abstract：:An overall 44% transplacental transmission rate was observed in 221 rats fed cysts of 12 Toxoplasma strains at 15 days of pregnancy, with a range of 0-90% transmission. Considerable variability in the transmission rate was seen among different groups of rats that received similar Toxoplasma inocula; this is attributed...

journal_title：Parasitology research

authors： Freyre A,Correa O,Falcón J,Mendez J,González M,Venzal JM

更新日期：2001-11-01 00:00:00

abstract：:Nested PCR was used as a diagnostic tool to investigate the presence of Echinococcus multilocularis tapeworm in protected species of carnivores in Slovakia. Twenty-three faecal samples from wolves, four samples from bears and three samples from lynx from the Muránska Planina mountains and eight samples from wolves fro...

journal_title：Parasitology research

authors： Martínek K,Kolárová L,Hapl E,Literák I,Uhrin M

更新日期：2001-10-01 00:00:00

abstract：:The nematode Teladorsagia circumcincta is a polymorphic species, morphs T. c. trifurcata and T. c. circumcincta being the most frequent. Among other traits, T. c. trifurcata has lower infectivity than T. c. circumcincta. Anthelmintic treatments that regularly remove populations should favour the more infective T. c. c...

journal_title：Parasitology research

authors： Leignel V,Cabaret J

更新日期：2001-09-01 00:00:00

abstract：:Two distinct genes encoding single domain, ATP-binding cassette transport protein homologues of Theileria parva were cloned and sequenced. Neither of the genes is tandemly duplicated. One gene, TpABC1, encodes a predicted protein of 593 amino acids with an N-terminal hydrophobic domain containing six potential membran...

journal_title：Parasitology research

authors： Kibe MK,Macklin M,Gobright E,Bishop R,Urakawa T,ole-MoiYoi OK

更新日期：2001-09-01 00:00:00

abstract：:Spermiogenesis of the pseudophyllidean tapeworm Eubothrium crassum has been described by the aid of transmission electron microscopy for the first time. Initially, early spermatids form a distal cytoplasmic protrusion, a differentiation zone containing a small electron-dense, apically oriented region. Out of this regi...

journal_title：Parasitology research

authors： Brunanská M,Nebesárová J,Scholz T,Fagerholm HP

更新日期：2001-08-01 00:00:00

abstract：:High resolution two-dimensional separation of Toxoplasma gondii tachyzoite lysate revealed up to 224 distinct protein spots in Coomassie-stained gel. Computional matching of 14 digitized gels yielded a standard two-dimensional proteome map. The excretory T. gondii dense granule proteins GRA1-GRA8, S16/acid phosphatase...

journal_title：Parasitology research

authors： Dlugonska H,Dytnerska K,Reichmann G,Stachelhaus S,Fischer HG

更新日期：2001-08-01 00:00:00

abstract：:Because benznidazole (BZL) was found to downregulate nitric oxide (NO) and cytokine synthesis by murine macrophages, we analyzed the potential immunological repercussions of BZL treatment in Trypanosoma cruzi-infected rats. To evaluate whether the effects of BZL were also observed in the presence of an immunostimulati...

journal_title：Parasitology research

authors： Piaggio E,Roggero E,Pitashny M,Wietzerbin J,Bottasso OA,Revelli SS

更新日期：2001-07-01 00:00:00

abstract：:Ribosomal RNA genes have been cloned from the major species of African trypanosomes. Complete nucleotide sequence composition of the small subunit (SSU) and portions of the large subunit (LSU) ribosomal RNA genes was determined for each of these trypanosome species. In contrast to the situation in Trypanosoma brucei, ...

journal_title：Parasitology research

authors： Urakawa T,Majiwa PA

更新日期：2001-06-01 00:00:00

abstract：:The use of the term guild community as an intermediate level between component and supra-community proves to be advantageous within the different steps of parasite communities. It can comprise more information than a component community but researchers are able to analyse important parts of the supra-community without...

journal_title：Parasitology research

authors： Zander CD

更新日期：2001-06-01 00:00:00

abstract：:Mosquito bites can elicit dermal hypersensitivity reactions, but little is known about the chemotactic factors for host leukocytes in mosquito saliva. In this study, we determined that saliva from a malarial vector mosquito, Anopheles stephensi, possesses intense neutrophil chemotactic activity. In contrast, the midgu...

journal_title：Parasitology research

authors： Owhashi M,Harada M,Suguri S,Ohmae H,Ishii A

更新日期：2001-05-01 00:00:00

abstract：:The proboscis apex of the eoacanthocephalan parasite Paratenuisentis ambiguus was studied, using electron and light microscopy, for a better understanding of the parasite's attachment at the intestinal wall of its definitive hosts (Anguilla rostrata and A. anguilla). The results suggest the presence of an epidermis co...

journal_title：Parasitology research

authors： Herlyn H

更新日期：2001-04-01 00:00:00

abstract：:The hypothesis of a positive correlation between host specificity and taxonomic diversification was tested in a family of fish ectoparasites, the Diplectanidae Bychowsky 1957 (Monogenea). A comparative analysis of correlation of species richness with host specificity was performed using an adapted independent contrast...

journal_title：Parasitology research

authors： Desdevises Y,Morand S,Oliver G

更新日期：2001-03-01 00:00:00

abstract：:Intraspecific variation in Schistosoma mansoni infection and modulation of its expression by vertebrate host genetics was studied by evaluation of some biological parameters of the infection in BALB/c and C57BL/6 mice infected with one Brazilian (BH) and two Venezuelan (YT and SM) laboratory strains of the parasite. M...

journal_title：Parasitology research

authors： Nino Incani R,Morales G,Cesari IM

更新日期：2001-02-01 00:00:00

abstract：:The taxonomic status of the two known strains of Schistosoma intercalatum, the Lower Guinea strain (originating from Edea, Cameroon) and the Zaire strain (originating from Kinshasa, Democratic Republic of Congo, formerly Zaire) was examined using random amplified polymorphic DNA (RAPD) markers. Two additional species ...

journal_title：Parasitology research

authors： Pagès JR,Durand P,Southgate VR,Tchuem Tchuenté LA,Jourdane J

更新日期：2001-01-01 00:00:00

abstract：:Protoscolices of Echinococcus granulosus were incubated in vitro with praziquantel (PZ), albendazole (ABZ), or a combination of both (PZ + ABZ). PZ and ABZ displayed slower protoscolicidal activity when applied separately than when used in combination. Despite the low PZ + ABZ concentrations used, protoscolex viabilit...

journal_title：Parasitology research

authors： Urrea-París MA,Moreno MJ,Casado N,Rodriguez-Caabeiro F

更新日期：2000-12-01 00:00:00

abstract：:The sequence, genomic organization, and transcription of the gene encoding the H2A histone protein of the protozoan parasite Trypanosoma rangeli is described in this paper. The locus encoding the T. rangeli H2A protein is formed by at least 11 gene units measuring 790 nucleotides in length, organized in tandem, and lo...

journal_title：Parasitology research

authors： Puerta C,Cuervo P,Thomas MC,Lopez MC

更新日期：2000-11-01 00:00:00

abstract：:Investigation with light and electron microscopy has been made of the cement apparatus of the mature male Neoechinorhynchus rutili, a parasite of Gasterosteus aculeatus. N. rutili possesses a single compact mass of glandular tissue (cement gland) with eight giant nuclei. The nucleus is lobe-shaped and has a conspicuou...

journal_title：Parasitology research

authors： Dezfuli BS

更新日期：2000-10-01 00:00:00

abstract：:Saprophytic soil fungi can exert ovicidal and ovistatic effects on helminths with differing degrees of efficiency. The representatives of such fungi from temperate regions, Paecilomyces lilacinus (Thom) Samson and P. marquandii (Masse) Hughes, exhibit recognized ovicidal activity on some nematodes. We evaluated the ac...

journal_title：Parasitology research

authors： Basualdo JA,Ciarmela ML,Sarmiento PL,Minvielle MC

更新日期：2000-10-01 00:00:00

abstract：:Macroscopically visible sarcocysts were observed in the skeletal muscles of naturally infected skinks of the genus Agama (infection rate 11.3%). Sarcocysts were described by means of transmission electron microscopy. These cysts measured 0.03-0.25 x 0.38-1.7 mm (mean 0.12 x 1.1 mm). Typical mature cysts were bordered ...

journal_title：Parasitology research

authors： Sakran TF

更新日期：2000-09-01 00:00:00

abstract：:Calcareous corpuscles, known as mineral concretions in Platyhelminthes, may have special biological functions. In the present study we succeeded in the quantitative separation of calcareous corpuscles in plerocercoids of Spirometra mansoni (sparganum) using Ficoll. Purified calcareous corpuscles were reacted with crud...

journal_title：Parasitology research

authors： Yang HJ

更新日期：2000-09-01 00:00:00

abstract：:We have recently demonstrated that the antimicrotubule drug oryzalin inhibits the growth of Entamoeba invadens as well as E. histolytica, the former being more resistant to the drug than the latter, and that effective doses of oryzalin are higher for Entamoeba than for the other parasitic protozoa examined thus far. T...

journal_title：Parasitology research

authors： Makioka A,Kumagai M,Ohtomo H,Kobayashi S,Takeuchi T

更新日期：2000-08-01 00:00:00

abstract：:Serine proteinases secreted by adult Trichinella spiralis were isolated from excretory/secretory products (ES) of in-vitro-cultured parasites by affinity chromatography with p-benzamidine-celite. The purified enzymes had molecular weights of approximately 18, 40, and 50 kDa and displayed enzyme activity against a rang...

journal_title：Parasitology research

authors： Todorova VK,Stoyanov DI

更新日期：2000-08-01 00:00:00

abstract：:During our investigations on helminthofauna in roe deer (Capreolus capreolus) and red deer (Cervus elaphus) in France (1985-1998) we isolated nematodes not only of the genus Haemonchus Cobb, 1898 but also of the genus Ashworthius Le Roux 1930, both of which belong to the same subfamily of Haemonchinae. The prevalence ...

journal_title：Parasitology research

authors： Ferté H,Cléva D,Depaquit J,Gobert S,Léger N

更新日期：2000-07-01 00:00:00

abstract：:A low molecular weight (LMW) antigen recognized by a murine monoclonal antibody (C(3)4F(1)) was localized within endogenous stages of Eimeria tenella (USDA strain 80). Using indirect fluorescent antibody assay and immunoelectron microscopy, the LMW antigen was found in: sporozoites, first, second and third generation ...

journal_title：Parasitology research

authors： Tennyson SA,Barta JR

更新日期：2000-06-01 00:00:00

abstract：:During the present investigation, alterations in the intrahepatic venous and portal systems in Rattus norvegicus infected with 250, 500, and 1000 Taenia taeniaeformis eggs were studied. The corrosion cast technique was employed, which provides an extrinsic opportunity for study of the three-dimensional orientation of ...

journal_title：Parasitology research

authors： Preet S,Prakash S

更新日期：2000-06-01 00:00:00

abstract：:Metazoan parasites of guilds of benthic snails and crustaceans and of four fish families--Gobiidae, Gasterosteidae, Syngnathidae, and Zoarcidae--were investigated off the brackish Salzhaff area (Southwest Baltic) in the semienclosed Salzhaff and the near Rerik Riff in the free Baltic. Comparisons revealed greater simi...

journal_title：Parasitology research

authors： Zander CD,Reimer LW,Barz K,Dietel G,Strohbach U

更新日期：2000-05-01 00:00:00

abstract：:In vitro leucocyte proliferative responses to parasite antigens and to mitogens as well as lymphocyte sub-types were compared in guinea pigs with genetically determined differences in their ability to express protective immunity against Trichostronylus colubriformis infection. Proliferative responses to parasite antig...

journal_title：Parasitology research

authors： Manjili MH,Sangster NC,Rothwell TL

更新日期：2000-04-01 00:00:00

abstract：:Prior studies have shown that filarial nematodes can effectively metabolize hydrogen peroxide in excess of that generated by activated host cells. However, the mechanisms of H2O2 removal by the filarial parasites are unclear. Herein we report the results of studies carried out on the biochemical activity and on immuno...

journal_title：Parasitology research

authors： Chandrashekar R,Tsuji N,Morales TH,Carmody AB,Ozols VO,Welton J,Tang L

更新日期：2000-03-01 00:00:00

abstract：:The levels of parasite-specific IgG1 and IgG2 antibodies and mitogen-induced and parasite-specific proliferative T-cell responses were determined in Litomosoides sigmodontis-infected Mastomys coucha throughout an observation period of 400 days post infection (p.i.). These were compared with the respective reactions in...

journal_title：Parasitology research

authors： Schönfeld K,Zahner H

更新日期：2000-02-01 00:00:00

abstract：:The published data concerning Toxoplasma gondii, Hammondia hammondi, H. heydorni and Neospora caninum on one side and between T. gondii on the other were neglected by most authors. As conclusion we are convinced that there are only two valid species: Isospora (Toxoplasma) gondii and Hammondia heydorni. The first inclu...

journal_title：Parasitology research

authors： Mehlhorn H,Heydorn AO

更新日期：2000-02-01 00:00:00

abstract：:Tachyzoites of Toxoplasma gondii attach to the macrophage surface and are internalized either by a phagocytic process, which can be inhibited by cytochalasin D, or by an active process, independent of host cell actin. Previous studies have shown that parasite attachment induces the secretion of macromolecules found in...

journal_title：Parasitology research

authors： Pacheco-Soares C,De Souza W

更新日期：2000-01-01 00:00:00

abstract：:Bimiracidial infections of Lymnaea ovata with Fasciola hepatica were performed under laboratory conditions to determine the susceptibility of snails from six French populations to trematode infection. In five populations of L. ovata the prevalence of infection in the 1-mm groups ranged between 2.7% and 43.7% at day 35...

journal_title：Parasitology research

authors： Dreyfuss G,Vignoles P,Rondelaud D

更新日期：2000-01-01 00:00:00

abstract：:Haplosporidian spores from Ostrea edulis, previously described as Minchinia armoricana, were reexamined by light and electron microscopy. These spores were either free among host cells or enclosed in sporocysts. They contained two long epispore cytoplasm extensions (ECE), each possessing cytoskeletal structures corres...

journal_title：Parasitology research

authors： Azevedo C,Montes J,Corral L

更新日期：1999-12-01 00:00:00

abstract：:The phylogenetic placement of gregarine parasites (Apicomplexa: Gregarinasina) within the Apicomplexa was derived by comparison of small-subunit ribosomal RNA gene sequences. Gregarine sequences were obtained from Gregarina niphandrodes Clopton, Percival, and Janovy, 1991, and Monocystis agilis Stein, 1848 (Eugregarin...

journal_title：Parasitology research

authors： Carreno RA,Martin DS,Barta JR

更新日期：1999-11-01 00:00:00

abstract：:The present work aimed at studying the possible association of HLA antigens with Entamoeba histolytica/E. dispar asymptomatic infection in a Mexican mestizo population. A case-control design was selected for evaluation of the role of genetic markers in parasite infection. For this purpose the HLA-A, HLA-B, and HLA-DR ...

journal_title：Parasitology research

authors： Valdez E,del Carmen Martínez M,Gómez A,Cedillo R,Arellano J,Pérez ME,Ramos F,Morán P,González E,Valenzuela O,Melendro EI,Ramiro M,Kretschmer R,Muñoz O,Ximénez C

更新日期：1999-10-01 00:00:00

abstract：:Investigations on the occurrence of trichodinid ciliates from fish caught in the Kiel Bight and Kiel Fjord (western Baltic Sea) were carried out between September 1996 and March 1997. Smears of the gills, fins, and skin of 120 Gadus morhua and 92 Platichthys flesus caught by fish traps and trammel nets revealed the pr...

journal_title：Parasitology research

authors： Palm HW,Dobberstein RC

更新日期：1999-08-01 00:00:00

abstract：:Four controlled studies, one each in Australia, Germany, the United Kingdom, and the United States, involving 30 calves each were conducted to evaluate the effect of simulated rainfall on the efficacy of Ivomec Pour-On against infections of Cooperia spp. At 3 weeks before treatment the calves were infected orally with...

journal_title：Parasitology research

authors： Rehbein S,Barrick RA,Batty AF,Drag MD,Rolfe PF,Cox JL

更新日期：1999-08-01 00:00:00

abstract：:Filter-feeding molluscan shellfish can concentrate environmentally derived waterborne pathogens of humans, which can be utilized in the sanitary assessment of water quality. In the present study, oocysts of Cryptosporidium were detected in Bent mussels (Ischadium recurvum) at two Chesapeake Bay sites from which C. par...

journal_title：Parasitology research

authors： Graczyk TK,Fayer R,Lewis EJ,Trout JM,Farley CA

更新日期：1999-07-01 00:00:00

abstract：:The progressive visceral infection caused in golden hamsters by Leishmania donovani amastigotes led to gradual impairment of the proliferative response of their splenic (SPMC) or peripheral blood (PBMC) mononuclear cells to in vitro stimulation with leishmanial antigen, with mitogen (concanavalin A), and even with a c...

journal_title：Parasitology research

authors： Dasgupta S,Mookerjee A,Chowdhury SK,Ghose AC

更新日期：1999-07-01 00:00:00

abstract：:The purpose of our study was to assess the effects of experimental dicroceliosis on the antioxidant defense capability of the liver in hamsters. Studies were carried out at 80 and 120 days after infection with an oral dose of 40 metacercariae of Dicrocoelium dendriticum. The parasitic pathology was ascertained by the ...

journal_title：Parasitology research

authors： Sánchez-Campos S,Tuñón MJ,González P,González-Gallego J

更新日期：1999-06-01 00:00:00