Abstract:
:Schistosoma mansoni sporocysts originally derived from monomiracidially infected Biomphalaria glabrata snails were serially transplanted into the cephalopedal sinus of anesthetized snails by the microsurgical implantation of fragments of parasitized hepatopancreas and ovotestis. Three to six passages each of five male and five female clones were maintained for as long as 2.0 years. Of the recipient snails which survived surgery, 87% released cercariae, usually beginning 5-7 weeks after surgery. The percentage of snails which released cercariae increased with successive passages. The mean survival time of surgically infected snails after cercarial emergence began was 9.2 +/- 0.5 weeks, nearly the same as that of miracidially infected snails. Longevities of snails infected with male or female clones were similar. Recipient snail size and age did not influence cloning success. Beginning 5 weeks from the onset of cercarial emergence large numbers of cercariae (a mean of 3900/snail from male clones and 1300/snail from females) were obtained during each shedding period. These results clearly demonstrate that the microsurgical transplantation of sporocysts is a practical means of maintaining and expanding populations of genetically homogeneous schistosomes (clones).
journal_name
Exp Parasitoljournal_title
Experimental parasitologyauthors
Cohen LM,Eveland LKdoi
10.1016/0014-4894(84)90056-0subject
Has Abstractpub_date
1984-02-01 00:00:00pages
15-9issue
1eissn
0014-4894issn
1090-2449pii
0014-4894(84)90056-0journal_volume
57pub_type
杂志文章abstract::Trypanosoma congolense is an important pathogen that wreaks havoc in the livestock industry of the African continent. This study evaluated the in vivo antitrypanosomal activity of geranylacetone and its ameliorative effect on the disease-induced anaemia and organ damages as well as its inhibitory effects against trypa...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2019.04.011
更新日期:2019-06-01 00:00:00
abstract::The tick Rhipicephalus microplus is an ectoparasite harmful to livestock, a vector of disease agents that affects meat and milk production. However, resistance to acaricides reflects the need for alternative tick control methods, among which vaccines have gained increasing relevance. In this scenario, monoclonal antib...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2012.02.006
更新日期:2012-04-01 00:00:00
abstract::Early diagnosis and determining the infective stage are critical for effective therapy of toxoplasmosis. Owing to the progress in biotechnology, commonly used native, non-standardized diagnostic antigens should be replaced by genetically engineered antigens. The recombinant proteins are also promising components of su...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2015.01.006
更新日期:2015-03-01 00:00:00
abstract::Considering that the treatment for toxoplasmosis is based on drugs that show limited efficacy due to their substantial side effects, the purpose of the present study was to evaluate the effects of Artemisia annua on in vitro and in vivo Toxoplasma gondii infection. A. annua infusion was prepared from dried herb and te...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2009.04.010
更新日期:2009-07-01 00:00:00
abstract::The water-borne protozoan parasite Cryptosporidium parvum forms oocysts that can persist for long periods of time in the environment, even though the sporozoites inside the oocysts may no longer be viable, making it difficult to assess the associated risk of infection. In this study, we compared the ability of various...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2018.03.002
更新日期:2018-04-01 00:00:00
abstract::The chemical properties of the primary antileishmanial agent sodium stibogluconate (Pentostam), and the interaction of Pentostam with Leishmania mexicana amastigotes, have been investigated with the aid of [125Sb]Pentostam. The molecular weight by P2 chromatography showed [125Sb]Pentostam to be of multiple species of ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(88)90012-4
更新日期:1988-10-01 00:00:00
abstract::The protozoan Trypanosoma evansi is described as presenting high morphological and genetic similarities among the isolates despite its biological heterogeneity and wide geographical distribution. PCR amplification of the internal transcribed spacers of the ribosomal gene in combination with the coding region of the 5....
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2007.10.003
更新日期:2008-03-01 00:00:00
abstract::Balamuthia mandrillaris is a free-living ameba (FLA) that has been isolated or its DNA identified in soil, dust and water. It causes a fatal central nervous system infection in humans and animals. Although it is environmental as Acanthamoeba and Naegleria fowleri, the two other free-living amebae that also cause CNS i...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2015.05.004
更新日期:2015-09-01 00:00:00
abstract::In the present study, we examined the effect of amphotericin B on larval stages (miracidia and primary sporocyst) of the helminth Schistosoma mansoni, the causative agent of human schistosomiasis. Amphotericin B (AmB) is a polyene macrolide that disturbs the function of the cell membrane; it is widely used as prophyla...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2009.12.024
更新日期:2010-06-01 00:00:00
abstract::The largest obstacle impeding the development of an effective malaria vaccine is the incomplete understanding of how the immune response is regulated during infection. B-1a cells, a poorly understood subcategory of B lymphocytes, produce nonpathologic autoantibodies of low affinity which have been shown to have distin...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.2001.4622
更新日期:2001-06-01 00:00:00
abstract::Toll receptors play a critical role in the rapid activation of innate immune responses to a variety of pathogens. In mammals, Toll-like receptors (TLR) have been found in both immune related cells and other cells. At present little is known about the participation of TLR in host defense mechanisms during parasitic inf...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.12.002
更新日期:2012-03-01 00:00:00
abstract::Nitric oxide (NO) has diverse biological functions. Numerous studies have documented NO's biosynthetic pathway in a wide variety of organisms. Little is known, however, about NO production in intraerythrocytic Plasmodium falciparum. Using diaminorhodamine-4-methyl acetoxymethylester (DAR-4M AM), a fluorescent indicato...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2008.04.014
更新日期:2008-09-01 00:00:00
abstract::CBA/J mice are resistant to Leishmania major and susceptible to Leishmania amazonensis. Early events determine infection outcome. Until now, PIV (in vitro priming) immune response to L. amazonensis has not been assessed. Herein, we have shown that compared to L. major, L. amazonensis induced higher parasite burden ass...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2006.01.008
更新日期:2006-07-01 00:00:00
abstract::Chromosome-sized DNA molecules from Trypanosoma cruzi clone Dm 28c were analyzed and compared with other T. cruzi strains and monogenetic trypanosomatids by orthogonal field alteration gel electrophoresis. The results showed that T. cruzi Dm 28c displays at least 18 chromosomes ranging from 550 to more than 1500 kb an...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(89)90178-1
更新日期:1989-08-01 00:00:00
abstract::Three different cell lines (murine macrophages, HeLa and osteosarcoma cells) were assayed in order to check for the manifestation of the cytopathic effects of three strains of Acanthamoeba recently isolated in our laboratory from contact lens cases: CLC-16, CLC-41.r and CLC-51-l. Adhesion and cytotoxicity assays were ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2009.10.011
更新日期:2010-09-01 00:00:00
abstract::In this paper, the lytic activity of two variants of Serratia marcescens against promastigotes of Leishmania braziliensis was studied. In vitro assays showed that S. marcescens variant SM365 lyses L. braziliensis promastigotes, while the variant DB11 did not. Scanning electron microscopy (SEM) revealed that S. marcesc...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2009.03.004
更新日期:2009-06-01 00:00:00
abstract::Hemocytes derived from a strain (13-16-R1) of Biomphalaria glabrata resistant to Schistosoma mansoni were significantly more likely to bind untreated latex beads than hemocytes from the schistosome-susceptible M line strain. Beads preincubated in 13-16-R1 plasma were more readily bound by both 13-16-R1 and M line hemo...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(92)90182-a
更新日期:1992-09-01 00:00:00
abstract::The biochemical properties of the enzyme responsible for nematode "activated L-serine sulphydrase" activity (L-cysteine + R-SH----cysteine thioether + H2S) have been investigated using primarily the gastro-intestinal nematodes Nippostrongylus brasiliensis and Haemonchus contortus. The activated L-serine sulphydrase en...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(92)90048-f
更新日期:1992-03-01 00:00:00
abstract::Leishmaniasis, a neglected tropical disease (NTD) causes major health problems in the tropical and subtropical world. Most of the antileishmanial modern therapies with different formulations of pentavalent antimonials, Miltefosine, Amphotericin B etc. are not satisfactory in recent times due to high toxicity to the ho...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2014.08.009
更新日期:2014-11-01 00:00:00
abstract::Leishmaniasis are globally widespread parasitic diseases which often leads to death if left untreated. Currently available drugs present different drawbacks, so there is an urgent need to develop new, safe and cost-effective drugs against leishmaniasis. In this study we tested a small library of trans-stilbene and ter...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2016.03.007
更新日期:2016-07-01 00:00:00
abstract::Giardia lamblia is a protozoan pathogen with distinct cytoskeletal structures, including median bodies and eight flagella. In this study, we examined components comprising G. lamblia flagella. Crude flagellar extracts were prepared from G. lamblia trophozoites, and analyzed by two-dimensional (2-D) gel electrophoresis...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2013.07.010
更新日期:2013-10-01 00:00:00
abstract::Allelic variation in the Plasmodium falciparum merozoite surface protein 1 (MSP1) gene is expressed as an association of allelic types in variable blocks. In this study, a PCR strategy that can detect 24 different MSP1 association types was used to investigate allelic variation in the MSP1 gene. We identified 236 dist...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.1997.4147
更新日期:1997-05-01 00:00:00
abstract::Aspartic proteases are important virulence factors for pathogens and are recognized as attractive drug targets. Seven aspartic proteases (ASPs) have been identified in Toxoplasma gondii genome. Bioinformatics and phylogenetic analyses regroup them into five monophyletic groups. Among them, TgASP1, a coccidian specific...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.05.003
更新日期:2011-08-01 00:00:00
abstract::Rabbit coccidiosis caused by members of the genus Eimeria can cause enormous economic impact worldwide, but the genetics, epidemiology and biology of these parasites remain poorly understood. In the present study, we sequenced and annotated the complete mitochondrial (mt) genomes of five Eimeria species that commonly ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2015.09.003
更新日期:2015-12-01 00:00:00
abstract::The prevalence of Cryptosporidium and microsporidia in feral horses, which have minimal contact with livestock and humans, is not currently known. We report the findings of a study on Cryptosporidium and microsporidia in 34 Mustangs and 50 Chincoteague ponies in the USA. Fecal samples were screened for presence of Cry...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2015.12.004
更新日期:2016-03-01 00:00:00
abstract::Mature males and females of Schistosoma mansoni were incubated for 24 hr in medium containing [3H]cholesterol. Worms thus labeled were paired for 24 hr with unlabeled partners, in vitro or in vivo by surgical implantation into hamsters. Controls consisted of additional unlabeled worms that did not pair. Scintillation ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(86)90189-x
更新日期:1986-06-01 00:00:00
abstract::Chagas disease, also known as American trypanosomiasis, is a potentially life-threatening illness caused by the protozoan parasite Trypanosoma cruzi, which is transmitted by insects of the family Reduviidae. Since conventional treatments with nitroheterocyclic drugs show serious adverse reactions and have questionable...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2020.107830
更新日期:2020-03-01 00:00:00
abstract::Entomopathogenic nematode Heterorhabditis bacteriophora Az29 and Az36 isolates with different virulence against Popillia unipuncta and soil survival time were isolated from the Azorean archipelago (Portugal) and used for the study. RAPD analysis revealed a very low-level of genetic diversity (GD(axenic Az36 isolate)(a...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.12.001
更新日期:2012-02-01 00:00:00
abstract::Axenic culture of Leishmania is generally performed in rich, serum-supplemented media which sustain robust growth over multiple passages. The use of such undefined media, however, obscures proteomic analyses and confounds the study of metabolism. We have established a simple, defined culture medium that supports the s...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2018.01.009
更新日期:2018-02-01 00:00:00
abstract::Two strains of mice which share identical H-2 genes but differ in their genetic backgrounds were compared for their ability to resist infection with Trichinella spiralis. The two strains of mice, C3HeB/FeJ and AKR/J, share the H-2k haplotype which is associated with susceptibility to primary infection with T. spiralis...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(83)90009-7
更新日期:1983-04-01 00:00:00