Eimeria tenella, E. acervulina and E. maxima: studies on the development of resistance to diclazuril and other anticoccidial drugs in the chicken.

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：:This cross-sectional study aimed to determine the prevalence and risk factors of S. stercoralis infection among 1142 Orang Asli primary schoolchildren in six different states of Peninsular Malaysia. Fecal samples were examined using direct smear, formalin-ether sedimentation (FES), agar plate culture (APC) and PCR tec...

journal_title：Parasitology

authors： Al-Mekhlafi HM,Nasr NA,Lim YAL,Elyana FN,Sady H,Atroosh WM,Dawaki S,Anuar TS,Noordin R,Mahmud R

更新日期：2019-10-01 00:00:00

abstract：:Lactating and nulliparous outbred Swiss (CF-1 strain) mice were infected at 12-16 weeks of age with Nippostrongylus brasiliensis or Trichinella spiralis. Lysophospholipase B levels in the intestinal tissue and faecal pellets were greatly in infected lactating mice in contrast to infected nulliparous mice. Correlated w...

journal_title：Parasitology

authors： Ngwenya BZ

更新日期：1980-08-01 00:00:00

abstract：:Investigations were carried out into the properties and localization of chitin synthase (EC 2.4.1.16) in connection with the formation of Ascaris suum egg-shells. The chitin synthase of eggs exhibited properties very similar to those found in other chitin-synthesizing organisms. It was stimulated by the presence of AT...

journal_title：Parasitology

authors： Dubinský P,Rybos M,Turceková L

更新日期：1986-02-01 00:00:00

abstract：:We have previously reported that the mechanisms of neuromyopathic damage induced by Trypanosoma cruzi are mediated by T cells and are parasite-strain dependent. In the present study our aim was to determine whether the humoral response against muscle and nervous system is also parasite-strain dependent. Of the sera fr...

journal_title：Parasitology

authors： Tekiel VS,Mirkin GA,Gonzalez Cappa SM

更新日期：1997-11-01 00:00:00

abstract：:If the deleterious effects of non-specific parasites are greater on vulnerable host species than on reservoir host species then exclusion of the vulnerable host through apparent competition is more likely. Evidence suggests that such a mechanism occurs in interactions between the ring-necked pheasant (Phasianus colchi...

journal_title：Parasitology

authors： Tompkins DM,Greenman JV,Hudson PJ

更新日期：2001-02-01 00:00:00

abstract：:SUMMARY The necessity to easily establish Histomonas meleagridis cultures has been underlined extensively by many researchers in order to gain more insights in the biology of H. meleagridis. In addition the occurrence of different protozoa in the caeca of birds impedes, however, the isolation and propagation of H. mel...

journal_title：Parasitology

authors： Pham AD,Mast J,DE Gussem JK,McDougald LR,Goddeeris BM

更新日期：2013-09-01 00:00:00

abstract：:Intra-erythrocytic stages of malaria parasites can alter the surface of their host cells and release toxins which induce the production of cytokines, which in turn can up- or down-regulate the expression of adhesion receptors on the surface of microvascular endothelial cells. New adhesion receptors on endothelial cell...

journal_title：Parasitology

authors： Hommel M

更新日期：1997-01-01 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：:When eggs of the monogenean Dictyocotyle coeliaca, a parasite from the body cavity of Raja naevus, are incubated in alternating 12 h periods of light and darkness at 12 degrees C the marginal hooklets appear between 75 and 90 days after collecting the eggs from the host's body cavity and hatching begins after about 10...

journal_title：Parasitology

authors： Kearn GC

更新日期：1975-02-01 00:00:00

abstract：:The biodiversity of Trypanosoma cruzi is one of the main factors complicating the understanding of its molecular epidemiology. As an alternative to classical genetic methods, investigators have used DNA-mediated transformation techniques to study this diversity. Recently, transient expression data were shown to correl...

journal_title：Parasitology

authors： Laurent JP,Swindle J

更新日期：1999-12-01 00:00:00

abstract：:Trials were carried out to study the humoral immune response of blackflies to filariae following infection using the intrathoracic injection technique. An induced 66 kDa protein was abundant in the haemolymph of the European species Simulium ornatum following infection with bovine Onchocerca lienalis. This protein was...

journal_title：Parasitology

authors： Hagen HE,Grunewald J,Ham PJ

更新日期：1994-12-01 00:00:00

abstract：:The development of drug resistance by the present Houghton strain of Eimeria tenella to the quinolones, methyl benzoquate and buquinolate, was found to take place after a single experimental passage. The development of resistance was independent of drug selection pressure and showed cross resistance to other quinolone...

journal_title：Parasitology

authors： Chapman HD

更新日期：1975-08-01 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：:A deterministic mathematical model which predicts the probability of developing a new drug-resistant parasite population within the human host is reported. The model incorporates the host's specific antibody response to PfEMP1, and also investigates the influence of chemotherapy on the probability of developing a viab...

journal_title：Parasitology

authors： Gatton ML,Hogarth W,Saul A

更新日期：2001-12-01 00:00:00

abstract：:New treatment strategies for schistosomiasis should be evaluated, since resistant strains to the only available drug, Praziquantel, have already been described. Thus, we demonstrated antiparasitic effects of ethanolic extracts of Jatropha gossypiifolia and Piper arboreum on cercariae and adult worms of Schistosoma man...

journal_title：Parasitology

authors： da Silva Alves RR,Mendes Rodrigues JG,Teles-Reis A,Araújo Nogueira R,Correia Lima Licá I,Sampaio Lira MG,da Silva Alves R,Silva-Souza N,Aguiar Dos Santos Andrade TJ,Silva Miranda G

更新日期：2020-12-01 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：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：: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：:Of the 7 genetic assemblages of the parasite Giardia duodenalis only 2 (A and B) are known to cause infections in humans. These assemblages have been characterized in detail at the genomic level but few studies have examined differences in the proteins expressed. Employing one and two-dimensional PAGE we have identifi...

journal_title：Parasitology

authors： Steuart RF,O'Handley R,Lipscombe RJ,Lock RA,Thompson RC

更新日期：2008-12-01 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：:The biological parameters which generate seasonal fluctuations in the size of populations of Caryophyllaeus laticeps are examined in detail. A mathematical model is formulated to describe the dynamics of the adult parasite within the fish host Abramis brama, and the predictions of the model are compared with observed ...

journal_title：Parasitology

authors： Anderson RM

更新日期：1976-06-01 00:00:00

abstract：:In the context of a broader program dealing with the symbiotic associations of apple snails, we sampled three species that coexist in Lake Regatas (Palermo, Buenos Aires, Argentina). The population of Asolene platae, (but not those of Pomacea canaliculata and Pomacea scalaris) showed trematode larvae (echinocercariae ...

journal_title：Parasitology

authors： Dellagnola FA,Montes MM,Martorelli SR,Vega IA

更新日期：2019-06-01 00:00:00

abstract：:Guinea worm disease, dracunculiasis or dracontiasis, is an ancient disease with records going back over 4500 years, but until the beginning of the 20th century, little was known about its life cycle, particularly how humans became infected. In 1905, Robert Thomas Leiper was sent by the British colonial authorities to ...

journal_title：Parasitology

authors： Tayeh A,Cairncross S,Cox FEG

更新日期：2017-10-01 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：:Infection by larval Echinococcus granulosus is usually characterized by tight inflammatory control. However, various degrees of chronic granulomatous inflammation are also observed, reaching a high point in infection of cattle by the most prevalent parasite strain worldwide, which is not well adapted to this host spec...

journal_title：Parasitology

authors： Basika T,Muñoz N,Casaravilla C,Irigoín F,Batthyány C,Bonilla M,Salinas G,Pacheco JP,Roth J,Durán R,Díaz A

更新日期：2012-02-01 00:00:00

abstract：:The ultrastructure of the seminal vesicle, ejaculatory duct, cirrus sac and cirrus is described. The epithelium of the seminal vesicle consists of a single layer of squamous to cuboidal cells. The apical ends of the cells have thin polymorphic lamellae and long narrow pits, both of which enclose normal spermatozoa. Th...

journal_title：Parasitology

authors： Threadgold LT

更新日期：1975-12-01 00:00:00

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：:Schistosomiasis is a health problem in Brazil and the role of rodents in maintaining the schistosome life-cycle requires further clarification. The influence of Schistosoma mansoni on a population of Nectomys squamipes was studied by capture-recapture (1st phase, from June 1991 to November 1995) and removal (2nd phase...

journal_title：Parasitology

authors： D'Andrea PS,Maroja LS,Gentile R,Cerqueira R,Maldonado Júnior A,Rey L

更新日期：2000-06-01 00:00:00

abstract：:A novel tetrahydroquinolinyl ester, quinfamide, administered orally in multiple doses for 3 days had an ED50 of 0.25 mg/kg/day (total dose 0.75 mg/kg) for eradicating Entamoeba criceti in hamsters in several tests. It was significantly more active by direct comparison than 3 commercially available amoebicides and at l...

journal_title：Parasitology

authors： Slighter RG,Yarinsky A,Drobeck HP,Bailey DM

更新日期：1980-08-01 00:00:00