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. marcescens SM365 adheres to all cellular body and flagellum of the parasite. Several filamentous structures were formed and identified as biofilms. After 120min incubation, they connect the protozoan to the developing bacterial clusters. SEM also demonstrated that bacteria, adhered onto L. braziliensis promastigote surface, formed small filamentous structures which apparently penetrates into the parasite membrane. d-mannose protects L. braziliensis against the S. marcescens SM365 lytic effect in a dose dependent manner. SM365 variant pre cultivated at 37 degrees C did not synthesize prodigiosin although the adherence and lysis of L. braziliensis were similar to the effect observed with bacteria cultivated at 28 degrees C, which produce high concentrations of prodigiosin. Thus, we suggest that prodigiosin is not involved in the lysis of promastigotes and that adherence promoted by bacterial mannose-sensitive (MS) fimbriae is a determinant factor in the lysis of L. braziliensis by S. marcescens SM365.
journal_name
Exp Parasitoljournal_title
Experimental parasitologyauthors
Moraes CS,Seabra SH,Albuquerque-Cunha JM,Castro DP,Genta FA,de Souza W,Brazil RP,Garcia ES,Azambuja Pdoi
10.1016/j.exppara.2009.03.004subject
Has Abstractpub_date
2009-06-01 00:00:00pages
84-90issue
2eissn
0014-4894issn
1090-2449pii
S0014-4894(09)00065-4journal_volume
122pub_type
杂志文章abstract：:Two recombinant barley cystatins, HvCPI5 and HvCPI6, have been tested in vitro against promastigotes and intracellular amastigotes of Leishmania infantum in the J774 monocytic cell line. Toxicity of cystatins for J774 cells was also determined. In addition, a comparison between direct counts of intracellular amastigot...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.08.015
更新日期：2009-12-01 00:00:00
abstract：:A genetically homogeneous population of Plasmodium falciparum prepared by a single erythrocyte micromanipulation technique was used to produce lines of P. falciparum resistant to mefloquine hydrochloride in vitro. Parasites were maintained in a culture medium containing gradually increased concentrations of mefloquine...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(88)90082-3
更新日期：1988-12-01 00:00:00
abstract：:Resistance of human pathogens like Leishmania to drugs is a growing concern where the multidrug-resistant phenotype renders chemotherapy ineffective. The acquired resistance of Leishmania to antimony has promoted intense research on the mechanisms involved but the question has not been resolved yet. In this study we h...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2017.02.019
更新日期：2017-05-01 00:00:00
abstract：:Guinea pig recipients of anti-tick immune serum or immune peritoneal exudate cells expressed 25 and 30% tick rejection, respectively, when challenged with Amblyomma americanum larval ticks. Previous studies have shown that IgG1 antibodies are responsible for the ability of immune serum to transfer resistance to ticks ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(85)90079-7
更新日期：1985-04-01 00:00:00
abstract：:Root lesion nematodes (RLNs, Pratylenchus species) are a group of economically important migratory endoparasitic plant pathogens that attack host roots of major crops such as wheat and sugarcane, and can reduce crop yields by 7-15%. Pratylenchus thornei and Pratylenchus zeae were treated with double stranded RNA (dsRN...
journal_title：Experimental parasitology
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abstract：:The identification of nucleolus organizer regions (NORs) and the qualitative description of silver nitrate staining patterns in spermatogenesis of Paragonimus ohirai are herein reported. The NORs of P. ohirai are located on the short arm of chromosome 4 and are associated with a large amount of constitutive heterochro...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(88)90075-6
更新日期：1988-12-01 00:00:00
abstract：:Experiments were carried out to determine whether there are stage-specific antigens on microfilariae of Brugia pahangi, using sera from Mongolian jirds infected with B. pahangi and monoclonal antibodies against microfilariae of B. pahangi. These studies showed that microfilariae have both stage-specific and nonspecifi...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(86)90130-x
更新日期：1986-02-01 00:00:00
abstract：:In this study, a survey was conducted in order to determine the presence and pathogenic potential of free-living amoebae of Acanthamoeba genus in a population of Barbary Ground squirrels in Fuerteventura Island (Canary Islands, Spain) and Morocco. Identification of Acanthamoeba was based on the morphology of cyst and ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2007.03.014
更新日期：2007-09-01 00:00:00
abstract：:Little is known about the prevalence of Balamuthia mandrillaris amoebae and Balamuthia amoebic encephalitis in Africa. As an approach, relative concentrations of amoebae-binding serum antibodies (Ab) were assessed by flow cytometry using formaldehyde-fixed B. mandrillaris, Acanthamoeba lenticulata 72-2 and Acanthamoeb...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.10.015
更新日期：2010-09-01 00:00:00
abstract：:Okuda, K., Esteva, M., Segura, E. L., and Bijovsky, A. T. 1999. The cytostome of Trypanosoma cruzi epimastigotes is associated with the flagellar complex. Experimental Parasitology 92, 223-231. Proliferative forms of Trypanosoma cruzi, amastigotes and epimastigotes, have a cytostome, a specialized structure formed by ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.1999.4419
更新日期：1999-08-01 00:00:00
abstract：:In this work, an ecto-phosphatase activity of Entamoeba histolytica was characterized using intact cells. This activity presented the following biochemical characteristics: (i) it hydrolyzes p-NPP with V(max) of 8.00+/-0.22 nmol p-NP x h(-1) x 10(-5) cells and K(m) of 2.68+/-0.25 mM; (ii) it is inhibited by acid phosp...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2006.09.019
更新日期：2007-04-01 00:00:00
abstract：:The present study aimed to evaluate the acaricidal efficacy of fluazuron (2.5 mg/kg), administered as a pour-on, in comparison to an injectable formulation containing fluazuron (1.6 mg/kg) + ivermectin (0.63 mg/kg), against Rhipicephalus (Boophilus) microplus in naturally and experimentally infested cattle. Two studie...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2015.02.004
更新日期：2015-06-01 00:00:00
abstract：:Antimony unresponsiveness in mucocutaneous and visceral leishmaniasis is a serious clinical problem. Information on the mechanisms and characteristics of drug resistance in parasites that suggest chemotherapeutic strategies to overcome resistance is of practical importance. We developed nine lines of Leishmania resist...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(89)90173-2
更新日期：1989-07-01 00:00:00
abstract：:Parasitic castration in the snail-trematode relationship can be understood as any change in the reproductive function of the snail that is due to interference by the developing larvae inside the snail that leads to the reduction or complete disruption of egg-laying activity. This study was designed to observe the para...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2013.03.020
更新日期：2013-06-01 00:00:00
abstract：:Three clones of Entamoeba histolytica (L-6, C93, C919) were isolated by mutagenesis with ethyl methanesulfonate from the axenic strain HM1:IMSS and were studied for adherence, cytolytic, and soluble galactose inhibitable lectin activity. Avirulent clones adhered to and killed fewer Chinese hamster ovary cells than HM1...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(87)90157-3
更新日期：1987-04-01 00:00:00
abstract：:Proteasomes are multi-subunit proteases involved in several mechanisms and thought to contribute to the regulation of cellular homeostasis. Here, we report for the first time biochemical evidence for the existence of a ubiquitin-proteasome proteolytic pathway in this parasite. Proteasomes from both cercariae and adult...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2005.01.002
更新日期：2005-04-01 00:00:00
abstract：:The differential effect of fox and pig bile and its corresponding low molecular weight fraction (LMW) was investigated on the in vitro invasion of MDCK-AA7 epithelial cell monolayers by Trichinella spiralis muscle larvae. Seven invasion experiments were performed and a total of 274 cell monolayers were examined. Fox a...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2010.05.013
更新日期：2010-12-01 00:00:00
abstract：:Nitazoxanide (NTZ) is a broad-spectrum anti-parasitic drug used against a wide variety of protozoans and helminthes. Albendazole, its active metabolite albendazole sulfoxide (ABZSO), is one of the drugs of choice to treat both intestinal and tissue helminth and protozoan infections. However little is known regarding t...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2016.10.012
更新日期：2016-12-01 00:00:00
abstract：:Chagas disease is characterized by cardiac lesions and a high level of PGE2. Our objective was to investigate the role of PGE2 in cardiac lesions. BALB/c mice were infected with Trypanosoma cruzi (1x10(3) trypomastigote forms) and were treated daily with PBS, meloxicam (0.5 mg/kg) or etoricoxib (0.6 mg/kg). The animal...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2007.11.003
更新日期：2008-04-01 00:00:00
abstract：:We show that a purified preparation of the prominent tartrate-resistant acid phosphatase (E.C.3.1.3.2), isolated from the external surface of the intracellular parasite Leishmania donovani (promastigote form), inhibits toxic oxidative metabolite production of neutrophils. Preincubation of a neutrophil suspension (2.5 ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(85)90039-6
更新日期：1985-12-01 00:00:00
abstract：:The sphingolipids biosynthesis pathway generates bioactive molecules crucial to the regulation of physiological processes. We have recently reported that DAG (diacylglycerol) generated during sphingomyelin synthesis, plays an important role in PKC (protein kinase C) activation, necessary for the transit through the ce...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.02.011
更新日期：2009-06-01 00:00:00
abstract：:Two different diets for the host and three drug dosage regimens were used to select lines resistant to sulfadoxine and pyrimethamine from the parent strain of the rodent malaria parasite Plasmodium berghei [the N (K173) strain]. A higher yield of resistance was obtained when a high parasitemia was present at the begin...
journal_title：Experimental parasitology
pub_type： 杂志文章
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更新日期：1983-06-01 00:00:00
abstract：:The goal of this study was to compare two parasitological diagnostic techniques, such as by Micro-Haematocrit Centrifugation Technique (MHCT) and Direct Microscopic Examination (DME) with a serological method (iELISA), and a molecular procedure PCR, in rabbits experimentally infected with Trypanosoma evansi, in order ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2011.02.010
更新日期：2011-05-01 00:00:00
abstract：:Spent mushroom compost (SMC) is a residue generated in edible mushrooms production, such as Hypsizygus marmoreus. Its genome was recently sequenced, demonstrating cuticle-degrading protease genes. The present work aims to investigate the proteases from H. marmoreus spent mushroom compost (SMC) by verifying its action ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2018.12.006
更新日期：2019-02-01 00:00:00
abstract：:Clonorchis sinensis is a fish-borne trematode endemic to East Asia, which infects over 35 million people globally. In the study described here, we developed a nested polymerase chain reaction (PCR) method for the specific and reliable detection of C. sinensis. The primers designed from the nucleotide sequence data der...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2006.09.010
更新日期：2007-03-01 00:00:00
abstract：:Chagas disease is a tropical and systemic disease caused by the parasite Trypanosoma cruzi. This parasite has been divided into six Discrete Typing Units (DTU's) due to its high genetic diversity. T. cruzi I (TcI) is the most prevalent DTU in Colombia and recently associated to cardiomyopathies. The aim of this study ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2012.09.017
更新日期：2012-12-01 00:00:00
abstract：:A ceramide-anchored glycophosphosphingolipid antigen was isolated from the lipid extract of Leishmania donovani promastigotes. The affinity-purified glycolipid antigen contained galactose, mannose, myo-inositol, phosphate, ceramide, and hexosamine but no sialic acid. The phosphate group was present internally at the c...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(92)90148-4
更新日期：1992-05-01 00:00:00
abstract：:Polymerase chain reaction amplification of several polymorphic genes has been used to study the population biology of Plasmodium falciparum. S antigen is particularly suitable for such studies, but difficulties in the amplification of this gene have precluded its use. Here we describe a simple method for the amplifica...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.1993.1108
更新日期：1993-12-01 00:00:00
abstract：:This report describes a molecular method for determining in a first step the generic composition of a nematode community and in a second step, the resistance of each species to benzimidazole (BZ). We first established a polymerase chain reaction (PCR) linked to a restriction fragment length polymorphism strategy using...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.2000.4542
更新日期：2000-08-01 00:00:00
abstract：:Members of the zinc-regulated transporter/iron-regulated transporter-like protein (ZIP) family of proteins transport metal ions across cell membranes. Genes encoding ZIPs are present in the genomes of schistosomes. Here, we describe molecular characterisation of six ZIPs (SjZIPA-F) from Schistosoma japonicum. Quantita...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2011.01.002
更新日期：2011-04-01 00:00:00
