Anti-oxidant enzymes in Cryptosporidium parvum oocysts.

abstract：:In a population of copepods (Cyclops strenuus abyssorum), with a naturally high prevalence of infection with procercoids of Diphyllobothrium spp., no difference in body size was found between infected and uninfected hosts. However, a significant reduction in the reproductive capacity of infected females was observed, ...

journal_title：Parasitology

authors： Pasternak AF,Huntingford FA,Crompton DW

更新日期：1995-05-01 00:00:00

abstract：:With the increased availability of multilocus sequence data, the lack of concordance of gene trees estimated for independent loci has focused attention on both the biological processes producing the discord and the methodologies used to estimate phylogenetic relationships. What has emerged is a suite of new analytical...

journal_title：Parasitology

authors： Knowles LL,Klimov PB

更新日期：2011-11-01 00:00:00

abstract：:Depending on the extent of evolutionary divergence among parent taxa, hybrids may suffer from a breakdown of co-adapted genes or may conversely exhibit vigour due to the heterosis effect, which confers advantages to increased genetic diversity. That last mechanism could explain the success of hybrids when hybridizatio...

journal_title：Parasitology

authors： Planade B,Lena JP,Li H,Plenet S,Guegan JF,Thomas F,Hurtrez-Bousses S,Renaud F,Joly P

更新日期：2009-08-01 00:00:00

abstract：:Sera from goats and cattle that were infected with two Trypanosoma vivax clones (ILDat 1.2 and ILDat 2.1) derived from different stocks were analysed for antibody activity against the variable surface glycoproteins (VSGs) of the infecting clones by enzyme-linked immune assays (ELISA) and immune lysis. To obtain purifi...

journal_title：Parasitology

authors： Vos GJ,Gardiner PR

更新日期：1990-02-01 00:00:00

abstract：:The abundance of Profilicollis botulus was monitored in eider ducks for 3 years. No significant difference in P. botulus abundance was found between eiders taken alive and those collected dead from the shore line, or between adult males and adult females. Adult male eiders had a seasonal pattern of infection. Incubati...

journal_title：Parasitology

authors： Thompson AB

更新日期：1985-12-01 00:00:00

abstract：:A study carried out on a sheep farm examined whether Toxoplasma gondii foetal infection and associated abortion occur in successive lambings. We identified 29 ewes that gave birth to lambs on at least 2 successive years over our study period, 2000-2003. Tissue samples from the progeny of these ewes were analysed by PC...

journal_title：Parasitology

authors： Morley EK,Williams RH,Hughes JM,Thomasson D,Terry RS,Duncanson P,Smith JE,Hide G

更新日期：2008-02-01 00:00:00

abstract：:Expression of metalloprotease activities during metacyclogenesis of a series of strains and clones of Trypanosoma cruzi was investigated using SDS-polyacrylamide gel electrophoresis with a range of different co-polymerized proteolytic substrates. A complex pattern of metalloprotease expression, with considerable quant...

journal_title：Parasitology

authors： Lowndes CM,Bonaldo MC,Thomaz N,Goldenberg S

更新日期：1996-04-01 00:00:00

abstract：:As more facts emerge regarding the ways in which E. multilocularis-derived molecules trigger the host immune response and modulate the host-parasite interplay, it becomes possible to envisage how the parasite can survive and proliferate in its intermediate host, while in other hosts it dies out. Through effects on cel...

journal_title：Parasitology

authors： Mejri N,Hemphill A,Gottstein B

更新日期：2010-03-01 00:00:00

abstract：:We tested whether the prevalence of ticks can be predicted reliably from a simple epidemiological model that takes into account only mean abundance and its variance. We used data on the abundance and distribution of larvae and nymphs of 2 ixodid ticks parasitic on small mammals (Apodemus agrarius, Apodemus flavicollis...

journal_title：Parasitology

authors： Stanko M,Krasnov BR,Miklisova D,Morand S

更新日期：2007-01-01 00:00:00

abstract：:Voltage-gated calcium (Ca2+) channels contribute to impulse propagation in excitable cells and also regulate intracellular levels of Ca2+. High voltage-activated (HVA) Ca2+ channels are heteromultimeric membrane proteins. The pore-forming, voltage-sensing subunit is the alpha1 subunit. We have cloned 3 HVA Ca2+ channe...

journal_title：Parasitology

authors： Kohn AB,Lea J,Roberts-Misterly JM,Anderson PA,Greenberg RM

更新日期：2001-11-01 00:00:00

abstract：:The efficiency of treatment of human infections with the unicellular eukaryotic pathogens such as fungi and protozoa remains deeply unsatisfactory. For example, the mortality rates from nosocomial fungemia in critically ill, immunosuppressed or post-cancer patients often exceed 50%. A set of six systemic clinical azol...

journal_title：Parasitology

authors： Lepesheva GI,Friggeri L,Waterman MR

更新日期：2018-12-01 00:00:00

abstract：:The Calliphoridae include some of the most economically significant myiasis-causing flies in the world - blowflies and screwworm flies - with many being notorious for their parasitism of livestock. However, despite more than 50 years of research, key taxonomic relationships within the family remain unresolved. This st...

journal_title：Parasitology

authors： McDonagh LM,Stevens JR

更新日期：2011-11-01 00:00:00

abstract：:An enzyme-linked immunosorbent assay (ELISA) was used to detect antibodies to Encephalitozoon cuniculi in man, using spores derived from tissue culture as antigen. Negligible cross-reactions were found with other microsporidia of vertebrate or of invertebrate origin and there was no cross-reaction with Toxoplasma gond...

journal_title：Parasitology

authors： Hollister WS,Canning EU

更新日期：1987-04-01 00:00:00

abstract：:Intact, viable adults, infective and newborn larvae of Trichinella pseudospiralis were surface labelled with 125I by the chloramine T method and labelled proteins were compared with those obtained from equivalent stages of T. spiralis. Electron-microscope autoradiography determined that labelled proteins were restrict...

journal_title：Parasitology

authors： Almond NM,McLaren DJ,Parkhouse RM

更新日期：1986-08-01 00:00:00

abstract：:Entomopathogenic nematode infective juveniles are likely to encounter both uninfected and infected insects and host quality depends on the stage of the infection. We hypothesized that nematode response to infected hosts will change over the course of an infection. Here, we tested this hypothesis by focusing on the inf...

journal_title：Parasitology

authors： Ramos-Rodríguez O,Campbell JF,Christen JM,Shapiro-Ilan DI,Lewis EE,Ramaswamy SB

更新日期：2007-05-01 00:00:00

abstract：:The pentastomid parasite, Raillietiella frenata, is native to Asia where it infects the Asian House gecko, Hemidactylus frenatus. This gecko has been widely introduced and recently R. frenata was found in introduced populations of cane toads (Rhinella marina) in Australia, indicating a host-switch from introduced geck...

journal_title：Parasitology

authors： Kelehear C,Saltonstall K,Torchin ME

更新日期：2015-04-01 00:00:00

abstract：:Small RNAs are important regulators of gene expression. They were first identified in Caenorhabditis elegans, but it is now apparent that the main small RNA silencing pathways are functionally conserved across diverse organisms. Availability of genome data for an increasing number of parasitic nematodes has enabled bi...

journal_title：Parasitology

authors： Britton C,Laing R,Devaney E

更新日期：2020-07-01 00:00:00

abstract：:Why do parasites kill their hosts? During this past decade, research in three different areas; evolutionary ecology, medical microbiology, and population genetics has provided theory and data that address this and related questions of selection and the evolution and maintenance of parasite virulence. A general theory ...

journal_title：Parasitology

authors： Levin BR,Svanborg Edén C

更新日期：1990-01-01 00:00:00

abstract：:Cryptosporidia are important protozoan parasites of vertebrates, and a number of species and genotypes, with different host ranges, have been described. In this study a protocol was established for the detection and the genetic characterization of Cryptosporidium spp. isolated from various types of surface waters (riv...

journal_title：Parasitology

authors： Ward PI,Deplazes P,Regli W,Rinder H,Mathis A

更新日期：2002-04-01 00:00:00

abstract：:This study evaluated the effectiveness of low doses of benznidazole (BNZ) on continuous administration (BNZc), combined with allopurinol (ALO), in C57BL/6J and C3H/HeN mice infected with Trypanosoma cruzi Nicaragua strain and T. cruzi Sylvio-X10/4 clone. TcN-C57BL/6J was also treated with intermittent doses of BNZ (BN...

journal_title：Parasitology

authors： Rial MS,Scalise ML,López Alarcón M,Esteva MI,Búa J,Benatar AF,Prado NG,Riarte AR,Fichera LE

更新日期：2019-03-01 00:00:00

abstract：:We examined the mechanism of action and compared the anthelmintic efficacy of cysteine proteinases from papaya, pineapple, fig, kiwi fruit and Egyptian milkweed in vitro using the rodent gastrointestinal nematode Heligmosomoides polygyrus. Within a 2 h incubation period, all the cysteine proteinases, with the exceptio...

journal_title：Parasitology

authors： Stepek G,Buttle DJ,Duce IR,Lowe A,Behnke JM

更新日期：2005-02-01 00:00:00

abstract：:The reproductive effort of Lepeophtheirus pectoralis (Müller O. F., 1776), a caligid copepod, which is commonly found infecting the European flounder, Platichthys flesus (Linnaeus, 1758), is studied in detail for the first time. Seasonal variation in body dimensions and reproductive effort are analysed. Data for 120 o...

journal_title：Parasitology

authors： Frade DG,Santos MJ,Cavaleiro FI

更新日期：2016-01-01 00:00:00

abstract：:Harnessing the full utility of extensive gene sequences recently available for the economically important sea louse, Lepeophtheirus salmonis, requires the adaptation of modern molecular biology approaches to this non-model organism. Using a putative microsomal prostaglandin E synthase type-2 (PGES2) as a candidate gen...

journal_title：Parasitology

authors： Campbell EM,Pert CC,Bowman AS

更新日期：2009-07-01 00:00:00

abstract：:Several approaches were adopted for the disruption and removal of the tegumental surface from protoscoleces of the horse strain of the hydatid organism, Echinococcus granulosus. The effectiveness of each method and the purity of subsequent microthrix-enriched fractions obtained by differential centrifugation were eval...

journal_title：Parasitology

authors： McManus DP,Barrett NJ

更新日期：1985-02-01 00:00:00

abstract：SUMMARY:Clinical isolates from 3 microsporidia species, Encephalitozoon intestinalis and Encephalitozoon hellem, and the insect parasite Anncaliia (Brachiola, Nosema) algerae, were used in spore germination and enterocyte-like (C2Bbe1) cell infection assays to determine the effect of a panel of antimicrobial peptides. ...

journal_title：Parasitology

authors： Leitch GJ,Ceballos C

更新日期：2009-02-01 00:00:00

abstract：:Heparin-binding proteins (HBPs) play a key role in Trypanosoma cruzi-host cell interactions. HBPs recognize heparan sulfate (HS) at the host cell surface and are able to induce the cytoadherence and invasion of this parasite. Herein, we analysed the biochemical properties of the HBPs and also evaluated the expression ...

journal_title：Parasitology

authors： Oliveira FO Jr,Alves CR,Silva FS,Côrtes LM,Toma L,Bouças RI,Aguilar T,Nader HB,Pereira MC

更新日期：2013-02-01 00:00:00

abstract：:The glycolytic enzyme triosephosphate isomerase catalyses the isomerization between glyceraldehyde 3-phosphate and dihydroxyacetone phosphate. Here we report that Trichomonas vaginalis contains 2 fully functional tpi genes. Both genes are located in separated chromosomal context with different promoter regulatory elem...

journal_title：Parasitology

authors： Figueroa-Angulo EE,Estrella-Hernández P,Salgado-Lugo H,Ochoa-Leyva A,Gómez Puyou A,Campos SS,Montero-Moran G,Ortega-López J,Saab-Rincón G,Arroyo R,Benítez-Cardoza CG,Brieba LG

更新日期：2012-11-01 00:00:00

abstract：:The present study was undertaken to investigate the antiparasitic activity of extracellular products of Streptomyces albus. Bioactivity-guided isolation of chloroform extracts affording a compound showing potent activity. The structure of the compound was elucidated as salinomycin (SAL) by EI-MS, 1H NMR and 13C NMR. I...

journal_title：Parasitology

authors： Yao JY,Gao MY,Jia YY,Wu YX,Yin WL,Cao Z,Yang GL,Huang HB,Wang CF,Shen JY,Gu ZM

更新日期：2019-04-01 00:00:00

abstract：:Post-mesocyclic development of Trypanosoma brucei in the tsetse fly in its migration from midgut to salivary glands, was revisited by sequential microdissection, morphometry and DNA-cytofluorometry. This development started by day 6 after the infective feed, with passage of mesocyclic midgut trypomastigotes through pr...

journal_title：Parasitology

authors： Van Den Abbeele J,Claes Y,van Bockstaele D,Le Ray D,Coosemans M

更新日期：1999-05-01 00:00:00

abstract：:This study reports that inhibition of Leishmania Topo-I with the minor groove-binding ligands (MGBLs) Hoechst 33342 (Ho342) blocks parasite growth in culture by mechanisms involving DNA breakage. While Ho342 inhibited the replication of several species of Leishmania in a dose- and time-dependent manner, Ho258 was not ...

journal_title：Parasitology

authors： Marquis JF,Drolet M,Olivier M

更新日期：2003-01-01 00:00:00