Microgametogony of Sarcocystis hirsuta in the intestine of the cat.

abstract：:Development and forward migration of Leishmania parasites in the sandfly gut is accompanied by morphological transformation to highly motile, non-dividing 'metacyclic' forms. Previous studies in vitro have demonstrated that this metacyclogenesis is associated with developmentally regulated changes in expression of two...

journal_title：Parasitology

authors： Davies CR,Cooper AM,Peacock C,Lane RP,Blackwell JM

更新日期：1990-12-01 00:00:00

abstract：:Genome sequencing has greatly contributed to our understanding of parasitic protozoa. This is particularly the case for Cryptosporidium species (phylum Apicomplexa) which are difficult to propagate. Because of their polymorphic nature, simple sequence repeats have been used extensively as genotypic markers to differen...

journal_title：Parasitology

authors： Widmer G

更新日期：2018-08-01 00:00:00

abstract：:A culture chamber fitted with a polycarbonate sieve has been used to isolate Plasmodium knowlesi merozoites as they are released from schizonts. A 3 mum pore-size sieve allows passage of normal erythrocytes and red cells containing rings and trophozoites and can be used to concentrate schizonts from a mixed cell popul...

journal_title：Parasitology

authors： Dennis ED,Mitchell GH,Butcher GA,Cohen S

更新日期：1975-12-01 00:00:00

abstract：:Oocysts of fowl coccidia, suspended in a 12% aqueous solution of alginic acid, were dropped into 5% calcium chloride solution to form beads. Following ingestion by chicks, excystation of sporozoites was not affected. Oocyst viability was best when beads were air-dried to 33% of their original weight and stored in airt...

journal_title：Parasitology

authors： Norton CC,Joyner LP

更新日期：1986-06-01 00:00:00

abstract：:Since 2004 there has been a remarkable increment in our knowledge of the proteins and glycans that reside at, or are released from the surfaces of schistosomes in the mammalian host. Initial characterization of the soluble proteome permits distinctions to be made between the parasite secretome and its necrotome. The p...

journal_title：Parasitology

authors： Wilson RA

更新日期：2012-08-01 00:00:00

abstract：:The isolation of 2 genomic clones has allowed us to further characterize a Schistosoma mansoni serine protease designated SmSP1. The deduced amino acid sequence (248aa) considered as a 'light chain' encoding the active site, presents significant homologies with mouse plasma kallikrein and human factor I light chain. T...

journal_title：Parasitology

authors： Cocude C,Pierrot C,Cêtre C,Fontaine J,Godin C,Capron A,Khalife J

更新日期：1999-04-01 00:00:00

abstract：:Like in other trypanosomatids D-glucose is a crucial source of energy to Trypanosoma rangeli, a non-pathogenic parasite that in Central and South America infects triatomine vectors and different mammalian species, including humans. In several trypanosome species, D-glucose transporters were already described and clone...

journal_title：Parasitology

authors： Miletti LC,Koerich LB,Pacheco LK,Steindel M,Stambuk BU

更新日期：2006-12-01 00:00:00

abstract：:Oesophagostomum dentatum stages were investigated for glutathione S-transferase (GST) expression at the protein and mRNA levels. GST activity was detected in all stages (infectious and parasitic stages including third- and fourth-stage larvae of different ages as well as males and females) and could be dose-dependentl...

journal_title：Parasitology

authors： Joachim A,Ruttkowski B

更新日期：2008-09-01 00:00:00

abstract：:Recombinant ribosomal DNA sequences were amplified by PCR and used as probes to perform a fingerprint analysis of total DNA from different Entamoeba histolytica isolates. RFLPs obtained with one of the probes, R-1, support previous proposals that pathogenic and non-pathogenic E. histolytica are closely related, yet ge...

journal_title：Parasitology

authors： Cruz-Reyes JA,Spice WM,Rehman T,Gisborne E,Ackers JP

更新日期：1992-04-01 00:00:00

abstract：:Renal infections by parasitic ciliates were studied in adult snails of Helix aspersa aspersa and Helix aspersa maxima collected from 2 mixed rearing system-based heliciculture farms located in Galicia (NW Spain). The occurrence of ciliates was also examined in slugs (Deroceras reticulatum) invading the greenhouses whe...

journal_title：Parasitology

authors： Segade P,Kher CP,Lynn DH,Iglesias R

更新日期：2009-06-01 00:00:00

abstract：OBJECTIVE:Unravelling the determinants of parasite life-history traits in natural settings is complex. Here, we deciphered the relationships between biotic, abiotic factors and the variation in 4 life-history traits (body size, egg presence, egg number and egg size) in the fish ectoparasite Tracheliastes polycolpus. We...

journal_title：Parasitology

authors： Loot G,Poulet N,Brosse S,Tudesque L,Thomas F,Blanchet S

更新日期：2011-06-01 00:00:00

abstract：:Microvilli are developed on the surface of Schistosoma mansoni schistosomula during penetration of the host skin; they form rapidly but are lost approximately 90 min after penetration. Identical microvilli are also formed on schistosomula which have penetrated a mouse skin preparation in vitro, and on schistosomula pr...

journal_title：Parasitology

authors： McLaren DJ,Hockley DJ

更新日期：1976-10-01 00:00:00

abstract：:The flatworm nervous system employs a wide repertoire of neuroactive substances, including small chemical messengers, the so called classical transmitters, and several types of neuropeptides. A large body of research accumulated over four decades has provided a wealth of information on the tissue localization and effe...

journal_title：Parasitology

authors： Ribeiro P,El-Shehabi F,Patocka N

更新日期：2005-01-01 00:00:00

abstract：:Life-cycle stages of the microsporidia Nosema bombycis, the pathogen causing silkworm pebrine, were separated and purified by an improved method of Percoll-gradient centrifugation. Soluble protein fractions of late sporoblasts (spore precursor cells) and mature spores were analysed by two-dimensional polyacrylamide ge...

journal_title：Parasitology

authors： Cai S,Lu X,Qiu H,Li M,Feng Z

更新日期：2011-08-01 00:00:00

abstract：:We have recently identified 2 surface proteins in Entamoeba histolytica as intermediate subunits of galactose- and N-acetyl-D-galactosamine-inhibitable lectin (EhIgl1 and EhIgl2); these proteins both contain multiple CXXC motifs. Here, we report the molecular characterization of the corresponding proteins in Entamoeba...

journal_title：Parasitology

authors： Tachibana H,Cheng XJ,Kobayashi S,Okada Y,Itoh J,Takeuchi T

更新日期：2007-12-01 00:00:00

abstract：:A recombinant baculovirus-expressed hybrid protein containing epitopes for the C-terminal fragment of the Plasmodium falciparum precursor to the major merozoite surface antigens (PMMSA) and the tetrapeptide repeats of the circumsporozoite protein (CSP) was assessed for its immunogenicity. Murine MHC-II restriction of ...

journal_title：Parasitology

authors： Lockyer MJ,Cooper H,Tite J,Rowan W,Crowe JS

更新日期：1993-06-01 00:00:00

abstract：:Uptake of radioactivity labelled purine bases and nucleosides by suspensions of Trypanosoma brucei and Trypanosoma congolense in bicine buffer was determined at 37 degrees C. With T. brucei, the rate of uptake of adenosine was much greater than that of the other compounds tested, the uptake of which decreased in the o...

journal_title：Parasitology

authors： James DM,Born GV

更新日期：1980-10-01 00:00:00

abstract：:Potential mechanisms of immunoregulation have been investigated for the capacity to generate heterogeneity in the outcome of infection with helminth parasites. We have developed a mathematical model of the interaction between T cell and parasite populations, based on the assumption that activation of a Th1 CD4+ T cell...

journal_title：Parasitology

authors： Schweitzer AN,Anderson RM

更新日期：1992-12-01 00:00:00

abstract：:Solid experimental evidence indicates that EBA-175 is used as a ligand by the Plasmodium falciparum merozoite to bind to human RBC, via different binding processing fragments. Using synthetic peptides and specific receptor-ligand interaction methodology, we have identified 6 high-activity binding sequences from the EB...

journal_title：Parasitology

authors： Rodriguez LE,Urquiza M,Ocampo M,Suarez J,Curtidor H,Guzman F,Vargas LE,Triviños M,Rosas M,Patarroyo ME

更新日期：2000-03-01 00:00:00

abstract：:Immunological and structural changes in the thymus and pronephros of Cyprinus carpio infected with the blood fluke, Sanguinicola inermis for 30 days, and exposed to 0.5 mg NH4+/1 for 48 and 168 h were investigated. Ultrastructural observations revealed cell disruption and highly vacuolated cytoplasm in the thymus. Of ...

journal_title：Parasitology

authors： Schuwerack PM,Lewis JW,Hoole D,Morley NJ

更新日期：2001-03-01 00:00:00

abstract：:Trypanosomatids represent the causative agents of major diseases in humans, livestock and plants, with inevitable suffering and economic hardship as a result. They are also evolutionarily highly divergent organisms, and the many unique aspects of trypanosome biology provide opportunities in terms of identification of ...

journal_title：Parasitology

authors： Field MC,Adung'a V,Obado S,Chait BT,Rout MP

更新日期：2012-08-01 00:00:00

abstract：:An egg-adapted line of Eimeria necatrix has now been passaged 40 times in the chorio-allantoic membranes of embryonated eggs. Between the 21st and 40th passage in eggs the parasite was subjected to a selection for precocious development, and its pre-patent period in this host is now 123-125 h. The parasite continued t...

journal_title：Parasitology

authors： Shirley MW,Bellatti MA,Millard BJ

更新日期：1982-04-01 00:00:00

abstract：:Adult Onchocerca volvulus worms obtained by enzyme digestion from nodules of infected Mexicans were radio-isotope labelled by the chloramine-T or Bolton-Hunter methods. No antigenic determinants were detected in extracts of worms labelled by the chloramine-T method but 3 antigens were detected in extracts of the Bolto...

journal_title：Parasitology

authors： Philipp M,Gómez-Priego A,Parkhouse RM,Davies MW,Clark NW,Ogilvie BM,Beltrán-Hernández F

更新日期：1984-10-01 00:00:00

abstract：:By means of conventional light microscopical and counting procedures, estimations have been made of the average number and size of ovarian balls from unfertilized and fertilized female Moniliformis dubius. The observations were made on worms recovered from experimental primary infections lasting 1, 2, 3, 4, 5, 8, 11, ...

journal_title：Parasitology

authors： Crompton DW,Arnold S

更新日期：1976-08-01 00:00:00

abstract：:The current World Health Organization strategic plan targets the elimination of schistosomiasis as a public health problem by 2025 and accurate diagnostics will play a pivotal role in achieving this goal. DNA-based detection methods provide a viable alternative to some of the commonly used tests, notably microscopy an...

journal_title：Parasitology

authors： Weerakoon KG,Gordon CA,Cai P,Gobert GN,Duke M,Williams GM,McManus DP

更新日期：2017-07-01 00:00:00

abstract：:An animal's social behaviour both influences and changes in response to its parasites. Here we consider these bidirectional links between host social behaviours and parasite infection, both those that occur from ecological vs evolutionary processes. First, we review how social behaviours of individuals and groups infl...

journal_title：Parasitology

authors： Hawley DM,Gibson AK,Townsend AK,Craft ME,Stephenson JF

更新日期：2020-10-23 00:00:00

abstract：:In this study, we describe the molecular analysis of zinc-metalloproteases from the abomasal nematode Ostertagia ostertagi which were exclusively recognized by local antibodies of immune cattle. Full-length or partial coding sequences of 4 different zinc-metalloprotease cDNAs of Ostertagia (met-1, -2, -3 and -4) were ...

journal_title：Parasitology

authors： De Maere V,Vercauteren I,Geldhof P,Gevaert K,Vercruysse J,Claerebout E

更新日期：2005-01-01 00:00:00

abstract：:We investigated intestinal trichomonads in western lowland gorillas, central chimpanzees and humans cohabiting the forest ecosystem of Dzanga-Sangha Protected Area in Central African Republic, using the internal transcribed spacer (ITS) region and SSU rRNA gene sequences. Trichomonads belonging to the genus Tetratrich...

journal_title：Parasitology

authors： Petrželková KJ,Smejkalová P,Céza V,Pafčo B,Shutt-Phillips KA,Todd A,Jirků-Pomajbíková K,Benavides J,Modrý D,Čepička I

更新日期：2020-02-01 00:00:00

abstract：:Theileria annulata infects and reversibly transforms bovine leucocytes. The parasite-transformed cells are immortalized, metastatic and express a number of metalloproteinases including matrix metalloproteinase 9 which they secrete. All the metalloproteinases observed on substrate gels are inhibited by tissue inhibitor...

journal_title：Parasitology

authors： Adamson RE,Hall FR

更新日期：1996-11-01 00:00:00

abstract：:The statistical aggregation of parasites among hosts is often described empirically by the negative binomial (Poisson-gamma) distribution. Alternatively, the Poisson-lognormal model can be used. This has the advantage that it can be fitted as a generalized linear mixed model, thereby quantifying the sources of aggrega...

journal_title：Parasitology

authors： Elston DA,Moss R,Boulinier T,Arrowsmith C,Lambin X

更新日期：2001-05-01 00:00:00