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[distribution of nematode parasites of the digestive system in sheep (ovis aries) and goats (capra hircus) of the piedmontese and valdostano alpine arc].a survey, carried out on gastro-intestinal nematodes of sheep and goats of piemonte and of valle d'aosta (87 sheep and 12 goats) has shown the presence of the following species in sheep, bunostomum trigonocephalum, chabertia ovina, cooperia curticei, haemonchus contortus, marshallagia marshalli, nematodirus abnormalis, nematodirus filicollis, nematodirus helvetianus, nematodirus spathiger, oesophagostomum venulosum, ostertagia circumcincta, ostertagia lyrata, ostertagia trifurcata, skrjabinema o ...1977572958
studies on nematode infections of beef cattle in new south wales.the occurrence and seasonal trends of nematode parasite infections in beef cattle on the tablelands and north coast regions of new south wales are described, based on worm counts from 627 spring-born steers slaughtered at 2-monthly intervals from 6 to 24 months of age. the predominant parasites were ostertagia ostertagi, trichostrongylus axei and cooperia spp. large burdens of adult ostertagia were seen in 12-month-old animals in late winter and early spring, and later in 18- to 20-month-old cat ...1977614021
[effect of fenbendazole (panacur) in sheep naturally invaded by gastrointestinal and lung nemtaodes].the paper presents the results of the clinical tests of fenbendazole (panacur, produced by hoechst, f. r. g.), a new antihelminthic preparation. the tests were performed in sheep naturally invaded by gastrointestinal and lung nematodes. helminthological dissection performed 7 days after the application of 5 mg of fenbendazole per 1 kg of sheep weight proved 100% effectiveness on lungworms (dictyocaulus filaria) and on the following gastrointestinal helminths: ostertagia ostertagi, haemonchus con ...1975812246
intestinal nematodes of white-tailed deer in southeastern united states.the small intestine, large intestine, and cecum of 975 white-tailed deer (odocoileus virginianus) from 83 localities in 13 southeastern states were examined for nematodes. in order of prevalence, the following parasites were found: capillaria bovis, eucyathostomum webbi, monodontus louisianensis, nematodirus odocoilei, oesophagostomum venulosum, trichuris sp, cooperia punctata, trichostrongylus longispicularis, strongyloides sp, cooperia oncophora, cooperia spatulata, cooperia sp, and trichostro ...1976977456
the anthelmintic efficacy of fenbendazole against a mixed nematode infection in sheep.fenbendazole (methyl-5-(phenylthio)-2-benzimidazole carbamate) at dose rates of 5 mg/kg and above was 100 per cent effective in eliminating a naturally acquired dictyocaulus filaria infection in sheep. the drug was 100 per cent effective in eliminating concurrent infections of adult trichostrongylus axei, haemonchus contortus, haemonchus placei, ostertagia circumcincta, ostertagia ostertagii, cooperia oncophora, cooperia mcmasterii, nematodirus spathiger, neumatodirus filcollis, oesophagostomum ...19751153893
effect of genetic type, lactation and management on helminth infection of ewes in an intensive grazing system on irrigated pasture.a survey of helminth infection was conducted in a flock of 290 ewes distributed into romanov (r), merinos d'arles (m) and romanov x merinos (r x m) genetic types, grazing irrigated pasture in the south of france. faecal egg and larval counts were done seven times per year from 1981 to 1984 on homogeneous groups of ewes and then individually once to four times every autumn from 1985 to 1988. helminth fauna was diverse and more abundant during autumn. high levels of strongyle infection occurred in ...19921459785
spiculopteragia spiculoptera, s. asymmetrica and ostertagia leptospicularis from cervus elaphus in la pampa, argentina.the nematode species spiculopteragia spiculoptera, spiculopteragia asymmetrica and ostertagia leptospicularis were recovered from the abomasum of wild red deer, cervus elaphus, in the forest area of the semi-arid pampeana region of la pampa (argentina) for the first time. oesophagostomum venulosum and dictyocaulus spp. were also found.19911763487
glucose 6-phosphate dehydrogenase: isoenzymatic pattern in oesophagostomum venulosum, trichuris ovis and t. suis.in the present communication we have studied the isoenzymatic pattern activity of the glucose 6-phosphate dehydrogenase (g6pd) in oesophagostomum venulosum, trichuris ovis and t. suis, parasites of capra hircus (goat), ovis aries (sheep) and sus scrofa domestica (pig) respectively, by polyacrylamide gel electrophoresis. different phenotypes have been observed in the g6pd isoenzymatic pattern activity in males and females of oesophagostomum venulosum. furthermore, g6pd activity has been assayed i ...19911795090
fecundity of gastrointestinal trichostrongylid nematodes of sheep in the field.twenty-two dorset rambouillet lambs were moved to contaminated pasture on apr 1, 1987. at regular intervals thereafter, pairs of lambs were withdrawn and euthanatized. gastrointestinal parasites in the abomasum, small intestine, cecum, and large intestine were removed and counted. the last pair of lambs was euthanatized 8 months after original placement on the contaminated pasture. fecal samples were taken at 3- to 4-week intervals throughout the grazing season and the fecal egg counts were used ...19911892277
periparturient rise in faecal nematode egg counts in west african dwarf sheep in southern ghana in the absence of arrested strongyle larvae.the nematode egg output of two groups of ewes, a pregnant test group (2-3 years of age) mated between march and april and a non-pregnant control group (5-6 years of age) was followed. the worm burdens acquired by worm-free 'tracer' lambs were also followed on the same pasture from march 1988 to february 1989. there was a significant difference (p less than 0.05) in the magnitude of the egg output in the test group compared with the control group. in the test ewes, an initial rise in egg producti ...19911897121
overberg research projects. i. the epidemiology of parasitic nematodes in ewes, suckling lambs and weaners.total differential warm counts were done on sheep slaughtered from 7 may 1987 to 19 may 1988 at boontjieskraal estate in the overberg, republic of south africa. it was found that winter lambs became infested with nematodirus spathiger at 5 to 7 weeks of age. at weaning in october 1987 this species was superseded by teladorsagia circumcincta and trichostrongylus rugatus. small numbers of trichuris skrjabini and oesophagostomum venulosum were also present. from july to october, 3rd and 4th stage l ...19892487725
availability of infective larvae of parasitic nematodes of sheep grazing on kikuyu (pennisetum clandestinum) pastures in the winter rainfall area.thirteen groups of 4 south african mutton merinos grazed for 4 weeks with the flock on kikuyu pastures and were slaughtered for total and differential worm counts at necropsy. subsequently 12 groups of 8 week tracers grazed on the pastures and were killed for worm counts post mortem. the following were present in most sheep: teladorsagia (syn. ostertagia) circumcincta, trichostrongylus axei, trichostrongylus colubriformis, dictyocaulus filaria and oesophagostomum venulosum. haemonchus contortus, ...19892626260
efficacy of febantel against naturally acquired gastrointestinal nematodes in calves, and recognition of oesophagostomum venulosum in oregon cattle.the efficacy of febantel (5.0 mg/kg) against naturally acquired infections of gastrointestinal nematodes was evaluated in a controlled test in calves during the winter. twenty steers were allotted to either control or treatment groups of 10 animals each. seven days after treatment, calves were euthanatized and necropsied for recovery of parasites. febantel was highly effective against adults of ostertagia spp (88.6% efficacy based on median), cooperia spp (97.7%), trichostrongylus spp (98.2%), o ...19883223663
seasonal prevalence of gastrointestinal nematodes of beef calves grazed on irrigated pastures in the lower sacramento valley of california.two worm-free calves were allowed to graze on irrigated pasture with a naturally infected herd for each of 34 one-month periods from november 1979 to august 1982. after each grazing period, the calves were transferred to a cement-floored pen for 3 weeks and then were euthanatized and necropsied. ostertagia ostertagi and cooperia oncophora were the most prevalent species of nematodes recovered. adults and larvae of ostertagia spp and cooperia spp were most numerous in winter and spring and least ...19883377319
the anthelmintic efficacy of netobimin against naturally acquired gastrointestinal nematodes in sheep.the broad-spectrum anthelmintic efficacy of netobimin (sch 32481, schering corporation) was evaluated using 30 cross-bred spring lambs with naturally acquired infections of gastrointestinal nematodes. three groups of 10 animals each were allotted into either control (given a tap water drench as a placebo) or 7.5 and 20 mg kg-1 dosage groups (given the netobimin as an oral drench). seven to fourteen days post-treatment, animals were necropsied and nematodes recovered by standard techniques. exami ...19873439008
parasites in sheep grazing on kikuyu (pennisetum clandestinum) pastures in the winter rainfall region.regular worm counts were done post-mortem on sheep that had grazed on kikuyu pastures at the elsenburg research station near stellenbosch, a winter rainfall region. major species were trichostrongylus colubriformis, trichostrongylus axei, while ostertagia circumcincta was usually present in large numbers. minor species were haemonchus contortus, nematodirus spathiger, dictyocaulus filaria, oesophagostomum venulosum, trichuris spp., chabertia ovina and larvae of the arthropod oestrus ovis. muelle ...19873587925
seasonal occurrence of infective nematode larvae in california sierra foothill pastures grazed by cattle.worm-free holstein tracer calves were used to assess the seasonal variation in number and course of development of nematode parasites of cattle on an irrigated pasture located in the california sierra foothills. the most common genera of nematodes found in the abomasum and small intestine were ostertagia and cooperia, respectively. the infective ostertagia larvae on herbage were most numerous in early spring and lowest in summer months. arrested development of ostertagia occurred in mid-to-late ...19863752675
effects of season and physical condition on the gastrointestinal helminth community of white-tailed deer from the texas edwards plateau.eighty-six adult female white-tailed deer, odocoileus virginianus (zimmermann), collected over a 12-mo period in the texas edwards plateau, harbored six species of nematodes (haemonchus contortus, gongylonema pulchrum, oesophagostomum venulosum, ostertagia ostertagi, cooperia sp., and apteragia odocoilei), and two cestodes (moniezia sp. and taenia hydatigena). the patterns of distribution of the three common species of gastrointestinal helminths (h. contortus, o. venulosum, and g. pulchrum) were ...19854032624
[pathogenic role of o. venulosum in lambs].studied was the effect of an experimental infection of lambs with 1000 and 4000 larvae of oesophagostomum venulosum on the activity of some more important serum enzymes, the level of sulfhydryl groups, and the level of sugar. it was found that the activity of glutamic acid oxal-acetate transaminase and lactic acid dehydrogenase rose, and that of alkaline phosphatase dropped. at 4000 larvae the level of glutamic acid pyruvate transaminase rose. the concentration of blood sugar dropped. there was ...19854035993
[immunological studies on sheep affected by chabertia ovina and oesophagostomum venulosum]. 19684976087
studies on some aspects of oesophagostomum venulosum (nematoda). 19655830413
[first sign in italy of nematodirus roscidus, apteragia quadrispiculata and ostertagia drozdzi, found in dama dama].the authors refer the first report in italy of nematodirus roscidus railliet, 1911, apteragia quadrispiculata jansen, 1958 and ostertagia drozdzi jancev, 1977 from dama dama. in fallow deer they found also: trichostrongylus axei, trichostrongylus colubriformis, trichostrongylus vitrinus, spiculopteragia asymmetrica, skrjabinagia arctica, oesophagostomum venulosum, trichuris ovis. trichostrongylus axei, trichostrongylus colubriformis, trichostrongylus vitrinus and skrjabinagia arctica were not fo ...19836543932
nematoda: aerobic respiratory pathways of adult parasitic species.aerobic respiratory pathways have been compared in adult parasitic nematodes, including trichostrongylus colubriformis, nippostrongylus brasiliensis, ostertagia ostertagi, cooperia oncophora, haemonchus contortus, oesophagostomum venulosum, chabertia ovina, dictyocaulus filaria, dictyocaulus viviparus, and ascaridia galli. respiration was measured in both whole worm or tissue homogenates and isolated mitochondrial fractions, and delineated into the mammalian type or alternative respiratory pathw ...19846692887
[changes in serum proteins and their fractions in lambs with experimental oesophagostomum venulosum infection].studied was the effect of an experimental infection with oesophagostomum venulosum on the total serum protein and the protein fractions. two test groups of lambs were used--with a weak and a strong infection, respectively. it was found that on the seventh day of infection there started a rise of the total serum protein. that was followed by a drop below the level established prior to the infection. albumins dropped, while alfa-, beta 2-, and gamma 1-globulins rose, and that led to the decrease i ...19827182992
interaction between oesophagostomum columbianum and oesophagostomum venulosum in sheep. 19817275477
[diffusion of helminth parasites of the digestive system and respiratory system in deer (cervus elaphus) of the la mandria regional park (piedmont)].a study was carried out on the diffusion of helminth parasites of liver, gastrointestinal system and bronchial system in 68 red deer (cervus elaphus) from regional park "la mandria" (piedmont, italy). the following species of nematodes were identified: trichostrongylus axei, spiculopteragia spiculoptera, rinadia mathevossiani, cooperia oncophora, cooperia pectinata, cooperia punctata, cooperia zurnabada, oesophagostomum venulosum, dictyocaulus eckerti, varestrongylus sagittatus. studies on some ...19807312394
[possibilities of contagion of gastrointestinal and lung nematode infections of fallow deer for cattle, sheep and goats raised in the same fenced area as fallow deer].cattle as well as sheep and goats may be infected with parasitic nematodes of fallow deer under natural conditions, but heavy infections do not occur. most nematode species were recorded in goats, cattle harboured the fewest number of species. the specific abomasal parasites of fallow deer (spiculopteragia asymmetrica, apteragia quadrispiculata, skrjabinagia ryjikovi, ostertagia drozdzi) were only seen in goats in greater number while both cattle and sheep were only poor susceptible. capillaria ...19947720543
farm history and breeding management influences on the intensity and specific diversity of nematode infection of dairy goats.sixteen dairy-goat farms were investigated in the centre-west of france for nematode infection. the intensity of infection was assessed by means of faecal egg counts and nematode counts at necropsy for digestive-tract nematodes and faecal larval counts for muellerius capillaris. the specific diversity and prevalence were estimated by worm counts of 28 necropsied culled goats. the history and breeding management were recorded by means of a questionnaire. specific diversity was estimated on two cu ...19947975117
[helminth burden of slaughter sheep in upper bavaria. 1: species spectrum, infestation extent and infestation intensity].the helminth fauna of 136 slaughtered sheep (99 lambs < 1 year, and 37 sheep > or = 1 year) from upper bavaria, germany, was examined. in all 2 species of trematodes, 3 species of cestodes and 24 species of nematodes were found. all the animals harboured gastrointestinal nematodes, 9 of them liver flukes, 33 moniezia spp., 19 cysticercus tenuicollis, and one sheep setaria sp. lungworms were not seen. the most prevalent species were cooperia curticei (74.3%), trichuris ovis (69.1%), ostertagia ci ...19968694743
studies on multispecific resistance of gastrointestinal nematodes to benzimidazoles on dairy-goat farms.multispecific resistance to benzimidazoles was studied in three selected farms. these farms had bred dairy goats for more than 15 years. the helminths were introduced with the goats at the establishment of the farms which afterwards remained isolated. nematode resistance could then be related to their own management practices. faecal egg count tests and egg hatch assays were performed to assess intensity of resistance. the generic (infective larvae in faecal cultures) and specific richness (adul ...19958747916
phylogenetic relationships of australian strongyloid nematodes inferred from ribosomal dna sequence data.the sequence of the second internal transcribed spacer of the ribosomal dna was determined for the following strongyloid nematodes: cylicocyclus insignis, chabertia ovina, oesophagostomum venulosum, cloacina communis, cloacina hydriformis, labiostrongylus labiostrongylus, parazoniolaimus collaris, macropostrongylus macropostrongylus, macropostrongylus yorkei, rugopharynx australis, rugopharynx rosemariae, macropostrongyloides baylisi, oesophagostomoides longispicularis and paramacropostrongylus ...19979467733
efficacy of an ivermectin controlled-release capsule against nematode and arthropod endoparasites in sheep.five controlled trials were conducted in germany or in the united kingdom, using 74 female sheep of merino or dorset horn breeds, to evaluate the efficacy of an ivermectin controlled-release capsule against naturally acquired or induced infections of gastrointestinal nematodes, lungworms and nasal bot larvae and against incoming infections with gastrointestinal and pulmonary nematodes. half of the animals were treated with one ivermectin controlled-release capsule that delivered ivermectin at th ...19989571756
demonstration of shared carbohydrate epitopes in intestinal proteins of some bovine gastrointestinal nematodes.the presence of shared carbohydrate intestinal epitopes in bovine gastrointestinal nematodes was demonstrated. proteins were extracted from the intestinal tissue of a laboratory strain of adult haemonchus placei and used to produce monoclonal antibodies (mab). analysis of this detergent extract by sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed 7-9 bands ranging from approximately 39 to 298 kda. the mabs reacted with periodate-sensitive epitopes and, in western blots, recogniz ...19989645850
systematic relationships of some members of the genera oesophagostomum and chabertia (nematoda: chabertiidae) based on ribosomal dna sequence data.the present study characterised seven species of the chabertiidae (nematoda: strongyloidea) belonging to either the subfamily oesophagostominae (oesophagostomum radiatum, oesophagostomum venulosum, oesophagostomum dentatum, oesophagostomum quadrispinulatum, oesophagostomum columbianum, oesophagostomum bifurcum) or to the subfamily chabertiinae (chabertia ovina) by their second internal transcribed spacer rdna sequence, assessed the extent of intraspecific variation and interspecific differences ...19989846616
efficacy of copper oxide needles for the control of nematode parasites in dairy goats.the spread of benzimidazole-resistant nematodes in dairy goat farms is of a great concern as probably more than 70% of the flocks are involved. as there are very few other anthelmintic options during the lactating period, we have evaluated the efficacy of copper oxide needles (con, copinox, bayer, uk) in both experimental and natural infections in goats. the curative effect of con (2-4 g) on existing worm burdens was assessed in goats experimentally infected with teladorsagia circumcincta, haemo ...200011014608
efficacy of doramectin injectable against oestrus ovis and gastrointestinal nematodes in sheep in the southwestern region of france.a study was conducted to evaluate the therapeutic efficacy of doramectin administered intramuscularly at a dose rate of 200 microg/kg to sheep harbouring naturally acquired infections of gastrointestinal nematodes and oestrus ovis in the southwestern region of france. on day 0, 24 sheep were selected on the basis of positive faecal egg counts (>100 epg) and positive assessment of o. ovis infection (including positive o. ovis antibody level and positive clinical score). the sheep were randomly al ...200111230921
helminth fauna of cervids in belorussian polesie.we report on the examination of 18 elk ( alces alces), 16 red deer (cervus elaphus)and 16 roe deer ( capreolus capreolus) from the belorussian polesie in the period 1981-1998 for helminths. a total of 18 helminth species were found including dictyocaulus eckerti, fasciola hepatica, oesophagostomum venulosum, taenia hydatigena larvae and trichuris ovis, all of which occurred in all host species. sixteen of the species found are known to infect humans, domestic animals and/or farm animals.200312474047
diagnosis of gastrointestinal nematodes infecting sheep in qalubia governorate by infective thrid stage larvae.a total of 300 faecal samples obtained from living sheep in qalubia governorate, 128 (42.66%) harboured eggs of nematodes. the gastrointestinal nematodes had been differentiated through the infective third stage larvae. details of the general and differential categories of each were given. the recovered species were trichostrongylus axei, t. colubriformis, ostertagia circumcincta, haemonchus contortus, bunostomum trigonocephalum and oesophagostomum venulosum.199912561888
effects of the nematode oesophagostomum venulosum on sheep and goats. 195214928151
morphological identification of nematode larvae of small ruminants and cattle simplified.a simplified system has been developed to facilitate identification of nematode larvae of the common nematodes of cattle, sheep and goats. firstly, in addition to the characteristics conventionally used for identification (such as the shape of the cranial extremity and numbers of intestinal cells), the lengths of the infective sheath tails of infective larvae of each genus/species are related to that of trichostrongylus spp. instead of using measurements for differentiation. for instance, if the ...200415154594
the efficacy of albendazole against some gastrointestinal nematodes in goats.on the basis of worm counts in naturally infected angora-x goats, albendazole at either 3.8 mg/kg repeated after 24 hours or as a single dose at 7.6 mg/kg, was >99% effective in removing adult ostertagia and trichostrongylus spp. small numbers of adult haemonchus contortus, cooperia sp. and chabertia ovina were present in control but not treated animals. the single dose of 7.6 mg/kg removed >99% of adult oesophagostomum venulosum whereas the repeated dose of 3.8 mg/kg removed only 96%.198816031461
multigeneric resistance to benzimidazole anthelmintics in sheep.benzimidazole resistance involving several gastrointestinal nematode genera on a single sheep farm in new zealand is reported for the first time. a controlled slaughter trial showed that at the recommended dose rate of 12.5 mg/kg, mebendazole had efficacies of 0, 60, 66, 90, 54 and 38% against haemonchus contortus, ostertagia spp., nematodirus spp., intestinal trichostrongylus spp., strongyloides spp. and oesophagostomum venulosum, respectively. the relevance of such multigeneric resistance to p ...198916031521
parasitism among white-tailed deer and domestic sheep on common range.parasitism was studied in white-tailed deer (odocoileus virginianus) and domestic sheep (ovis aries) which shared a common range in eastern west virginia. of 30 species of internal parasites, 11 were found in deer and 22 in sheep. five parasites, sarcocystis sp., cysticercus tenuicollis, oesophagostomum venulosum, cooperia punctata, and gongylonema pulchrum, occurred in both deer and sheep. an index of similarity of 17.2 suggests that the parasite faunas of these hosts are distinct, and that it ...197616498882
[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.200516913504
[gastrointestinal nematodes and their seasonal distribution in cattle raised in central afyonkarahisar, turkey].this study was conducted during the period of september 2004-august 2005 in two villages with simple raising of cattle located in the center of the afyonkarahisar province. fecal samples collected from 985 cattle and the gastrointestinal tracts of 24 cattle were inspected. strongyle types of eggs were observed in 26.39% of the fecal samples. the infection was found to be less prevalent in the spring (22%) and most prevalent in autumn (32.53%). the genus of larvae observed in fecal cultures were ...200717471413
[the endoparasites of sika deer (cervus nippon) in austria].the endoparasite fauna of 108 sika deer (42 calves <1 year, 20 approximately 1 year old animals, 46 animals >1 year) originating from the two free-living sika deer populations in austria (ostrong, 35 animals; tullner donauauen, 73 animals) was studied. the deer were shot during the hunting seasons 2003-2005. in all, at least four species of protozoa (eimeria austriaca, eimeria robusta, eimeria sordida; sarcocystis spp.), two species each of cestodes (moniezia benedeni, larval cyst of taenia hyda ...200717987366
arrested development of sheep strongyles: onset and resumption under field conditions of central europe.two tracer tests were conducted between august 2004 and march 2007 at an ecological farm in western bohemia. the first tracer test was performed for the summer-autumn grazing period (onset of arrested development), the second for spring (resumption of arrested development). in the first tracer test, the percentage of nematodes arresting development over the winter months reached 87.7% for teladorsagia circumcincta, 66.7% for haemonchus contortus, 89.9% for nematodirus filicollis, 21.6% for trich ...200818454350
dose determination studies for monepantel, an amino-acetonitrile derivative, against fourth stage gastro-intestinal nematode larvae infecting sheep.monepantel is the first compound from the recently discovered amino-acetonitrile derivative (aad) class of anthelmintics to be developed for use in sheep. three dose determination studies were conducted in australia and switzerland to identify the minimum therapeutic dose of monepantel when formulated for the oral treatment of sheep to control fourth stage (l4) gastro-intestinal nematode larvae. in each study, sheep infected with the target nematodes (selected from haemonchus contortus, teladors ...200818760536
linear distribution of nematodes in the gastrointestinal tract of tracer lambs.forty-eight tracer lambs were killed in 2004-2007. the abomasum, duodenum, small intestine (jejunum and ileum), colon and caecum were collected and processed for parasites enumeration and identification-mucosal scrapings of both abomasums and intestines were digested. out of 48 gastrointestinal tracts examined, all were found to be positive for nematode infection. seventeen species of gastrointestinal nematodes were recovered: bunostomum trigonocephalum, cooperia curticei, haemonchus contortus, ...200818766377
determination of the effective dose rate for monepantel (aad 1566) against adult gastro-intestinal nematodes in sheep.monepantel (aad 1566) is the first compound from the recently discovered amino-acetonitrile derivative (aad) class of anthelmintics to be developed for use in sheep. three dose determination studies were conducted in australia and europe to identify the therapeutic dose of monepantel, when formulated for the oral treatment of sheep, to control adult gastro-intestinal nematodes. in each study, sheep infected with various nematode species were treated with either 1.25, 2.5 or 5.0mg monepantel/kg b ...200918950633
dose confirmation studies for monepantel, an amino-acetonitrile derivative, against fourth stage gastro-intestinal nematode larvae infecting sheep.monepantel is the first compound from the recently discovered amino-acetonitrile derivative (aad) class of anthelmintics to be developed for use in sheep. nine dose confirmation studies were conducted in australia, new zealand and switzerland to confirm the minimum therapeutic oral dose of monepantel to control fourth stage (l4) gastro-intestinal nematode larvae in sheep (target species were haemonchus contortus, teladorsagia (ostertagia) circumcincta, teladorsagia trifurcata, trichostrongylus a ...200919135310
a combined microscopic-molecular method for the diagnosis of strongylid infections in sheep.we evaluated a combined microscopic-molecular approach for the diagnosis of key strongylid infections in sheep using panels of well-defined control and test samples. the method established is based on the separation of nematode eggs from faecal samples using a salt flotation procedure, the extraction and column-purification of genomic dna, followed by real-time pcr and melting-curve analysis. specific and semi-quantitative amplification from (a minimum of 0.1-2.0pg) genomic dna of haemonchus con ...200919328802
is gastrointestinal strongyle faecal egg count influenced by hour of sample collection and worm burden in goats?gastrointestinal (gi) strongyle infections remain one of the main constraints to goat production worldwide. although several indicators of gi strongyle infections have been proposed, faecal egg count (fec) techniques are the most common approaches for the estimation of prevalence and intensity of these parasites. however, fec may be subjected to a within-individual variation due to factors such as weather, season, random day-to-day variation and phase of the parasitic infection. a longitudinal s ...200919414222
evaluation and application of a molecular method to assess the composition of strongylid nematode populations in sheep with naturally acquired infections.we evaluated the performance of a pcr method for the diagnosis of naturally acquired strongylid nematode infections in sheep (n = 470; in a temperate climatic zone of south-eastern australia), using a panel of 100 'negative control' samples from sheep known not to harbour parasitic helminths. we compared the diagnostic sensitivity (98%) and specificity (100%) of this assay against a conventional faecal flotation method and also established a system to rank the contribution of particular strongyl ...201121256979
the efficacy of trichlorphon and naphthalophos against multiple anthelmintic-resistant nematodes of naturally infected sheep in argentina.an anthelmintic efficacy trial was conducted in sheep harbouring anthelmintic-resistant worms in argentina. seventy lambs were selected from a flock that had been grazed on pastures infected with trichostrongyles previously shown to be resistant to the main anthelmintic groups. lambs were allocated to comparable groups of ten animals each and treated with trichlorphon (50 mg/kg body weight (b.w.) orally); naphthalophos (50 mg/kg b.w. orally); ivermectin (0.2 mg/kg b.w. subcutaneously); fenbendaz ...201121739383
efficacy of a combined oral formulation of derquantel-abamectin against the adult and larval stages of nematodes in sheep, including anthelmintic-resistant strains.derquantel (dql), a semi-synthetic member of a novel anthelmintic class, the spiroindoles, in combination with abamectin (aba) [as the combination product startect(-«)] is a new entry for the treatment and control of parasites in sheep. the 19 studies reported herein were conducted in australia, new zealand, south africa and the united kingdom to demonstrate the efficacy of derquantel-abamectin (dql-aba) against a broad spectrum of gastrointestinal and respiratory nematodes of sheep, and to supp ...201121684691
parasites of chamois in new zealand.abstract sir, - andrews'((2)) checklist of helminth parasites of wild ruminants in new zealand recorded the presence of 10 species of gastrointestinal nematodes in chamois (rupicapra rupicapra rupicapra l.) from "central south island". in october 1978 we examined 28 freshly-shot chamois cadavers from the harper-avoca watershed in the headwaters of the rakaia river. six of the nematode species reported by andrews were found again; viz. ostertagia ostertagi, o. circumcincta, o. trifurcata, nemat ...198122133071
nematodes of the large intestine of the european bison of the białowieza national park.the present study was conducted on 31 males and females of the european bison, eliminated during the winter seasons 2007-2011 in the białowieza primeval forest, poland. the caeca of 14 free-ranging bison, aged from 3 months up to 16 years, the most favorable infection site for the large intestine nematodes, were investigated during the winter of 2007/2008. the parasitological autopsies of the large intestines of 9 free-ranging bison aged from 5 months up to 10 years as well as 9 bison kept in th ...201223094330
endoparasites of the fallow deer (dama dama) of the antheringer au in salzburg, austria.although the annual harvest of fallow deer increased markedly in austria in the past two decades, only little is known about the parasites of fallow deer in austria. to add current faunistic knowledge on the endoparasites of fallow deer in the country, viscera from six adult males and one male fawn from the game preserve antheringer au, salzburg, were examined in 2009-2010 using standard techniques, and spleen samples were screened for dna of tick-borne pathogens (polymerase chain reaction). inf ...201424535173
gastrointestinal nematode species diversity in soay sheep kept in a natural environment without active parasite control.molecular methods based on its2 sequence analysis were used to identify strongylid parasites and describe their diversity in a management intervention and anthelmintic drug treatment-free sheep flock. fourteen different nematode parasite species were identified in the flock and the results showed a greater level of nematode species diversity than is normally reported in managed farmed flocks, with the presence of parasites such as bunostomum trigonocephalum, ostertagia leptospicularis, spiculopt ...201627523929
a multiplex pcr-based method to identify strongylid parasite larvae recovered from ovine faecal cultures and/or pasture samples.a multiplex pcr-based method was developed to overcome the limitations of microscopic examination as a means of identifying individual infective larvae from the wide range of strongylid parasite species commonly encountered in sheep in mixed sheep-cattle grazing situations in new zealand. the strategy employed targets unique species-specific sequence markers in the second internal transcribed spacer (its-2) region of ribosomal dna of the nematodes and utilises individual larval lysates as reacti ...201424373513
real-time pcr/dna melting curve-based assay to identify individual strongylid larvae recovered from ovine faecal cultures.a closed-tube real-time pcr (rt pcr) method was developed to identify individual strongylid nematode larvae recovered from ovine faecal cultures. the method builds on an earlier conventional pcr assay established by our group and similarly targets species-specific sequence motifs in the its-2 region of ribosomal dna. the new procedure combines rt pcr with dna melting curve analyses to identify species-specific amplicons, thus avoiding the need to undertake gel electrophoresis. as with the earlie ...201526526096
establishment rate of sheep gastrointestinal nematodes in farmed red deer (cervus elaphus).to investigate the establishment of sheep gastrointestinal nematodes (gin) in red deer, five red deer and five sheep aged 5-6 months were challenged with a mixed burden of sheep gin at a rate of 327l3/kg bodyweight. the lsmean (se) establishment rates (%) for haemonchus contortus, teladorsagia circumcincta, cooperia curticei, trichostrongylus spp. and oesophagostomum+chabertia spp. were 18.6 (0.03), 35.5 (0.04), 30.7 (0.04), 74.9 (0.05), 19.9 (0.06), respectively in sheep and 10.5 (0.03), 1.0 (0 ...201525657087
identification of chabertiidae (nematoda, strongylida) by pcr-rflp based method: a new diagnostic tool for cross transmission investigation between domestic and wild ruminants in france.we describe a pcr-rflp-based method that allows reliable identification of four species of nematode parasites presenting similar infective third-stage larvae (l3) with a flagelliform tail and more than 16 intestinal cells, commonly observed in gastrointestinal tract of ruminants in france. molecular analysis of the second internal transcribed spacer (its2) of ribosomal dna, considered as a specific marker for strongylida, revealed four robust monophyletic clades corresponding to species chaberti ...201425194240
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 ...201323433640
establishment of a robotic, high-throughput platform for the specific diagnosis of gastrointestinal nematode infections in sheep.the accurate diagnosis of strongylid nematode infections is central to investigating their epidemiology and for parasite control. to overcome major limitations in sensitivity or specificity of traditional methods, including faecal egg count (fec) and/or larval culture (lc), we evaluated and established a semi-automated, high throughput multiplexed-tandem pcr (mt-pcr) platform for the diagnosis of gastrointestinal strongylid nematode infections in sheep, and established its diagnostic sensitivity ...201223131681
development of a modified molecular diagnostic procedure for the identification and quantification of naturally occurring strongylid larvae on pastures.a molecular procedure was developed to detect and quantify larvae of different strongylid parasite species recovered from pasture samples. two lamb flocks (l and s) grazed separate paddocks with different natural larvae challenges (one low [paddock l] and one high [paddock s] challenge) on a commercial farm in western australia. pasture samples were collected and analysed for larvae on 9 separate occasions from each paddock. pregnant merino ewes were sampled on 3 separate occasions (2 pre-partum ...201222877827
helminths of roe deer (capreolus capreolus) in the middle black sea region of turkey.fifteen roe deer were examined at necropsy from northern turkey in the period 2006-2010 for the helminth infections. totally 6470 helminth specimens were collected and identified by morphological criteria. twenty-five helminth species were identified (1 of the class trematoda, 1 of cestoda and 23 of nematoda). dicrocoelium dendriticum (prevalence 20%) was found in liver. cysticercus tenuicollis (6.6%) was found in mesentery. haemonchus contortus (53.3%), ostertagia leptospicularis (73.3%), o. le ...201222766455
gastrointestinal parasites in an isolated norwegian population of wild red deer (cervus elaphus).thirteen red deer (cervus elaphus), culled from the isolated population at the mongstad oil refinery, norway, were investigated for gastrointestinal helminths. these animals, enclosed by the refinery fence, do not have contact with other ruminants and have a high population density considering the available browsing area (1 km(2)) within the refinery site (3 km(2)). the population was estimated to be 110-130 at the time of culling.201425294401
parasite infections in red deer cervus elaphus from krakow area, southern poland.the study describes the parasitofauna of red deer cervus elaphus from kraków area (southern poland). the study was done in years 2011-2012 and included altogether 6 animals. five deer originated from the forest areas (hunted) and one came from the urban site (it died in a road accident). in addition to post-mortem examination, coproscopic analyses with sporulation were performed to define eimeria species diversity. the deer were infected with four species of nematodes: ashworthius sidemi, spicul ...201525911038
characterization of chabertia ovina by isoenzyme gel electrophoresis: comparative study with oesophagostomum venulosum.the glucose-6-phosphate dehydrogenase (g6pd, ec.1.1.1.49), glucose phosphate isomerase (gpi, ec.5.3.1.9), and malate dehydrogenase (mdh, ec.1.1.1.37) isoenzymatic patterns of chabertia ovina were determined by starch-gel electrophoresis. the g6pd and gpi isoenzymatic patterns were characterized by the existence of three phenotypes: (1) a single and slow anodic band, (2) a single and fast anodic band, and (3) a large spot matching its migration with bands 1 and 2. these three phenotypes may be ex ...199910540947
[helminth species of goats in germany].the helminth fauna of the gastrointestinal tract of 25 and the respiratory organs and the livers of 6 german goats was qualitatively and quantitatively examined. one trematode species (dicrocoelium dendriticum), 2 species of cestodes (moniezia expansa and metacestodes of taenia hydatigena) and 28 species of nematodes (24 in the gastrointestinal tract and 4 in the lungs) were recorded. two goats were infested with oestrus ovis larvae. the most prevalent species were ostertagia circumcincta and ch ...19989880938
experimental cross-infections with gastrointestinal nematodes of sheep and cattle.five parasite-free lambs and five parasite-free calves were infected experimentally with 20,000 third stage gastrointestinal nematode larvae cultured from faeces of sheep from five different farms. in the same way five lambs and five calves were infected with larvae cultured from faeces of calves from five different farms. host specificity of the nematodes was determined using the following parameters: infection rate; number, size, and stage of the worms; their distribution within the gastrointe ...19817245840
[species of oesophagostomum in sheep and goats in stara zagora district].the study of small ruminant animals in the district of stara zagora has revealed that only one species of the oesophagostomum genus could be found--oesophagostomum venulosum (rudolphi, 1809), railliet et henry, 1913. there are some morphological and metrical differences in the imaginal and larval stages between this species found in sheep and goats and the one described in the literature. it seems, therefore, that there exists great plasticity of these signs, and this should be taken into consid ...19827170775
reduced efficacy of moxidectin and abamectin in young red deer (cervus elaphus) after 20 years of moxidectin pour-on use on a new zealand deer farm.a study was undertaken on weaned 4-5 month old farmed red deer to test the efficacy of moxidectin and abamectin anthelmintics, given by three different routes of administration, compared with an untreated control. faecal samples were collected on days 0, 7 and 14 for a faecal egg count reduction test (fecrt), blood samples were collected on days 0, 0.5, 1, 2, 3, 5, 7, 10 and 14 for pharmacokinetics, and the deer were killed on days 14 or 15 for total nematode count. the control group averaged 12 ...201424144515
occurrence of oesophagostomum species in slaughtered sheep in area of hyderabad, telangana state.a study was conducted in chengicherla slaughter house of hyderabad to find the occurrence of oesophagostomum worms, 594 oesophagostomum positive intestines were examined. among these, three species of oesophagostomum worms were recovered viz., oesophagostomum columbianum, oesophagostomum venulosum and oesophagostomum asperum were identified by light microscopy as per the keys provided by soulsby (helminths, arthropods and protozoa of domesticated animals. bailliere tindall, london, 1982) and sin ...201728848283
ultrastructural studies of three species of oesophagostomum (nematoda) by scanning electron microscopy.the surface structure of three predominant intestinal helminth species of oesophagostomum i.e., oesophagostomum columbianum, oesophagostomum venulosum and oesophagostomum asperum were studied with the help of scanning electron microscopy. oesophagostomum columbianum has hook like bent structure anteriorly with well developed lateral cervical alae that are interrupted at several intervals. it has external corona radiata (ecr) and internal corona radiata (icr), ecr comprises of 21 elements and icr ...201728848286
establishment rate of cattle gastrointestinal nematodes in farmed red deer (cervus elaphus).red deer can be infected with some gastrointestinal nematodes (gin) of cattle but it is unknown to what extent. an indoor study was conducted to determine the establishment rate of cattle gin in young deer. five young calves and 5 young red deer were used. they were effectively treated with anthelmintics when housed and then infected 2 weeks later. after four weeks they were killed for total worm counts. establishment rates were assessed comparing worm counts to the infective dose which were ide ...201728807276
eprinomectin pour-on (eprinex® pour-on, merial): efficacy against gastrointestinal and pulmonary nematodes and pharmacokinetics in sheep.the anthelmintic efficacy of the 0.5% w/v topical formulation of eprinomectin (epn), eprinex® pour-on (merial) when administered at 1 mg/kg body weight was evaluated in sheep in two dose confirmation laboratory studies and one multicenter field study. in addition, the pharmacokinetics of epn when administered at that dosage to adult sheep was determined.201728558828
gastrointestinal nematodes of dairy goats, anthelmintic resistance and practices of parasite control in northern italy.gastrointestinal nematodes (gins) are one of the main constraints to ruminant production worldwide. anthelmintic resistance (ar) has been reported in goats throughout europe, yet little is known about the ar status in italy. the aims of the study were: i) determine the frequency of ar in gins in goat flocks in northern italy, italy, ii) survey goat farmers on the current practices of parasite control, iii) update the species composition of the gastrointestinal helminthofauna. thirty three flocks ...201424886141
efficacy of the amino-acetonitrile derivative, monepantel, against experimental and natural adult stage gastro-intestinal nematode infections in sheep.multiple drug resistance by nematodes, against anthelmintics has become an important economic problem in sheep farming worldwide. here we describe the efficacy of monepantel, a developmental molecule from the recently discovered anthelmintic class, the amino-acetonitrile derivatives (aads). efficacy was tested against adult stage gastro-intestinal nematodes (gins) in experimentally and naturally infected sheep at a dose of 2.5mg/kg body weight when administered as an oral solution. some of the i ...200919019553
low-level parasitic worm burdens may reduce body condition in free-ranging red deer (cervus elaphus).regulation of ungulate populations by parasites relies on establishing a density-dependent relationship between infection and vital demographic rates which may act through the effect of parasites on body condition. we examine evidence for parasite impacts in 285 red deer (cervus elaphus) harvested during 1991 and 1992 on the isle of rum. in the abomasa, prevalence of nematodes was 100% and the most abundant genus observed were ostertagia species, however, mean intensity of infection was low (les ...200616817998
kinetics of exsheathment of infective ovine and bovine strongylid larvae in vivo and in vitro.the aim of the study was to investigate the longitudinal changes of exsheathment of ovine and bovine 3rd-stage strongylid larvae in an artificial rumen (rusitec) and to compare the results with in vivo data obtained from rumen-fistulated sheep. infective larvae were incubated in nylon mesh bags in the sheep rumen or the rusitec apparatus for periods of 1, 6 and 12 h, respectively. the 12 h exsheathment rates in the rumen and the rusitec apparatus (in parentheses) were as follows: haemonchus cont ...200212166522
effects of age, sex, lactation and social dominance on faecal egg count patterns of gastrointestinal nematodes in farmed eland (taurotragus oryx).the eland is a large african antelope that can be bred in a temperate climate, under similar conditions and production systems as cattle. however, knowledge of parasites in farmed elands outside the area of their native habitat is still limited, and information concerning factors that influence these parasites is lacking. therefore, faecal samples from an entire herd of elands, including calves and adult females and males, were examined monthly over a one year period. almost 84% of the animals w ...201526277201
pharmacokinetics and anthelmintic efficacy of topical eprinomectin in goats prevented from grooming.pharmacokinetics and anthelmintic activity of topical eprinomectin in goats prevented from physical contact to others and self-grooming were studied. sixteen approximately 7 months old male castrated german white noble goats harbouring induced infections of gastrointestinal nematode parasites were included in the study. they were blocked based on pre-treatment body weight (range 22.4 to 36.4 kg) and then randomly allocated to the untreated control group or the group treated with topical 0.5% w/v ...201425106840
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