scholarly journals A Survey of the Parasitic Helminths of Alien Rodents (Belly-banded squirrel Callosciurus erythraeus and nutria Myocastor coypus) in Japan

2003 ◽  
Vol 8 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Hiroshi MATSUDATE ◽  
Yasuko MIYOSHI ◽  
Noriko TAMURA ◽  
Koichi MURATA ◽  
Soichi MARUYAMA ◽  
...  
Keyword(s):  
Myocastor Coypus ◽  
Parasitic Helminths ◽  
Callosciurus Erythraeus

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

2009 ◽  
Vol 54 (3) ◽  
Author(s):  
María Rossin ◽  
Gabriela Varela ◽  
Juan Timi
Keyword(s):  
Life Cycle ◽  
Human Health ◽  
Source Population ◽  
Subterranean Rodents ◽  
Myocastor Coypus ◽  
Parasitic Helminths ◽  
Water Courses ◽  
Parasitological Survey ◽  
Swimmer's Itch ◽  
Severe Rash

AbstractStrongyloides 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.

Studies on transaminase reactions in some parasitic helminths

1966 ◽  
Vol 4 (2) ◽  
pp. 7 ◽  
Author(s):  
Yong Ok Min ◽  
Byong Seol Seo
Keyword(s):  
Parasitic Helminths

Callosciurus erythraeus�. En: SAyDS�SAREM (eds.) Categorizaci�n 2019 de los mam�feros de Argentina seg�n su riesgo de extinci�n.

2019 ◽  
Author(s):  
Mar�a Laura Guich�n ◽  
Ver�nica Ben�tez ◽  
Mariela Borgnia ◽  
Cecilia Gozzi ◽  
Gustavo Aprile ◽  
...  
Keyword(s):  
Callosciurus Erythraeus

scholarly journals The soluble glutathione transferase superfamily: role of Mu class in triclabendazole sulphoxide challenge in Fasciola hepatica

2021 ◽  
Vol 120 (3) ◽  
pp. 979-991
Author(s):  
Rebekah B. Stuart ◽  
Suzanne Zwaanswijk ◽  
Neil D. MacKintosh ◽  
Boontarikaan Witikornkul ◽  
Peter M. Brophy ◽  
...  
Keyword(s):  
In Vitro Culture ◽  
Liver Fluke ◽  
Glutathione Transferase ◽  
Fasciola Hepatica ◽  
Affinity Purification ◽  
Economic Loss ◽  
Differential Abundance ◽  
Parasitic Helminths

AbstractFasciola hepatica (liver fluke), a significant threat to food security, causes global economic loss for the livestock industry and is re-emerging as a foodborne disease of humans. In the absence of vaccines, treatment control is by anthelmintics; with only triclabendazole (TCBZ) currently effective against all stages of F. hepatica in livestock and humans. There is widespread resistance to TCBZ and its detoxification by flukes might contribute to the mechanism. However, there is limited phase I capacity in adult parasitic helminths with the phase II detoxification system dominated by the soluble glutathione transferase (GST) superfamily. Previous proteomic studies have demonstrated that the levels of Mu class GST from pooled F. hepatica parasites respond under TCBZ-sulphoxide (TCBZ-SO) challenge during in vitro culture ex-host. We have extended this finding by exploiting a sub-proteomic lead strategy to measure the change in the total soluble GST profile (GST-ome) of individual TCBZ-susceptible F. hepatica on TCBZ-SO-exposure in vitro culture. TCBZ-SO exposure demonstrated differential abundance of FhGST-Mu29 and FhGST-Mu26 following affinity purification using both GSH and S-hexyl GSH affinity. Furthermore, a low or weak affinity matrix interacting Mu class GST (FhGST-Mu5) has been identified and recombinantly expressed and represents a new low-affinity Mu class GST. Low-affinity GST isoforms within the GST-ome was not restricted to FhGST-Mu5 with a second likely low-affinity sigma class GST (FhGST-S2) uncovered. This study represents the most complete Fasciola GST-ome generated to date and has supported the potential of subproteomic analyses on individual adult flukes.

scholarly journals Cryptosporidium myocastoris n. sp. (Apicomplexa: Cryptosporidiidae), the Species Adapted to the Nutria (Myocastor coypus)

2021 ◽  
Vol 9 (4) ◽  
pp. 813
Author(s):  
Jana Ježková ◽  
Zlata Limpouchová ◽  
Jitka Prediger ◽  
Nikola Holubová ◽  
Bohumil Sak ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Clinical Signs ◽  
Prepatent Period ◽  
Cryptosporidium Species ◽  
The Novel ◽  
Myocastor Coypus ◽  
The Czech Republic ◽  
Molecular Analyses ◽  
Cryptosporidium Spp ◽  
Faecal Samples

Cryptosporidium spp., common parasites of vertebrates, remain poorly studied in wildlife. This study describes the novel Cryptosporidium species adapted to nutrias (Myocastor coypus). A total of 150 faecal samples of feral nutria were collected from locations in the Czech Republic and Slovakia and examined for Cryptosporidium spp. oocysts and specific DNA at the SSU, actin, HSP70, and gp60 loci. Molecular analyses revealed the presence of C. parvum (n = 1), C. ubiquitum subtype family XIId (n = 5) and Cryptosporidium myocastoris n. sp. XXIIa (n = 2), and XXIIb (n = 3). Only nutrias positive for C. myocastoris shed microscopically detectable oocysts, which measured 4.8–5.2 × 4.7–5.0 µm, and oocysts were infectious for experimentally infected nutrias with a prepatent period of 5–6 days, although not for mice, gerbils, or chickens. The infection was localised in jejunum and ileum without observable macroscopic changes. The microvilli adjacent to attached stages responded by elongating. Clinical signs were not observed in naturally or experimentally infected nutrias. Phylogenetic analyses at SSU, actin, and HSP70 loci demonstrated that C. myocastoris n. sp. is distinct from other valid Cryptosporidium species.

Adaptations in the Lipid and Energy Metabolism of Parasitic Helminths

1995 ◽  
Vol 46 (3-4) ◽  
pp. 206-215 ◽  
Author(s):  
Jaap J. Van Hellemond ◽  
Aloysius G.M. Tielens ◽  
Jos F.H.M. Brouwers
Keyword(s):  
Energy Metabolism ◽  
Parasitic Helminths

Novel cyclovirus detected in the intestinal contents of Taiwan squirrels (Callosciurus erythraeus thaiwanensis)

Virus Genes ◽  
2015 ◽  
Vol 51 (1) ◽  
pp. 148-151 ◽  
Author(s):  
Go Sato ◽  
Taketo Kawashima ◽  
Masahiro Kiuchi ◽  
Yukinobu Tohya
Keyword(s):  
Intestinal Contents ◽  
Callosciurus Erythraeus

Induction of surface fluidity in Trichinella spiralis larvae during penetration of the host intestine: simulation by cyclic AMP in vitro

Parasitology ◽  
1997 ◽  
Vol 114 (1) ◽  
pp. 71-77 ◽  
Author(s):  
J. MODHA ◽  
M. C. ROBERTS ◽  
M. W. KENNEDY ◽  
J. R. KUSEL
Keyword(s):  
Cyclic Amp ◽  
Trichinella Spiralis ◽  
Lateral Diffusion ◽  
Epithelial Tissue ◽  
Intestinal Epithelial ◽  
Parasitic Helminths ◽  
Intracellular Parasites ◽  
Fluid Properties ◽  
Lipid Probe

The lateral diffusion (DL) properties of the fluorescent lipid probe 5-N (octadecanoyl) aminofluorescein (AF18) inserted into the surface of muscle-stage larvae of Trichinella spiralis were investigated by fluorescence recovery after photobleaching. AF18 was not free to diffuse laterally in dormant larvae, and this remained unchanged after larval activation in vitro with trypsin and bile. However, a significant increase in surface fluidity of the probe was demonstrated (%R = 74·5; DL = 11·5 × 10−9 cm2/sec) when larvae invaded intestinal epithelial tissue following oral infection of mice. Membrane-permeant photoactivatable caged cyclic AMP was used to analyse the putative mechanism responsible for this increase in lateral diffusion in the parasite surface. Although incubation of larvae with 1–50 μM caged cAMP had no effect on surface fluidity, incubation with 100 μM caged cAMP induced a substantial increase in the lateral mobility of AF18 (%R = 64·3; DL = 8·3 × 10−11 cm2/sec) immediately following photo-activation of the caged messenger. This induced fluidity, however, was transient and the larval surface reverted to immobility within 15 min. These observations constitute the first reported measurement of the fluid properties of the surface of intracellular parasites, the first demonstration of the parasite surface fluidity altering as a result of host cell invasion and the first indication of a mechanism underlying changes in surface fluidity in parasitic helminths.

scholarly journals Parasitic Helminths and Arthropods of the Crested Serpent Eagle Spilornis cheela perplexus Swann, 1922 from the Yaeyama

2009 ◽  
Vol 41 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Tomoo Yoshino ◽  
Takano Shingaki ◽  
Manabu Onuma ◽  
Teruo Kinjo ◽  
Tokuma Yanai ◽  
...  
Keyword(s):  
Parasitic Helminths
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