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Letteratura scientifica selezionata sul tema "Teladorsagia circumcincta"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 24 luglio 2025

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Articoli di riviste sul tema "Teladorsagia circumcincta"

1

Stear, Michael, David Piedrafita, Sarah Sloan, Dalal Alenizi, Callum Cairns, and Caitlin Jenvey. "Teladorsagia circumcincta." WikiJournal of Science 2, no. 1 (2019): 4. http://dx.doi.org/10.15347/wjs/2019.004.

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2

Usai, F., R. Rinnovati, V. Trocchi, and L. Stancampiano. "Lepus corsicanus gastro-intestinal helminths: first report." Helminthologia 49, no. 2 (2012): 71–77. http://dx.doi.org/10.2478/s11687-012-0015-0.

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AbstractItalian hare Lepus corsicanus De Winton, 1898, is a true species living in simpatry with Lepus europaeus in mainland Italy and with Oryctolagus cuniculus in Sicily, where L. europaeus is absent. Up to date, nobody has studied the helminths of this endemic Italian Mammal. Therefore, in order to describe Italian hare gastro-intestinal helminths, gastro-intestinal tract of 29 Italian hares, coming from mainland Italy (#14) and from Sicily (#15) were collected between 1997 and 2009. Twentyfive hares were positive for at least one parasite (86 %). Six parasite species were isolated, 2 cesto

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3

Morales, G., and J. Cabaret. "Determinacion de las relaciones polimorficas entre Teladorsagia circumcincta (Stadelmann, 1894) y Teladorsagia trifurcata (Ransom, 1907) en condiciones experimentales." Memórias do Instituto Oswaldo Cruz 80, no. 1 (1985): 85–90. http://dx.doi.org/10.1590/s0074-02761985000100013.

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En el presente estudio se demostró que Teladorsagia circumcincta (Stadelmann, 1894) y T. trifurcata (Ransom, 1907), nemátodes Trichostrongylidae de la sub-família Ostertagiinae, parasitan un espectro de hospedadores similares. La ausencia de barreras reproductivas entre T. trifurcata y T. circumcincta, así como la estabilización rápida de las proporciones de las dos entidades en el seno de la población, evidencia que T. trifurcata es un morfo de T. circumcincta.

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4

Kuchboev, A., O. Amirov, G. Soliyeva, et al. "Morphological and molecular identification three species Teladorsagia (Nematoda: Trichostrongylidae) in sheep, Uzbekistan." IOP Conference Series: Earth and Environmental Science 939, no. 1 (2021): 012078. http://dx.doi.org/10.1088/1755-1315/939/1/012078.

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Abstract Comparative studies of three species T. circumcincta, T. trifurcata and T. davtiani, which are preliminarily different morphs of the same species, have been carried out in this paper. Insignificant differences in morphological sizes and characters between males were identified and fragments of ITS-2 ribosomal DNA of three species of the genus Teladorsagia were investigated. There were no sequence differences between T. circumcincta and T. trifurcata. Minor differences were noted between T. circumcincta and T. davtiani species at the level of 0.8%. With complete similarity between T. c

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5

STEAR, M. J., P. D. ECKERSALL, P. A. GRAHAM, Q. A. McKELLAR, S. MITCHELL, and S. C. BISHOP. "Fructosamine concentration and resistance to natural, predominantly Teladorsagia circumcincta infection." Parasitology 123, no. 2 (2001): 211–18. http://dx.doi.org/10.1017/s0031182001008253.

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Fructosamine concentrations reflect protein status and because infection with Teladorsagia circumcincta can induce a relative protein deficiency, we examined the usefulness of fructosamine concentrations as markers of the intensity of infection in naturally infected lambs. Fructosamine concentration was a heritable trait and variation in fructosamine concerntrations was associated with differences in body weight, and a variety of parasitological variables; animals with increased fructosamine concentrations grew more quickly, had increased faecal egg counts in one of the three study years, had

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6

Craig, B. H., J. G. Pilkington, and J. M. Pemberton. "Sex ratio and morphological polymorphism in an isolated, endemic Teladorsagia circumcincta population." Journal of Helminthology 84, no. 2 (2009): 208–15. http://dx.doi.org/10.1017/s0022149x09990551.

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AbstractTeladorsagia circumcincta is a polygamous nematode that exhibits morphological polymorphism. Sex ratio is typically female biased and the male nematodes occur in association with the genetically similar, minor morphotypes Teladorsagia davtiani and Teladorsagia trifurcata. In experimental infections, sex ratio (proportion male) and the proportion of minor male morphs observed have been shown to be influenced by both host and nematode-related factors. As similar investigations from natural systems are rare, this study examined whether sex ratio and minor male morph frequency were associa

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7

STEAR, M. J., N. G. HENDERSON, A. KERR, et al. "Eosinophilia as a marker of resistance to Teladorsagia circumcincta in Scottish Blackface lambs." Parasitology 124, no. 5 (2002): 553–60. http://dx.doi.org/10.1017/s0031182002001580.

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Faecal egg counts and peripheral blood eosinophil counts were taken from Scottish Blackface lambs following natural, predominantly Teladorsagia circumcincta infection. Peripheral eosinophil concentrations were higher in animals with lower egg counts but only in lambs that were at least 3 months of age. The reduced egg counts were due to reduced fecundity of T. circumcincta; there was no association with the number of adult T. circumcincta. Associations with the number of parasites from other species of gastrointestinal nematodes appeared to be neutral or favourable. Estimated heritabilities fo

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8

Yashica, K. A., D. B. Bhinasara, V. Prasanth, et al. "Benzimidazole resistance in Teladorsagia circumcincta of goats." Journal of Veterinary Parasitology 35, no. 2 (2021): 81–88. http://dx.doi.org/10.5958/0974-0813.2021.00014.0.

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9

Hafidi, Nur Nasuha, Jaclyn Swan, Pierre Faou, et al. "Teladorsagia Circumcincta Galectin-Mucosal Interactome in Sheep." Veterinary Sciences 8, no. 10 (2021): 216. http://dx.doi.org/10.3390/vetsci8100216.

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Abstract (sommario):

Teladorsagia circumcincta is the most important gastrointestinal parasite in the livestock industry in temperate regions around the world, causing great economic losses. The infective third-stage larvae (L3) of Teladorsagia circumcincta secrete a large number of excretory-secretory (E/S) molecules, some of which are likely to play critical roles in modulating the host immune response. One of the most abundant E/S molecules is a protein termed Tci-gal-1, which has similarity to mammalian galectins. Galectins are a family of carbohydrate-binding molecules, with characteristic domain organisation

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10

Umair, Saleh, Charlotte L. G. Bouchet, Qing Deng, Nikola Palevich, and Heather V. Simpson. "Characterisation of a Teladorsagia circumcincta glutathione transferase." Molecular and Biochemical Parasitology 239 (September 2020): 111316. http://dx.doi.org/10.1016/j.molbiopara.2020.111316.

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Tesi sul tema "Teladorsagia circumcincta"

1

Richardson, Katherine. "Studies on the population dynamics of Teladorsagia circumcincta." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366339.

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2

Gasnier, Nadine. "Isolement du nématode teladorsagia circumcincta au sein des fermes caprines : influence sur la variabilité morphologique, écologique et génétique." Tours, 1994. http://www.theses.fr/1994TOUR4027.

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Les études épidémiologiques sont nombreuses sur ce parasite. Les travaux relatifs à l'écologie sont assez rares, ceux concernant la morphométrie ou la génétique, très rares. Des études antérieures ont montré l'isolement des fermes caprines en ce qui concerne les infestations par les helminthes. Les méthodes d'élevage sont très différentes selon les fermes, et les populations parasitaires pourraient être diversifiées. L'objet du présent travail est d'estimer la variabilité morphologique, écologique et génétique du nématode teladorsagia circumcincta. Quatorze populations de t. Circumcincta prove

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3

Dumas, Elodie Jacquiet Philippe. "Étude expérimentale d'infestations d'ovins par Oestrus ovis et Teladorsagia circumcincta." [S.l.] : [s.n.], 2008. http://oatao.univ-toulouse.fr/2128/1/debouch_2128.pdf.

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4

Goldfinch, Gillian Margaret. "Observations on the abomasal proteome during Teladorsagia circumcincta infection in sheep." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4804.

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Abstract (sommario):

Teladorsagia circumcincta is a major financial burden on the UK sheep farming industry. Disease control is becoming increasingly difficult due to the rapid emergence of anthelmintic resistance. This has prompted the search for alternative, sustainable control measures, including vaccination. Vaccine design would be aided by a thorough knowledge of the mechanisms involved in immunity to T.circumcincta. Most research has focussed on humoral and cellular responses to infection with this nematode. This thesis focuses on the impact of infection with regards to the proteins found locally within the

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5

Craig, Hannah L. "Characterisation of potentially host-protective material from the abomasal parasite, Teladorsagia circumcincta." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/14734.

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Abstract (sommario):

The main aims of this study were to identify and characterise proteins from <i>T. circumcincta </i>that may induce a protective immune response in the host and to learn more about the biology of the worm. In order to identify possible protective antigens, a complementary DNA (cDNA) library prepared from adult worms was screened with serum from an animal that was protected against a single challenge infection after vaccination with a <i>T. circumcincta </i>protein fraction (S3 TSBP). Forty five immunopositive cDNA clones were identified, of which sixteen had homology to galectin. Of the remaini

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6

Ellis, Samantha Emma Elizabeth. "Interactions of Teladorsagia circumcincta with the ovine immune system : mimicry and vaccine development." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9618.

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Abstract (sommario):

Teladorsagia circumcincta, an economically-important abomasal nematode of small ruminants in temperate regions worldwide, is currently controlled with a combination of anthelmintics and pasture management. Anthelmintic resistance has emerged and vaccination is a potential alternative control strategy, as protective immunity in sheep can be acquired after repeated exposure to the parasite. Abomasal mucosal IgA responses in immune sheep have been correlated with delayed worm development and reduced faecal egg counts. However, recombinant vaccine development against parasitic nematodes has had li

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7

Dicker, Alison Jane. "Comparative gene expression studies of anthelmintic resistance in the parasitic nematode, Teladorsagia circumcincta." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2223/.

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Abstract (sommario):

Anthelmintic resistance in parasitic nematodes of small ruminants is widespread and, in some parts of the world, threatens the sustainability of sheep production. The mechanisms whereby parasitic nematodes become resistant to anthelmintics, particularly ivermectin, remain to be determined. The majority of studies to date have investigated target site mutations; relatively little attention has been paid to the role of gene expression changes. The present study focused on Teladorsagia circumcincta; the predominant parasitic gastrointestinal nematode species in the UK and the predominant resistan

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8

Tzelos, Thomas. "RNA interference in parasitic nematodes : from genome to control." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15906.

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Abstract (sommario):

Teladorsagia circumcincta is a parasitic nematode which is a major cause of ovine parasitic gastroenteritis in temperate climatic regions. The parasite has developed resistance to the major anthelmintic drug classes and this challenges its future control. Vaccination is a potential alternative control method since sheep are able to develop protective immunity against this parasite. Although potential vaccine candidates have been revealed, the increasing gene datasets suggest that vaccinetarget selection may be aided by screening methods such as RNAi. This is a reverse genetic mechanism that ca

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9

Craig, Nicola Margaret. "Cytokine gene expression in naïve and previously infected sheep and lambs after challenge with the abomasal nematode Teladorsagia circumcincta." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4433.

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Abstract (sommario):

The abomasal helminth Teladorsagia circumcincta is one of the most economically important parasites to affect the farming of sheep and goats. T.circumcincta infection is particularly detrimental to lambs, in which it can cause pronounced morbidity and severe production losses. Due to the spreading resistance of this parasite to all currently available classes of anthelmintic drugs, it is having an increasingly severe impact on the sheep industry with significant implications for sheep welfare. Infection of sheep with T.circumcincta triggers local changes in the abomasum characteristic of a T h

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10

Halliday, Aileen. "Ruminant immunity to abomasal parasites." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8804.

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Abstract (sommario):

The studies submitted herein have contributed to our understanding of ruminant immunology, host-parasite interactions during ruminant infection with nematode parasites, and potential vaccine strategies to combat parasitic gastroenteritis (PGE). PGE of sheep and cattle, caused by T. circumcincta and O. ostertagia respectively, is a major problem for the global farming industry both in terms of productivity and animal welfare. To date control of these parasites has relied on the use of anthelmintic drugs however the emergence of widespread anthelmintic resistance is driving the search for altern

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Capitoli di libri sul tema "Teladorsagia circumcincta"

1

Vu Tien Khang, J., J. Bouix, L. Gruner, et al. "A short term divergent selection in Romanov sheep on resistance to the internal parasite Teladorsagia circumcincta using natural or artificial challenge." In Book of Abstracts of the 47th Annual Meeting of the European Association for Animal Production. Brill | Wageningen Academic, 1996. https://doi.org/10.1163/9789004684225_025.

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Atti di convegni sul tema "Teladorsagia circumcincta"

1

Pimenov, I. A. "GASTROINTESTINAL NEMATODE FAUNA IN SMALL CATTLE IN THE EUROPEAN RUSSIA." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.322-327.

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Abstract (sommario):

Gastrointestinal nematodes of small cattle are common in all Russian regions and cause diseases that can have a pronounced negative effect on the animal body. In this regard, obtaining data on the species composition of nematodes dwelling in the digestive tract of small cattle in different regions of the European part of the Russian Federation is of great scientific and practical interest since it will allow for the right strategy to control them. The study material was collected in slaughterhouses in the Moscow Region where animals were delivered from the Oryol, Astrakhan and Moscow Regions,

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