| gastrointestinal nematodes of wild sheep (ovis orientalis) from iran. | a total of 250 wild sheep (ovis orientalis) from different national parks and protected regions of iran were examined for gastrointestinal nematodes at necropsy. twenty five species of nematodes were found. marshallagia marshalli, ostertagia spp; nematodirus spp; and skrjabinema ovis were the most prevalent. although all the species found are recorded from wild sheep for the first time in iran, 88% were reported previously from domestic sheep. new host and distribution records for nematodirus da ... | 1979 | 480517 |
| cryopreservation of the infective larvae of the common nematodes of ruminants. | exsheathed infective larvae (l 3) of 19 species of nematodes were tested for infectivity in either sheep or cattle after they had been frozen in 0,9% nacl solution, stored for a relatively short time in the gas phase of liquid nitrogen and subsequently thawed. in addition, 13 of these species were tested after similar storage for up to 18 months. in sheep, haemonchus contortus, ostertagia circumcincta, trichostrongylus axei, trichostrongylus colubriformis, nematodirus spathiger and oesophagostom ... | 1977 | 566412 |
| [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 ... | 1977 | 572958 |
| an evaluation of ethyl-6-ethoxybenzothiazole-2-carbamate (sch 18099) for anthelmintic activity in domestic animals. | ethyl-6-ethoxybenzothiazole-2-carbamate (sch 18099) was evaluated for efficacy against natural helminth infections in ponies, pigs, lambs and chickens. sixteen critical trials were conducted in ponies at dosages of 15 to 150 mg/kg. at 15 mg/kg, efficacy against adult and larval oxyuris equi was 100% and 91% and against small strongyles it was 98%. efficacy levels were 95% against strongylus vulgaris and s. edentatus at the 20 mg/kg dosage. in two trials at 100 mg/kg efficacy against parascaris e ... | 1977 | 864223 |
| helminth parasites of bighorn sheep in oregon. | the lungs and gastrointestinal tracts from 18 hunter-killed bighorn rams (ovis canadensis californiana) were examined in total or in part for helminth parasites during a two-year study of three separate herds in eastern oregon. prevalence was 100% with the lungworm protostrongylus stilesi. the gastrointestinal fauna from 11 rams comprised cooperia oncophora, marshallagia marshalli, nematodirus oiratianus, oesophagostomum spp., ostertagia occidentalis, o. ostertagi, skrjabinema ovis, trichostrong ... | 1977 | 864844 |
| summer-arrested development of abomasal trichostrongylids in awassi sheep in semi-arid areas of north-west syria. | inhibition in trichostrongylids was studied in awassi sheep in north-west syria, which has cold winters and hot summers. on six occasions during a 1-year period, five ewes with natural helminth infections were slaughtered after being held in pens for 3 weeks. the percentage of inhibited larvae was lowest in january (6%); it increased during the spring to 76.7% in april and to 84.6% in june and then decreased during the autumn (57.1% in september, 26.1% in december). inhibition occurred mainly du ... | 1992 | 1438151 |
| interspecific interactions in naturally acquired nematode communities from sheep abomasum in relation to age of host and season in four areas of león (spain). | the abomasa of naturally infected ewes (407) and lambs (190) from four areas of león were collected weekly over 2 years in the abattoir of león (north-west spain). the major species and morphs found were teladorsagia circumcincta and trichostrongylus axei and to a lesser extent marshallagia marshalli and teladorsagia trifurcata. the putative interactions between species were assessed by euclidian distances based on the results of multivariate analyses. the estimation of interaction was either ba ... | 1992 | 1639568 |
| cryopreservation of some common nematodes of ruminants for up to 11,3 years. | infective larvae of selected batched of the following nematode species from sheep and cattle were examined for survival and infectivity (by injection into either the abomasum, the duodenum, or the jugular vein) after having been stored in liquid nitrogen for 103-136 months: haemonchus contortus, haemonchus placei, ostertagia circumcincta, ostertagia ostertagi, marshallagia marshalli, cooperia spp., trichostrongylus axei, trichostrongylus colubriformis, trichostrongylus falculatus, nematodirus sp ... | 1990 | 2338992 |
| systematics of the nematodes that cause ostertagiasis in cattle, sheep and goats in north america. | the systematics of the ostertagiinae is unsettled with no agreement on how many genera and species are present in cattle and sheep. ten species of ostertagiinae are commonly parasitic in cattle and sheep. the males can be identified on the basis of differences in morphology of spicules and genital cones but the females of most species cannot be identified. the species-level systematics have been complicated by the proposal that the ten species are polymorphs of only five species. the systematics ... | 1988 | 3284166 |
| first report of human infection with haemonchus contortus, ostertagia ostertagi, and marshallagia marshalli (family trichostrongylidae) in iran. | | 1973 | 4760647 |
| seasonal changes in the abomasal nematodes of naturally infected ewes in moulay-bouazza (morocco). | the nematode populations of 93 abomasa of ewes from middle-atlas (morocco) were studied over a period of 3 years. the main species present were ostertagia circumcincta, marshallagia marshalli, trichostrongylus axei and t. vitrinus; less frequent species were o. ostertagi and o. trifurcata. two peaks of infection were recorded, 1 at the end of winter or the beginning of spring (february--march), and another in autumn (september). the first population peak consisted mostly of o. circumcincta and t ... | 1984 | 6541394 |
| abomasal nematodes of the svalbard reindeer (rangifer tarandus platyrhynchus vrolik). | six species of abomasal nematodes were recovered from svalbard reindeer, marshallagia marshalli and ostertagia grühneri were more prevalent than skrjabinagia lyrata, teladorsagia circumcincta, ostertagia occidentalis and ostertagia trifurcata. of 24 reindeer examined all harbored adult abomasal nematodes. there was no significant difference in intensity of infection between winter (april) and autumn (october) for either adult males or females. in winter, intensity of infection of adult males was ... | 1983 | 6887429 |
| efficacy of ivermectin against naturally acquired and experimentally induced nematode infections in sheep. | the activity of ivermectin against common nematode parasites of sheep was examined in 2 experiments. in the 1st experiment, 14 sheep with naturally acquired infections were assigned to 2 groups of 7 sheep each. sheep in 1 group were treated with 200 micrograms of ivermectin/kg of body weight and the remainder served as nontreated controls. in the 2nd experiment, 15 sheep with experimentally supplemented infections (including a benzimidazole-resistant strain of haemonchus contortus) were assigned ... | 1982 | 7041712 |
| [marshallagia marshalli in lambs from balmaceda, chile (author's transl)]. | | 1980 | 7213470 |
| survival and development of larvae of the common nematodes of ruminants after long-term cryopreservation and investigation of different routes of infestation. | exsheathed infective larvae (l3) of 16 species of nematodes were tested for infectivity in either sheep or cattle after they had been frozen and stored in 0,09% nacl solution in the gas phase of liquid nitrogen for periods of up to 59 months. a mean of greater than 90% of the l3 of haemonchus contortus, ostertagia circumcincta, trichostrongylus axei, trichostrongylus colubriformis, nematodirus spathiger, oesophagostomum columbianum and chabertia ovina of sheep and haemonchus placei, ostertagia o ... | 1980 | 7465164 |
| seasonal changes and inhibited development of the abomasal nematodes of sheep and goats in saudi arabia. | from august 1991 to july 1992, a total of 48 abomasa from sheep and 48 from goats were examined at the jeddah abattoir for the presence of adult and larval nematodes. twenty-three of the sheep (47.9%) and 21 of the goats (43.8%) were infected with nematodes, a total of eight species being found. haemonchus contortus and marshallagia marshalli appeared to be the most important parasites. other species were less prevalent: trichostrongylus axei, camelostrongylus mentulatus, parabronema skrjabini, ... | 1995 | 7676605 |
| 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 |
| parasites, biodiversity, and population dynamics in an ecosystem in the high arctic. | the abomasa of 163 svalbard reindeers (rangifer tarandus platyrhynchus) from nordenskiöld land, spitsbergen (78 degrees n, 15 degrees e) were examined for adult and juvenile nematodes. spitsbergen has midnight sun from late april to late august, arctic night from late october to mid-february, permafrost, and snow cover from october to june. plant growth is restricted to 6-8 weeks, usually starting mid-june. in the reindeer calves, which are born in june prevalence and intensity of infection incr ... | 1999 | 10456416 |
| life-history strategies and population dynamics of abomasal nematodes in svalbard reindeer (rangifer tarandus platyrhynchus). | the observation that the total abundance of adult nematodes in the abomasum of svalbard reindeer increases between october and april suggests adaptation to cope with the arctic winter. here we investigate the extent to which selection has led to similar life-history strategies in the 3 most numerous trichostrongyle species. the life-histories are found to differ markedly. we use flexible statistical models for the abundance and dispersion of parasites in the host population. one of the taxa, mar ... | 2000 | 10759088 |
| effect of seasonality on abomasal helminth community in alpine ibex (capra ibex ibex). | abomasal helminths of 81 adult female ibex (capra ibex ibex) from piz albris colony (ch) culled monthly from december 1989 to may 1991 were analyzed. subjects were divided into six quarterly groups (i: december 1989-february 1990; ii: march-may 1990; iii: june-august 1990; iv: september-november 1990; v: december 1990-february 1991; vi: march-may 1991) in order to investigate the seasonal fluctuation of helminth community parameters (abundance, richness, sex-ratio, berger-parker dominance index, ... | 1999 | 10870562 |
| 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 |
| contrasting regulation of fecundity in two abomasal nematodes of svalbard reindeer (rangifer tarandus platyrhynchus). | stability of trichostrogylid populations indicates that some form of density-dependent regulation occurs which could act through fecundity. we present evidence for intraspecific density-dependent effects in 1 of 2, dominant, abomasal nematodes species (ostertagia gruehneri) of svalbard reindeer (rangifer tarandus platyrhynchus). we found evidence in o. gruehneri, for density-dependent regulation of female worm length in april, july and october 1999. however, it is only in july that female worm l ... | 2001 | 11444620 |
| dna evidence that marshallagia marshalli ransom, 1907 and m. occidentalis ransom, 1907 (nematoda: ostertagiinae) from svalbard reindeer are conspecific. | the gastro-intestinal parasitic nematodes of ruminants marshallagia marshalli and m. occidentalis are morphs of a single species according to indirect evidence. in this study, their taxonomic status and molecular identification were assessed more directly in isolates from the abomasal nematode community of svalbard reindeer using genetic data. dna sequences of the first and second internal transcribed spacers of nuclear ribosomal rna genes were obtained from individual nematodes by the polymeras ... | 2001 | 11586078 |
| a survey of the gastrointestinal nematodes of spanish ibex (capra pyrenaica) in a high mountain habitat. | we analyzed the content of the abomasum (n = 79) and small intestine (n = 83) of spanish ibex from sierra nevada natural park, southern spain. fifteen species of trichostrongylid nematodes were identified, 4 of which were found for the first time in this host, i.e., nematodirus fillicollis, n. oiratianus, ostertagia lyrata, and o. ostertagi. teladorsagia circumcincta and marshallagia marshalli were the most abundant abomasal species, whereas n. abnormalis, n. davtiani, and n. oiratianus were dom ... | 2003 | 12760646 |
| on the synonymy of marshallagia orientalis (bhalerao, 1932) with marshallagia marshalli and a record of its occurrence from the mountainous region of the punjab. | | 1952 | 14929569 |
| helminths in a giraffe (giraffa camelopardalis xgiraffa) from a zoo in spain. | a pregnant female cape giraffe (giraffa camelopardalis giraffa) died from an unknown cause in the aitana zoo, alicante, spain. neither clinical signs nor macroscopic lesions were observed at necropsy. the alimentary tract was removed and examined for parasites. a total of 2 724 nematodes were found, including camelostrongylus mentulatus, trichostrongylus axei, ostertagia ostertagi, teladorsagia circumcincta, teladorsagia trifurcata, marshallagia marshalli, trichostrongylus vitrinus, trichostrong ... | 2004 | 15373337 |
| sex ratio variation in gastrointestinal nematodes of svalbard reindeer; density dependence and implications for estimates of species composition. | estimates of the intensity and abundance of species provide essential data for ecological, evolutionary and epidemiological studies of gastrointestinal nematode communities. these estimates are typically derived from the species composition of adult males when only males have readily scorable species-specific morphological traits. such estimation assumes that all species in the community have the same adult sex ratio. we evaluated this assumption for the trichostrongyle nematodes ostertagia grue ... | 2005 | 15700761 |
| helminths of saiga antelope in kazakhstan: implications for conservation and livestock production. | saiga antelope (saiga tatarica) graze extensively on livestock pasture, potentially enabling transmission of a wide range of parasitic helminths between saigas and domestic ruminants. thirty-six of the 38 species of helminth that have been found in saigas in kazakhstan in the past have been found also in domestic livestock. we examined 133 saigas culled for meat in autumn 1997, and found three species of cestode and 12 nematodes (nine in the abomasum), but no trematodes or lungworms. the most ab ... | 2005 | 15827221 |
| resistance to abomasal nematodes and individual genetic variability in reindeer. | resistance to parasites is believed to have a widespread influence on demographic and adaptive processes. in systems where parasites impose a fitness cost on their host, heterozygotes may be selected because they are more resistant to parasites than homozygotes. our objective was to assess the relationships between genomewide individual heterozygosity and abomasal nematode burdens in female svalbard reindeer (rangifer tarandus platyrhynchus) after the effects of host age, locality, season, and y ... | 2005 | 16262866 |
| abomasal nematodes of the red deer cervus elaphus in north-eastern italy. | the composition of the abomasal helminth fauna and parasite diversity were studied in 298 red deer collected during 1997-2000 from three different sectors (bolzano, trento and sondrio provinces) of the stelvio national park, one of the main protected areas of north-eastern italy. the association between parasite burdens and geographical areas of the hosts was assessed using the negative binomial regression. a variety of abomasal helminths, both host specific and generalist, was found in all sect ... | 2007 | 17594740 |
| epidemiology of gastrointestinal nematodes of sheep managed under traditional husbandry system in kashmir valley. | the present study was conducted with the objective to investigate the seasonal epidemiological prevalence of gastrointestinal tract (git) nematodes in different age groups, sexes and breeds (genotypes) of sheep through necropsy and faecal analysis over a period of 2 years in kashmir valley, india. a total of 1533 sheep were examined [faecal examination: 1035 (year 1: 561, year 2: 474); necropsy: 498 (year 1: 232, year 2: 266)]. out of these, 945 (61.64%) were found infected [faecal examination: ... | 2008 | 18838225 |
| [the prevalence of gastro-intestinal nematodes in hair goats of the sanliurfa region]. | the aim of this study was to determine the prevalence of gastro-intestinal nematodes in hair goats in sanliurfa region between november 2005 and november 2006. during this period, the alimentary canal from 1 or 2 goats was obtained from the municipal slaughterhouse each week. these were brought into the laboratory and examined for the presence of nematodes. gastro-intestinal tracts of 100 hair goats were examined. of these, 83 (83%) were found infected with nematodes. twenty nematode species wer ... | 2009 | 19367541 |
| gastro-intestinal nematode infections in goats relative to season, host sex and age from the kashmir valley, india. | the present study aimed to investigate the seasonal epidemiological prevalence of gastro-intestinal nematodes (gins) of goats with respect to sex and age of the host in the kashmir valley from 1 february 2005 to 31 january 2007. a total of 1267 goats were examined [faecal examination: 938 (year 1: 470; year 2: 468); gastro-intestinal (git) examination: 329 (year 1: 175; year 2: 154)]. the overall prevalence of gin infection in these animals was 54.3% (year 1: 54.8%; year 2: 53.8%; p = 0.842). th ... | 2010 | 19627625 |
| [sheep trichostrongylidosis in van province]. | this study was performed in the van municipality slaughterhouse from january to december 2001. abomasums and small intestines from a total of 104 sheep were transported to the parasitology laboratory of the veterinary faculty of yüzüncü yil university for parasitological examination. the abomasums and small intestines of the animals were opened with appropriate technique in the laboratory, and male nematodes were collected from the contents of the abomasums and small intestines using a sampling ... | 2009 | 19851969 |
| the comparative morphology of marshallagia marshalli and ostertagia occidentalis (nematoda: strongylida, trichostrongylidae) by scanning electron microscopy. | the systematics of the ostertagiinae is unsettled with no agreement on how many genera and species are present in cattle and sheep. ten species of ostertagiinae are commonly parasitic in cattle and sheep. in the global fauna, six of 13 ostertagiine genera are endemic to iran. the life cycle of ostertaginae is direct and ingested third-stage larvae after exsheatment in the rumen, penetrate the gastric glands in the abomasal mucosa where two parasitic moults occur before the l5 emerges from the gl ... | 2010 | 21193929 |
| first description of gastrointestinal nematodes of barbary sheep (ammotragus lervia): the case of camelostrongylus mentulatus as a paradigm of phylogenic and specific relationship between the parasite and its ancient host. | the gastrointestinal helminth fauna of 24 barbary sheep or aoudad (ammotragus lervia sahariensis) maintained in the parque de rescate de la fauna sahariana (prfs, csic, almeria, spain) was analyzed. most animals (87.5 %) were parasitized, and multiple infections were highly present. the following species were identified: camelostrongylus mentulatus, teladorsagia circumcincta, marshallagia marshalli, ostertagia ostertagi, o. leptospicularis, o. lyrata, haemonchus contortus, teladorsagia trifurcat ... | 2013 | 23616093 |
| climate influences assemblages of abomasal nematodes of sheep on steppe pastures in the east of algeria. | it is a common view that assemblages of parasitic nematodes are influenced by climatic conditions; however, there are only a few articles available regarding those that infect farm animals. we investigated the relationship between climate variables and infection with abomasal trichostrongyles in 335 1-year-old rams grazed on steppe pastures in eastern algeria. abomasa were collected from 12 local slaughterhouses located in four climatic areas (from humid to arid) and the worms extracted, identif ... | 2016 | 27905269 |
| comparison of internal transcribed spacers and intergenic spacer regions of five common iranian sheep bursate nematodes. | accurate identification of sheep nematodes is a critical point in epidemiological studies and monitoring of drug resistance in flocks. however, due to a close morphological similarity between the eggs and larval stages of many of these nematodes, such identification is not a trivial task. there are a number of studies showing that molecular targets in ribosomal dna (internal transcribed spacer 1, 2 and intergenic spacer) are suitable for accurate identification of sheep bursate nematodes. the ob ... | 2014 | 25678919 |
| towards finding effective indicators (diarrhoea and anaemia scores and weight gains) for the implementation of targeted selective treatment against the gastro-intestinal nematodes in lambs in a steppic environment. | the effective application of targeted selective treatment (tst) against gastro-intestinal nematodes depends on the accurate identification of those animals in need of anthelmintic treatment. finding cost and labour effective measures to identify such animals is paramount. this study tested the efficacy of three indicators on lambs in a farm in eastern algeria: anaemia score (famacha(©)), diarrhoea score (disco) and weight gain. these were contrasted against traditional parasitological infection ... | 2012 | 22270033 |
| anti-inflammatory potentials of excretory/secretory (es) and somatic products of marshallagia marshalli on allergic airway inflammation in balb/c mice. | inverse relationship between helminths infection and immune-mediated diseases has inspired researchers to investigate therapeutic potential of helminths in allergic asthma. helminth unique ability to induce immunoregulatory responses has already been documented in several experimental studies. this study was designed to investigate whether excretory/secretory (es) and somatic products of marshallagia marshalli modulate the development of ovalbumin-induced airway inflammation in a mouse model. | 2017 | 28127363 |
| response letter to "what should be taken into account during study on immunoregulatory effects of helminths: a critical analyzing on downregulation of immune responses in asthmatic patients by es products of marshallagia marshalli". | | 2017 | 28033666 |
| in vitro anthelmintic effect of tobacco (nicotiana tabacum) extract on parasitic nematode, marshallagia marshalli. | because of developing resistance to the existing anthelmintic drugs, there is a need for new anthelmintic agents. tobacco plant has alkaloid materials that have antiparasitic effect. we investigated the in vitro anthelminthic effect of aqueous and alcoholic extract of tobacco (nicotiana tabacum) against m. marshalli. for investigating this effect, we prepared three dilutions of aqueous and alcoholic extract of tobacco (25, 50 and 75 mg/ml). the worms exposed to extracts for 10 h at 25-30 °c. the ... | 2016 | 27605759 |
| the effect of marshallagia marshalli on serum gastrin concentrations in experimentally infected lambs. | : because there appeared to be no data available on serum gastrin concentrations in animals infected with marshallagia marshalli, and considering the high prevalence of this parasite in livestock throughout many countries, we decided to perform research in the field using experimental infection. after surgical implantation of abomasal cannula into 10 male baluchi sheep, each animal was orally infected with 5,000 m. marshalli larvae. serum gastrin concentrations and abomasal ph were measured wit ... | 2016 | 27166861 |
| what should be taken into account during study on immunoregulatory effects of helminths: a critical analyzing on "downregulation of immune responses in asthmatic patients by es products of marshallagia marshalli". | | 2017 | 26149204 |
| downregulation of immune responses in asthmatic humans by es products of marshallagia marshalli. | helminths and their products are considered to possess therapeutic capability to control or even prevent immune-mediated diseases. studies suggest that helminths induce a systemic immunomodulatory network, including regulatory t cells and anti-inflammatory interleukin-10 (il-10), which might play a key role in the protection against the allergic phenotype. thus, helminthic therapy is becoming of a major interest, and several researchers are enthusiastically tended to explore its role in allergic ... | 2017 | 25919312 |
| fecal egg counts for gastrointestinal nematodes are associated with a polymorphism in the mhc-drb1 gene in the iranian ghezel sheep breed. | genetic variation among sheep breeds in resistance to gastrointestinal nematodes (gin) has been demonstrated in several production environments. relationships between the ovine major histocompatibility complex and resistance to gin have been studied, but few studies have systematically examined this issue in less-developed and semi-arid regions. the aim of the current study was to explore associations between fecal worm egg counts (fec) for several gin and polymorphisms in the drb1 gene. one hun ... | 2015 | 25852746 |
| comparison of two methods of marshallagia marshalli donor sheep production. | marshallagia marshalli is found in the abomasums of sheep, goats and wild ruminants in tropical and sub tropical climates. in iran among different species of ostertagiinae that can infect sheep, m. marshalli is currently the major cause of parasitic gastroenteritis in ruminant. having a donor animal is essential for various studies. in the present study we compared the efficacy of two different method of m. marshalli donor sheep production. in the first method, m. marshalli donor sheep was produ ... | 2014 | 25035587 |
| divergent parasite faunas in adjacent populations of west greenland caribou: natural and anthropogenic influences on diversity. | gastrointestinal parasite diversity was characterised for two adjacent populations of west greenland caribou (rangifer tarandus groenlandicus) through examinations of abomasa and small intestines collected from adult and subadult females during late winter. three trichostrongyline (trichostrongylina: nematoda) species were identified from the abomasa, although none were recovered from the small intestines, with faunal composition differing between the caribou populations. in caribou from kangerl ... | 2013 | 24533335 |
| pathophysiology of marshallagia marshalli in experimentally infected lambs. | species of marshallagia are abomasal parasites in free-ranging and domesticated ungulates in temperate climatic zones throughout the world. pervasiveness of these nematodes is significant in various parts of the world. there has been limited research in the area of marshallagi amarshalli pathogenesis. the aim of this study was to investigate the effects of m. marshalli on the acid secretory capacity of the abomasal mucosa and the morphological changes due to parasitic migration to different part ... | 2013 | 24007639 |
| disease transmission in an extreme environment: nematode parasites infect reindeer during the arctic winter. | parasitic nematodes are found in almost all wild vertebrate populations but few studies have investigated these host-parasite relationships in the wild. for parasites with free-living stages, the external environment has a major influence on life-history traits, and development and survival is generally low at sub-zero temperatures. for reindeer that inhabit the high arctic archipelago of svalbard, parasite transmission is expected to occur in the summer, due to the extreme environmental conditi ... | 2012 | 22705063 |
| development and application of a delayed-release anthelmintic intra-ruminal bolus system for experimental manipulation of nematode worm burdens. | in order to quantify the impact of parasites on host population dynamics, experimental manipulations that perturb the parasite-host relationship are needed but, logistically, this is difficult for wild hosts. here, we describe the use of a delayed-release anthelmintic delivery system that can be administered when the hosts can be captured and its activity delayed until a more appropriate period in the host-parasite cycle. our model system is svalbard reindeer infected with a nematode parasite, m ... | 2012 | 22417532 |
| discovery and description of a new trichostrongyloid species (nematoda: ostertagiinae), abomasal parasites in mountain goat, oreamnos americanus, from the western cordillera of north america. | marshallagia lichtenfelsi sp. n. is a dimorphic ostertagiine nematode occurring in the abomasum of mountain goats, oreamnos americanus, from the western cordillera of north america. major and minor morphotype males and females are characterized and distinguished relative to the morphologically similar marshallagia marshalli / marshallagia occidentalis from north america and marshallagia dentispicularis, along with other congeners, from the palearctic region. the configuration of the convoluted a ... | 2012 | 22316219 |
| a brief commentary on 'response letter to "what should be taken into account during study on immunoregulatory effects of helminths: a critical analyzing on downregulation of immune responses in asthmatic patients by es products of marshallagia marshalli"'. | | 2017 | 28756633 |
| somatic extracts of marshallagia marshalli downregulate the th2 associated immune responses in ovalbumin-induced airway inflammation in balb/c mice. | recently the role of gastrointestinal nematodes in modulating the immune responses in inflammatory and immune-mediated conditions such as allergy and autoimmune diseases has been introduced. this is mainly due to the suppressive effects of somatic and excretory secretory (es) products of nematodes on the immune responses. in this study, we evaluated the immunomodulatory potentials of somatic products of marshallagia marshalli, a gastrointestinal nematodes of sheep, to suppress the immune-mediate ... | 2017 | 28494800 |