| the systematics of nematodes that cause ostertagiasis in domestic and wild ruminants in north america: an update and a key to species. | studies of medium stomach worms (subfamily ostertagiinae) of domestic and wild ruminants in north america have refined our understanding of the systematics, host distribution and biogeography of these nematodes. strong support for recognition of monophyly for the ostertagiinae has resulted from preliminary phylogenetic analyses of morphological characters among these and other trichostrongylids. evaluation of morphological and biochemical characters in our laboratory and elsewhere has not refute ... | 1993 | 8484224 |
| pattern of abomasal helminths in fallow deer farming in umbria (central italy). | five helminth species were seen in the abomasa of 29 farmed fallow deer. spiculopteragia asymmetrica was most common in both prevalence (96.6%) and abundance (166.2). ostertagia drozdzi, ostertagia arctica and spiculopteragia quadrispiculata were also recovered with high prevalence (79.3-93.1%); trichostrongylus axei was sporadic (3.4%). yearlings had worm counts of 496-1480, adult males of 168-1720 and females of 18-2008. for nine of 13 deer, the faecal egg counts were negative and post-mortem ... | 1993 | 8493770 |
| dna evidence that ostertagia gruehneri and ostertagia arctica (nematoda: ostertagiinae) in reindeer from norway and svalbard are conspecific. | dna sequences of its-1 and its-2 of rdna were determined for 16 individual adult males each of ostertagia gruehneri and ostertagia arctica from svalbard reindeer (rangifer tarandus platyrhynchus) and eurasian tundra reindeer (r. t. tarandus). each its was virtually identical in o. gruehneri and o. arctica and the three mixed bases detected were shared by both species. our results strongly suggest that o. gruehneri and o. arctica are dimorphic males of the same species. | 2000 | 10779581 |
| identification by polymerase chain reaction (pcr) of marshallagia marshalli and ostertagia gruehneri from svalbard reindeer. | a polymerase chain reaction (pcr) assay to identify two common abomasal nematodes marshallagia marshalli and ostertagia gruehneri of svalbard reindeer was developed. species-specific pcr primers were designed from internal transcribed spacer (its)-2 sequences of rdna and validated using morphologically identified adult male and female nematodes. using the species-specific primers, a 110 bp fragment was amplified from m. marshalli and its minor morph marshallagia occidentalis and a 149 bp fragmen ... | 2000 | 10899533 |
| [ostertagia arctica (mitzkewitsch, 1929) found in cattle and goats in sardegna]. | | 1956 | 13446143 |
| the reindeer abomasal nematode (ostertagia gruehneri) is naturally transmitted to sheep when sharing pastures. | the increasing number of sheep (ovis aries) in northern finland, often alternately corralled with winter-fed reindeer (rangifer tarandus tarandus), creates potential for cross-infection of gastrointestinal nematodes. the aim of this study was to elucidate this possibility with 43 animals. eleven reindeer and 8 sheep had shared a corral by turns, reindeer during winters, and sheep in summers. another 12 reindeer had no known contact with sheep. twelve sheep had no close contact to other ruminants ... | 2014 | 25106839 |