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The Polish collection of parasitic helminths (a report on realization of works concerning fusion of parasitic collections dispersed among different scientific institutions)

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Pojmanska T., Salamatin R., Sulgostowska T., Cielecka D., Okulewicz A., Niewiadomska K., Grytner-Ziecina B.

Annals of Parasitology

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2012

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tom 58

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nr 2

The paper presents the results of works on preparation of a proper museum collection of parasitic helminths gathered by the Polish scientists and dispersed in various scientific institutions. The collection composed of 11 author’s collections and a special collection of available typical series of species described by the Polish authors has been deposited in the Museum of Natural History of Wroclaw University. It includes almost 16.000 slides with 90 taxons of Monogenea, 251 Trematoda, 144 Cestoda, 43 Nematoda, 11 Acanthocephala, in total 486 nominal species and 53 taxons of genus level. Among them 12 species appear new for fauna of Poland; for 57 species new hosts in Polish territory have been recorded; two new species of Cestoda have been described in separate publications. A special paragraph contains a checklist of all species described by the Polish scientists with information whether they are available in any other collection. Detailed information about every deposited slide is given in the Database available online at http://www.helminths.eu

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Strongyloides myopotami in ctenomyid rodents: Transition from semi-aquatic to subterranean life cycle

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Rossin M. A., Varela G., Timi J. T.

Acta Parasitologica

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2009

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tom 54

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nr 3

257-262

Strongyloides myopotami, a parasite of Myocastor coypus (nutria or coypu), was found during an extensive parasitological survey carried out on parasitic helminths of 5 species of subterranean rodents (tuco-tucos) belonging to the genus Ctenomys from Argentina and Uruguay. Strongyloides myopotami became known by causing “marsh itch” (also called “nutria itch” or “swimmer’s itch”), a severe rash caused by larvae that enter the skin in humans, and it is recognised as a zoonosis for people handling nutria fur. In the present study S. myopotami was found in 2 of the 5 examined species of Ctenomys (C. talarum from Argentina and C. pearsoni from Uruguay), both inhabiting the vicinity of water courses. Population descriptors of S. myopotami in C. talarum showed that a population of this parasite is well established in this rodent. The development of infective filariform larvae from eggs in the faeces of C. talarum and the prevalence of gravid parasitic females in this host can be considered as evidence of the establishment of a population of S. myopotami independent of the source population parasitizing M. coypus. Therefore, the presence of S. myopotami in these species of tuco-tucos indicates a change from a semi-aquatic to subterranean life cycle. Evidence that tuco-tucos are reservoirs for these nematodes and therefore may be a risk to human health in the areas studied is provided.

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First survey of parasitic helminths of goats along the Han River in Hubei Province, China

84%

Yang X., Gasser R. B., Fang R., Zeng J., Zhu K., Qi M., Zhang Z., Tan L., Lei W., Zhou Y., Zhao J., Hu M.

Acta Parasitologica

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2016

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tom 61

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nr 3

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Glycogen is metabolized in organelles-glycosomes

83%

Kielan Rybicka K.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

5

Vaccination of rats against the rodent hookworm Nippostrongylus brasiliensis with a recombinant superoxide dismutase fails to protect against infection

67%

Ball G., Knox D. P.

Acta Parasitologica

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2009

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tom 54

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nr 3

281-287

Anti-oxidant enzymes including superoxide dismutase (SOD) protect cells from damage by oxygen radicals produced during respiration. There is also a substantial body of evidence that anti-oxidant enzymes facilitate the survival of parasitic helminths, including gastrointestinal nematodes, within the host. Superoxide dismutase has been shown to be released by a variety of parasitic helminths and may protect them from host mediated oxidative immune responses. As it may play a parasite protective role during infections SOD has been investigated as a vaccine candidate in a range of helminth parasites including Schistosoma mansoni, Acanthocheilonema viteae and Haemonchus contortus. Here, we sought to evaluate the protective potential of SOD against the rat hookworm Nippostrongylus brasiliensis, a commonly utilised laboratory infection, as a vaccination model. A cytosolic SOD from this parasite, with high sequence homology to a putative extracellular form of the enzyme was cloned and then expressed in bacteria. The resultant recombinant protein was assessed for enzyme activity and used to immunise rats prior to a single challenge infection with the parasite. No protection was observed and monitoring systemic and mucosal antibody responses and mast cell protease levels in superoxide dismutase vaccinated rats suggested that this recombinant SOD was only weakly immunogenic.

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Assessment of Akodon cursor (Rodentia, Sigmodontinae) as permissive host to Schistosoma mansoni infection: morphology of adult worms

67%

Machado-Silva J. R., Heisler Neves R., Rodrigues-Silva R., Figueiredo de Oliveira R. M., Maldonado Junior A.

Acta Parasitologica

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2011

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tom 56

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nr 2

The natural infection with parasitic helminths is common in wild rodent populations. Once such interactions are better understood in the laboratory, it will be more feasible to extend the findings to infected hosts in nature. The flukes recovered from laboratory-infected Akodon cursor at 63 days post-infection were stained with hydrochloric carmine and individually mounted on glass slide as whole-mounts. Light and laser scanning confocal microscopy studies of adult male and female Schistosoma mansoni are reported. The parasites were examined morphologically and biometrically, which was obtained in a digital system for image analysis. Parameters used were: tegument thickness, digestive, excretory and reproductive systems. The overall conclusion of this experiment is that the morphological features of adult worm were similar to laboratory mice. It has been confirmed that the grass mouse is a permissive host to S. mansoni infection.

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FMRFamide-related peptides [FaRPs] in helminth parasites

67%

Halton D. W., Maule A. G., Marks N. J., Fellowes R. A., Shaw C.

Acta Parasitologica

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1999

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tom 44

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nr 1

Neuropeptides are ubiquitous intercellular signalling molecules in all Metazoa with nervous systems. Research over the past 10 years has confirmed through immunocytochemistry that neuropeptides are widespread and abundant in the nervous systems of helminth parasites. Biochemical isolation and characterisation studies have indentified the primary structures of numerous structurally- related peptides in helminths, the best studied being the FMRFamide-related peptides (FaRPs). While to date only four FaRPs have been identified from platyhelminths, some 60 FaRPs or FaRP-like peptides have been isolated or predicted for nematodes. Preliminary physiological studies have shown that FaRPs are strongly myoactive, but with quite different actions in the two groups of helminth parasite. The absence of FaRPs from vertebrates suggests compounds with a high affinity for FaRP receptors are likely to have selective effects against helminths and, if protected from degradation, could have therapeutic potential.

Ograniczanie wyników

The Polish collection of parasitic helminths (a report on realization of works concerning fusion of parasitic collections dispersed among different scientific institutions)

Strongyloides myopotami in ctenomyid rodents: Transition from semi-aquatic to subterranean life cycle

First survey of parasitic helminths of goats along the Han River in Hubei Province, China

Glycogen is metabolized in organelles-glycosomes

Vaccination of rats against the rodent hookworm Nippostrongylus brasiliensis with a recombinant superoxide dismutase fails to protect against infection

Assessment of Akodon cursor (Rodentia, Sigmodontinae) as permissive host to Schistosoma mansoni infection: morphology of adult worms

FMRFamide-related peptides [FaRPs] in helminth parasites