d. laeve and 5 of 5 catinella sp. housed at 21 c with 10-12 hr of light/day. larvae emerged from d. laeve and d. reticulatum over a wide range of infectio ... | 2000 | 10958450 |
| differentiation of dorsal-spined elaphostrongyline larvae by polymerase chain reaction amplification of its-2 of rdna. | molecular genetics was used to devise the first reliable diagnostic tool for differentiating morphologically indistinguishable dorsal-spined, first-stage larvae (l1's) and other stages of the nematode protostrongylid subfamily elaphostrongylinae. a polymerase chain reaction (pcr) assay employing specifically designed primers was developed to selectively amplify dna of the its-2 region of the ribosomal gene. amplification of the entire its-2 region differentiated between larvae of the genera elap ... | 2000 | 11085433 |
| umingmakstrongylus pallikuukensis (nematoda: protostrongylidae) in gastropods: larval morphology, morphometrics, and development rates. | morphological and morphometric aspects of larval development of umingmakstrongylus pallikuukensis in deroceras laeve and the effects of temperature on development rates in d. laeve and deroceras reticulatum were investigated in the laboratory. larval stages were best differentiated by separation of cuticular sheaths, tail structure, and viability following digestion. growth in body and esophagus width was observed during the first-stage within the intermediate host, but the major increases in bo ... | 2001 | 11426714 |
| muskox lungworm (umingmakstrongylus pallikuukensis) does not establish in experimentally exposed thinhorn sheep (ovis dalli). | muskoxen (ovibos moschlatus moschatus) on the northwestern mainland of nunavut and northwest territories, canada, are infected with the protostrongylid lungworm, umingmaksrongylus pallikuuhkensis. the geographic range of this muskox population is expanding to the south and west, and it is anticipated that these animals will eventually become sympatric with dall's sheep (ovis dalli dalli) in the mackenzie and richardson mountains. to address the concern of wildlife managers that u. pallikulkensis ... | 2004 | 15362818 |
| "emerging" parasitic infections in arctic ungulates. | important drivers for emergence of infectious disease in wildlife include changes in the environment, shrinking habitats or concentration of wildlife, and movement of people, animals, pathogens, or vectors. in this paper we present three case-studies of emerging parasitic infections and diseases in ungulates in the canadian north. first we discuss climate warming as an important driver for the emergence of disease associated with umingmakstrongylus pallikuukensis, a nematode lungworm of muskoxen ... | 2004 | 21680491 |
| contagious ecthyma, rangiferine brucellosis, and lungworm infection in a muskox ( ovibos moschatus ) from the canadian arctic, 2014. | an adult male muskox ( ovibos moschatus ), harvested on 26 august 2014 on victoria island, nunavut, in the canadian arctic, had proliferative dermatitis on the muzzle and fetlocks suggestive of contagious ecthyma or orf (parapoxvirus). histopathologic features of the lesions were consistent with this diagnosis. orf virus dna, phylogenetically similar to an isolate from a captive muskox of the minnesota zoo, us, was detected in the lesions by pcr using parapoxvirus primers. additionally, there wa ... | 2016 | 27285415 |
| morphological and morphometric differentiation of dorsal-spined first stage larvae of lungworms (nematoda: protostrongylidae) infecting muskoxen (ovibos moschatus) in the central canadian arctic. | umingmakstrongylus pallikuukensis and varestrongylus eleguneniensis are the two most common protostrongylid nematodes infecting muskoxen in the north american arctic and subarctic. first stage larvae (l1) of these lungworms have considerable morphological similarity that makes their differential diagnosis very difficult. using light microscopy, we studied in detail the l1 of these two species and identified the key differences in morphological and morphometric attributes. thirty l1 of each speci ... | 2015 | 26155463 |
| invasion, establishment, and range expansion of two parasitic nematodes in the canadian arctic. | climate warming is occurring at an unprecedented rate in the arctic and is having profound effects on host-parasite interactions, including range expansion. recently, two species of protostrongylid nematodes have emerged for the first time in muskoxen and caribou on victoria island in the western canadian arctic archipelago. umingmakstrongylus pallikuukensis, the muskox lungworm, was detected for the first time in 2008 in muskoxen at a community hunt on the southwest corner of the island and by ... | 2013 | 23828740 |
| gimme shelter--the relative sensitivity of parasitic nematodes with direct and indirect life cycles to climate change. | climate change is expected to alter the dynamics of host-parasite systems globally. one key element in developing predictive models for these impacts is the life cycle of the parasite. it is, for example, commonly assumed that parasites with an indirect life cycle would be more sensitive to changing environmental conditions than parasites with a direct life cycle due to the greater chance that at least one of their obligate host species will go extinct. here, we challenge this notion by contrast ... | 2013 | 23801641 |