| interbreeding in the subfamily ostertagiinae (nematoda: trichostrongylidae) of ruminants. | the interbreeding of 6 species of ostertagiines was studied in a sheep model. virgin young females of selected nonpolymorphic strains of ostertagia ostertagi, ostertagia leptospicularis, and teladorsagia circumcincta were mated with various male ostertagiines. interbreeding was successful between o. ostertagi and ostertagia lyrata, o. leptospicularis and ostertagia kolchida, and t. circumcincta and teladorsagia trifurcata, respectively. their offspring were fertile and resembled one parent or th ... | 1992 | 1597780 |
| use of random amplified polymorphic dna for identification of ruminant trichostrongylid nematodes. | the aim of this work was to evaluate random amplified polymorphic dna (rapd) as a source of markers for species identification and phylogenetic analysis of ruminant trichostrongylid nematodes. as these nematodes are often polymorphic, species identification may be difficult. we tested eight species and several of their morphs: haemonchus contortus (three vulvar morphotypes: flap, smooth, and knobbed), teladorsagia circumcincta, ashworthius gagarini, spiculopteragia boehmi, ostertagia leptospicul ... | 1995 | 7724508 |
| species and morphs in the ostertagiinae: an allozyme study of seven species. | five enzymes, malate dehydrogenase, lactate dehydrogenase, mannose-phosphate isomerase, glucose-phosphate isomerase and phosphoglucomutase from seven putative species of ostertagiinae were compared using starch-gel electrophoresis. the nei distances were not much affected by origin of specimens or host species. six of the putative species could form polymorphic pairs: ostertagia ostertagi and ostertagia lyrata, ostertagia leptospicularis and ostertagia kolchida, teladorsagia circumcincta and tel ... | 1993 | 8300286 |
| 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 |
| [the occurrence of intestinal parasites of roe deer and red deer in the western pomerania voivodeship]. | the aim of the study was to establish the parasite prevalence of roe deer and red deer in western pomerania. | 2005 | 16913504 |
| age distribution and seasonal dynamics of abomasal helminths in wild red deer from central spain. | a study on age distribution and seasonal dynamics of abomasal helminths in wild red deer was conducted in central spain, by monthly samplings of fawns (<1 yr), subadult (1-2 yr), and adult (>2 yr) animals. both intensity and prevalence of abomasal parasitism were higher in older animals, particularly in males. a bimodal pattern for intensity of infection by gastrointestinal parasites was observed. maximum values attained in winter and summer may be related to variation in climate and the shiftin ... | 2008 | 18576697 |
| gastrointestinal nematode infections in roe deer (capreolus capreolus) from the nw of the iberian peninsula: assessment of some risk factors. | intestinal contents of 218 roe deer hunted in the northwest (nw) of the iberian peninsula during the 2008-2009 hunting seasons were examined in order to provide information on the gastrointestinal (gi) nematode prevalence and intensity of infection and the possible influence of some environmental and intrinsic factors such as climatic conditions, age and sex. all the animals studied harboured gi nematodes, and a total of 20 different species belonging to ten genera were identified. spiculopterag ... | 2013 | 23433640 |