Electron microscopy of Eimeria acervulina macrogametogony and oocyst wall formation.

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：:Dr David Livingstone died on May 1st 1873. He was 60 years old and had spent much of the previous 30 years walking across large stretches of Southern Africa, exploring the terrain he hoped could provide new environments in which Europeans and Africans could cohabit on equal terms and bring prosperity to a part of the ...

journal_title：Parasitology

authors： Barrett MP,Giordani F

更新日期：2017-10-01 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：:The transmission success of Onchocerca volvulus is thought to be influenced by a variety of regulatory or density-dependent processes that act at various points in the two-host life-cycle. This paper examines one component of the life-cycle, namely, the ingestion of microfilariae by the simuliid vector, to assess the ...

journal_title：Parasitology

authors： Basáñez MG,Boussinesq M,Prod'hon J,Frontado H,Villamizar NJ,Medley GF,Anderson RM

更新日期：1994-01-01 00:00:00

abstract：:Strongyloides ratti is a parasitic nematode of rats. The host immune response against S. ratti affects the development of its free-living generation, favouring the development of free-living adult males and females at the expense of directly developing, infective 3rd-stage larvae. However, how the host immune response...

journal_title：Parasitology

authors： Crook M,Viney ME

更新日期：2005-09-01 00:00:00

abstract：:Toxoplasma gondii is an obligate intracellular protozoan parasite. The objective of the present study was to examine the behaviour of Toxoplasma gondii RH Ankara strain tachyzoites in a cell culture environment. The study represents the first step in determining whether T. gondii RH Ankara strain tachyzoites, grown in...

journal_title：Parasitology

authors： Döskaya M,Degirmenci A,Ciçek C,Ak M,Korkmaz M,Gürüz Y,Uner A

更新日期：2006-03-01 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：: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：:Freshwater snails of the Bulinus forskalii group are one of four Bulinus species complexes responsible for the transmission of schistosomes in Africa and adjacent regions. The species status of these conchologically variable and widely distributed planorbids remains unclear, and parasite compatibility varies considera...

journal_title：Parasitology

authors： Jones CS,Rollinson D,Mimpfoundi R,Ouma J,Kariuki HC,Noble LR

更新日期：2001-01-01 00:00:00

abstract：:Highly purified mitochondrial fractions have been isolated from the intraerythrocytic stages of two mammalian Plasmodium spp., Plasmodium yoelii of rodents and Plasmodium falciparum of man. Mitochondria of the former parasite are cristate whereas those of the latter are essentially acristate. Isolated mitochondria fro...

journal_title：Parasitology

authors： Fry M,Beesley JE

更新日期：1991-02-01 00:00:00

abstract：:The occurrence of multiple-clone Plasmodium falciparum haploid blood-stage infections is a pre-requisite for cross-fertilization and genetic exchange at the diploid stage in the mosquito. Using monoclonal antibodies against 3 polymorphic blood-stage antigens, a method of two-colour differential immunofluorescence allo...

journal_title：Parasitology

authors： Conway DJ,Greenwood BM,McBride JS

更新日期：1991-08-01 00:00:00

abstract：:We estimate the incidence rate, serological conversion rate and basic case reproduction number (R0) of Leishmania infantum from a cohort study of 126 domestic dogs exposed to natural infection rates over 2 years on Marajó Island, Pará State, Brazil. The analysis includes new methods for (1) determining the number of s...

journal_title：Parasitology

authors： Quinnell RJ,Courtenay O,Garcez L,Dye C

更新日期：1997-08-01 00:00:00

abstract：:Neurological involvement following trypanosome infection has been recognised for over a century. However, there are still many unanswered questions concerning the mechanisms used by the parasite to gain entry to the CNS and the pathogenesis of the resulting neuroinflammatory reaction. There is a paucity of material fr...

journal_title：Parasitology

authors： Rodgers J

更新日期：2010-12-01 00:00:00

abstract：:We have studied the genomic organization and transcription of the histone H2A genes in the protozoan parasite Leishmania infantum. In the parasite genome 2 gene clusters exist, each containing 3 H2A gene copies. Sequence analyses showed the existence of significant sequence divergence among the H2A genes, mainly in th...

journal_title：Parasitology

authors： Soto M,Quijada L,Larreta R,Iborra S,Alonso C,Requena JM

更新日期：2003-08-01 00:00:00

abstract：:In this review, we envisage the host environment, not as a hostile one, since the schistosome thrives there, but as one in which the relationship between the two organisms consists of constant communication, through signalling mechanisms involving sense organs, surface glycocalyx, surface membrane and internal organs ...

journal_title：Parasitology

authors： Kusel JR,Al-Adhami BH,Doenhoff MJ

更新日期：2007-10-01 00:00:00

abstract：:Circumstantial evidence suggests that the earlier detachment of Boophilus microplus larvae from highly resistant cattle follows the release of histamine at the attachment site. In vivo and in vitro experiments show that a proportion of the larvae will detach following injection or infusion of histamine. Other mediator...

journal_title：Parasitology

authors： Kemp DH,Bourne A

更新日期：1980-06-01 00:00:00

abstract：:During the course of Schistosoma mansoni murine infection there is a dramatic increase of some immunoglobulins and S. mansoni-specific antibodies. The most substantial response is initiated after 40 days of infection and results in a prolonged increase of total IgG1, IgM and IgA. The maximum increase is respectively 2...

journal_title：Parasitology

authors： Bout D,Rousseaux R,Carlier Y,Capron A

更新日期：1980-04-01 00:00:00

abstract：:Feulgen-pararosaniline (SO2) staining was performed on stages in the life-cycle of Isospora (Toxoplasma) gondii, Eimeria tenella, Sarcocystis cruzi and Plasmodium berghei. The fluorescence emission of the stained DNA in nuclei of these stages was examined and compared with absorption microscopy measurements at 560 nm ...

journal_title：Parasitology

authors： Cornelissen AW,Overdulve JP,Van der Ploeg M

更新日期：1984-02-01 00:00:00

abstract：:Leishmania donovani causes visceral disease (kala-azar), a major health problem throughout the tropics with 500 000 new cases every year. Leishmania differentiates from the promastigote to the amastigote form to establish infection in a mammalian host. To understand the process of differentiation, we assessed the glob...

journal_title：Parasitology

authors： Srividya G,Duncan R,Sharma P,Raju BV,Nakhasi HL,Salotra P

更新日期：2007-10-01 00:00:00

abstract：:Stability of trichostrogylid populations indicates that some form of density-dependent regulation occurs which could act through fecundity. We present evidence for intraspecific density-dependent effects in 1 of 2, dominant, abomasal nematodes species (Ostertagia gruehneri) of Svalbard reindeer (Rangifer tarandus plat...

journal_title：Parasitology

authors： Irvine RJ,Stien A,Dallas JF,Halvorsen,Langvatn R,Albon SD

更新日期：2001-06-01 00:00:00

abstract：:Small vessels showing inflammatory cell infiltrates were invariably observed in the vicinity of intact Toxoplasma tissue cysts within the brains of mice congenitally infected with the protozoan. Lymphocytes were observed in intimate contact with the luminal aspect of the endothelium, penetrating into the thickened bas...

journal_title：Parasitology

authors： Sims TA,Hay J

更新日期：1995-02-01 00:00:00

abstract：:The snail Bulinus nasutus 1214 possesses a potent haemagglutinin (end-point titre with human erythrocytes, 2(-18)) in its cell-free haemolymph which also binds to the miracidia (but not other larvae) of the incompatible parasite Schistosoma margrebowiei. We have purified a protein possessing this haemagglutinating pro...

journal_title：Parasitology

authors： Harris RA,Preston TM,Southgate VR

更新日期：1993-02-01 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：:The localization of adult Schistosoma mansoni originating from Guadeloupe (West Indies) was analysed in the natural host Rattus rattus in experimental and natural infections. A transfer of schistosomes from the porto-mesenteric system to the lungs occurs between the 4th and the 20th weeks post-infection, with a peak b...

journal_title：Parasitology

authors： Imbert-Establet D,Combes C

更新日期：1992-02-01 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：: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：:A cDNA clone codifying ribosomal protein L25 was isolated from a Leishmania braziliensis cDNA gene library. The alignment of the amino acid sequence deduced from this gene with other proteins revealed that this protein is related to the L23/25 rihosomal protein family. This is so because this protein shows, in its C-t...

journal_title：Parasitology

authors： González AC,Martínez E,Carmelo E,Piñero JE,Alonso V,Del Castillo A,Valladares B

更新日期：2002-07-01 00:00:00

abstract：:Eukaryotic 5S rRNA, synthesized by RNA polymerase III (Pol III), is an essential component of the large ribosomal subunit. Most organisms contain hundreds of 5S rRNA genes organized into tandem arrays. However, the genome of the protozoan parasite Leishmania major contains only 11 copies of the 5S rRNA gene, which are...

journal_title：Parasitology

authors： Moreno-Campos R,Florencio-Martínez LE,Nepomuceno-Mejía T,Rojas-Sánchez S,Vélez-Ramírez DE,Padilla-Mejía NE,Figueroa-Angulo E,Manning-Cela R,Martínez-Calvillo S

更新日期：2016-12-01 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：:Anti-trypanosomiasis vaccination still remains the best theoretical option in the fight against a disease that is continuously hovering between its wildlife reservoir and its reservoir in man and livestock. While antigenic variation of the parasite surface coat has been considered the major obstacle in the development...

journal_title：Parasitology

authors： Magez S,Caljon G,Tran T,Stijlemans B,Radwanska M

更新日期：2010-12-01 00:00:00