The alteration in signal transduction parameters induced by the excretory-secretory product from Giardia lamblia.

abstract：:Parasite transmission can be altered via the removal of parasites by the ambient communities in which parasite-host interactions take place. However, the mechanisms driving parasite removal remain poorly understood. Using marine trematode cercariae as a model system, we investigated the effects of consumer and host bo...

journal_title：Parasitology

authors： Welsh JE,Hempel A,Markovic M,van der Meer J,Thieltges DW

更新日期：2019-03-01 00:00:00

abstract：:Vitellogenin synthesis by the fat body has been monitored using in vitro culture and immunoprecipitation. This system was found to be efficient for measuring vitellogenin production in both non-infected Tenebrio molitor and those infected with Hymenolepis diminuta. In fat bodies from infected beetles, vitellogenin pro...

journal_title：Parasitology

authors： Webb TJ,Hurd H

更新日期：1996-04-01 00:00:00

abstract：:We investigated spatial variation in the phylogenetic structure of host spectra in fleas parasitic on small mammals. Measures of phylogenetic host specificity ((phylogenetic species clustering (PSC) and phylogenetic species variability (PSV)) varied significantly more between than within flea species, but the proporti...

journal_title：Parasitology

authors： Krasnov BR,Pilosof S,Shenbrot GI,Khokhlova IS,Degen AA

更新日期：2014-02-01 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：:Previous studies of mating interactions between schistosome species from different evolutionary lineages in mice showed that mating is not random: heterospecific pairs form but, given the choice, the preference is for homospecific partners. Mating competition and change of mate were also demonstrated. Schistosoma mans...

journal_title：Parasitology

authors： Cosgrove CL,Southgate VR

更新日期：2002-09-01 00:00:00

abstract：:There is increasing support for the presence of viruses and virus-like particles inside protozoan cells. This study describes viral-like RNA molecules that have been detected in two species of Eimeria that infect the chicken. The RNA molecule identified in E. maxima has been characterized: subcellular fractionation st...

journal_title：Parasitology

authors： Ellis J,Revets H

更新日期：1990-10-01 00:00:00

abstract：:A delayed gamma distribution satisfactorily described the distribution of times to hatching of Ostertagia circumcincta eggs incubated in 0.1% saline at temperatures between 6 and 20 degrees C. Below 6 degree C hatching of eggs was extremely variable. The relationship between rates of development and temperature within...

journal_title：Parasitology

authors： Young RR,Anderson N,Overend D,Tweedie RL,Malafant KW,Preston GA

更新日期：1980-12-01 00:00:00

abstract：:Amoebiasis, infection by the protozoan parasite Entamoeba histolytica, remains a global health problem, despite the availability of effective treatment. While improved sanitation could lead to the eradication of this disease, it is unlikely that this will occur worldwide in the foreseeable future; thus alternative mea...

journal_title：Parasitology

authors： Stanley SL Jr

更新日期：2006-01-01 00:00:00

abstract：:Chagas infection is a major endemic disease affecting Latin American countries. The persistence of Trypanosoma cruzi generates a chronic inflammatory reactivity that induces an immune response directed to the host's tissues. The effectiveness of the treatment in the chronic phase is still unsatisfactory due, amongst o...

journal_title：Parasitology

authors： Fauro R,Lo Presti S,Bazan C,Baez A,Strauss M,Triquell F,Cremonezzi D,Negrete OS,Willhuber GC,Paglini-Oliva P,Rivarola HW

更新日期：2013-06-01 00:00:00

abstract：:The population of malaria-causing parasites is characterized by great genetic diversity. Knowledge of the polymorphism generation mechanism is a central issue for developing effective vaccines against malaria and understanding the parasite population structure. Plasmodium vivax genetic diversity has been explained in ...

journal_title：Parasitology

authors： Martinez P,Suarez CF,Cardenas PP,Patarroyo MA

更新日期：2004-04-01 00:00:00

abstract：:Canine leishmaniosis (CanL) is caused by the parasite Leishmania infantum and is a systemic disease, which can present with variable clinical signs, and clinicopathological abnormalities. Clinical manifestations can range from subclinical infection to very severe systemic disease. Leishmaniosis is categorized as a neg...

journal_title：Parasitology

authors： Hosein S,Blake DP,Solano-Gallego L

更新日期：2017-01-01 00:00:00

abstract：:The effect of sainfoin (Onobrychis viciifolia) hay consumption on the pathophysiology and local cellular responses of growing lambs during infection with Trichostrongylus colubriformis was investigated. Thirty-two lambs, 16 weeks of age, were allocated to 1 of 4 treatment groups (n=8) that were offered either grass (G...

journal_title：Parasitology

authors： Ríos-de Alvarez L,Greer AW,Jackson F,Athanasiadou S,Kyriazakis I,Huntley JF

更新日期：2008-08-01 00:00:00

abstract：:This review focuses on some of the more ground-shifting advances of recent decades, particularly those at the molecular and cellular level that illuminate mechanisms underpinning the natural ecology of tick-host-pathogen interactions and the consequent epidemiology of zoonotic infections in humans. Knowledge of compon...

journal_title：Parasitology

authors： Randolph SE

更新日期：2009-10-01 00:00:00

abstract：:Alveolar echinococcosis (AE) is a zoonotic parasitic diseases caused by a cestode parasite known as Echinococcus multilocularis. The parasite has a wildlife cycle with definitive hosts (foxes) and small mammals as intermediate hosts (rodents) while humans are the accidental hosts. Parasite infection pressure relation ...

journal_title：Parasitology

authors： Khan A,Ahmed H,Sohail A,Alam F,Simsek S

更新日期：2020-03-01 00:00:00

abstract：:Bile salts have been identified as an important trigger for excystation of Cryptosporidium oocysts but the hierarchy or synergism of this signal in relation to other triggers involved in excystation is poorly understood. In addition to excystation, bile salts have also been reported to increase the invasiveness of spo...

journal_title：Parasitology

authors： King BJ,Keegan AR,Phillips R,Fanok S,Monis PT

更新日期：2012-10-01 00:00:00

abstract：:This study quantifies the rate and intensity of re-infection with human hookworm and Schistosoma mansoni infection 12 months following successful treatment, and investigates the influence of socio-economic, geographical and environmental factors. A longitudinal study of 642 individuals aged over 5 years was conducted ...

journal_title：Parasitology

authors： Cundill B,Alexander N,Bethony JM,Diemert D,Pullan RL,Brooker S

更新日期：2011-09-01 00:00:00

abstract：:Understanding disease transmission is important to species management and human health. Host body condition, nutrition and disease susceptibility interact in a complex manner, and while the individual effects of these variables are well known, our understanding of how they interact and translate to population dynamics...

journal_title：Parasitology

authors： Tadiri CP,Dargent F,Scott ME

更新日期：2013-03-01 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：:The genomes of more than 20 helminths have now been sequenced. Here we perform a meta-analysis of all sequenced genomes of nematodes and Platyhelminthes, and attempt to address the question of what are the defining characteristics of helminth genomes. We find that parasitic worms lack systems for surface antigenic var...

journal_title：Parasitology

authors： Zarowiecki M,Berriman M

更新日期：2015-02-01 00:00:00

abstract：:Cryptosporidium parvum is a zoonotic protozoan parasite that mainly affects the ileum of humans and livestock, with the potential to cause severe enteric disease. We describe the complete life cycle of C. parvum in an in vitro system. Infected cultures of the human ileocecal epithelial cell line (HCT-8) were observed ...

journal_title：Parasitology

authors： Borowski H,Thompson RC,Armstrong T,Clode PL

更新日期：2010-01-01 00:00:00

abstract：:Evidence exists that lethal activity is associated with extracts from Eimeria tenella-infected caecal tissues. We examined tissues of the small intestine infected with other species of Eimeria for a similar lethal activity. Extracts were prepared from intestinal tissues of chickens infected with either E. acervulina, ...

journal_title：Parasitology

authors： McKenzie ME,Johnson J,Long PL

更新日期：1985-06-01 00:00:00

abstract：:While purine transport has been widely studied in protozoa, almost nothing is known about their capacity to salvage pyrimidines. Here, we report a Leishmania major transporter with high affinity for uracil (Km=0.32+/-0.07 microM) which we designated LmU1. This transporter displayed a high degree of specificity, as it ...

journal_title：Parasitology

authors： Papageorgiou IG,Yakob L,Al Salabi MI,Diallinas G,Soteriadou KP,De Koning HP

更新日期：2005-03-01 00:00:00

abstract：:The cumulative effect of co-infections between pathogen pairs on the haematological response of East African Short-horn Zebu calves is described. Using a longitudinal study design a stratified clustered random sample of newborn calves were recruited into the Infectious Diseases of East African Livestock (IDEAL) study ...

journal_title：Parasitology

authors： Van Wyk IC,Goddard A,de C Bronsvoort BM,Coetzer JA,Handel IG,Hanotte O,Jennings A,Lesosky M,Kiara H,Thumbi SM,Toye P,Woolhouse MW,Penzhorn BL

更新日期：2014-03-01 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：:This study was conducted to quantify the association between meteorological variables and incidence of Plasmodium falciparum in areas with unstable malaria transmission in Ethiopia. We used morbidity data pertaining to microscopically confirmed cases reported from 35 sites throughout Ethiopia over a period of approxim...

journal_title：Parasitology

authors： Abeku TA,De Vlas SJ,Borsboom GJ,Tadege A,Gebreyesus Y,Gebreyohannes H,Alamirew D,Seifu A,Nagelkerke NJ,Habbema JD

更新日期：2004-06-01 00:00:00

abstract：:Within the genus Cryptosporidium 2 lineages have evolved, one adapted to the acid environment of the stomach and abomasum, the other comprising parasites that multiply in the small intestine. We tested whether the release of sporozoites from oocysts, a process known as excystation, is triggered by conditions which mim...

journal_title：Parasitology

authors： Widmer G,Klein P,Bonilla R

更新日期：2007-10-01 00:00:00

abstract：:Malaria remains a major cause of human morbidity and mortality worldwide. Plasmodium falciparum, the most virulent of the 4 human Plasmodium species causing malaria, is potentially life threatening, is increasing in prevalence and is becoming even more resistant to in-use drugs. In light of the growing problem of mult...

journal_title：Parasitology

authors： Mahajan SS,Kamath VR,Ghatpande SS

更新日期：2005-10-01 00:00:00

abstract：:Electrophysiological and pharmacological techniques were used to study glutamatergic signalling in the parasitic nematode, Ascaris suum. Glutamate or kainate injections into whole worms produced a paralysed quasi-static posture similar to the waveform in behaving worms. The DE2 motorneuron class is a primary target. S...

journal_title：Parasitology

authors： Davis RE

更新日期：1998-05-01 00:00:00

abstract：:An enzymatic comparison has been made between isolates of Schistosoma mansoni from rats and humans in Guadeloupe and a Burundi isolate of S. rodhaini. Analyses of LDH, MDH, AcP, PGM, GPI, G6PDH and HK by isoelectric focusing provided no evidence for the involvement of S. rodhaini in the recent evolution of the schisto...

journal_title：Parasitology

authors： Rollinson D,Imbert-Establet D,Ross GC

更新日期：1986-08-01 00:00:00

abstract：:The presence of superoxide dismutase (SOD) activity in the bovine lungworm Dictyocaulus viviparus was examined using the xanthine-xanthine oxidase assay system and by non-denaturing PAGE followed by specific enzyme staining. High levels of activity were detected in excretory-secretory (ES) products of adult worms and ...

journal_title：Parasitology

authors： Britton C,Knox DP,Kennedy MW

更新日期：1994-08-01 00:00:00