Trophozoites
Mostrando 1-12 de 365 artigos, teses e dissertações.
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1. Evaluation of triterpenes derivatives in the viability of Leishmania amazonensis and Trichomonas vaginalis
Trichomonas vaginalis and Leishmania spp. are protozoal species responsible for millions of cases of parasitic diseases worldwide. Considering the potential of natural products and the need for more effective and less toxic alternatives to treat trichomoniasis and leishmaniasis, this study aimed to evaluate the effect of two series of triterpenes derivatives
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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2. A simple, ex vivo phagocytosis assay of Plasmodium vivax merozoites by flow cytometry
As phagocytosis is the first line of defense against malaria, we developed a phagocytosis assay with Plasmodium vivax (P. vivax) merozoites that can be applied to evaluate vaccine candidates. Briefly, after leukocyte removal with loosely packed cellulose powder in a syringe, P. vivax trophozoites matured to the merozoite-rich schizont stages in the presence
Mem. Inst. Oswaldo Cruz. Publicado em: 07/10/2019
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3. Fatal parasite-induced enteritis and typhlocolitis in horses in Southern Brazil
Resumo Doenças relacionadas ao sistema alimentar são as principais causas de morte em equinos. Esse estudo teve o objetivo de descrever aspectos patológicos de enterites e tiflocolites parasitárias fatais por ciatostomíneos, Eimeria leuckarti, Balantidium coli e Strongyloides westeri, em equinos. Foi revisado o banco de dados de lesões intestinais para
Rev. Bras. Parasitol. Vet.. Publicado em: 01/08/2019
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4. Meningoencephalitis due to Naegleria fowleri in cattle in southern Brazil
Resumo Naegleria fowleri é uma ameba de vida livre, comumente encontrada no meio ambiente, principalmente em água doce e no solo. Este protozoário é ocasionalmente associado a casos fatais de doença do sistema nervoso central em seres humanos e espécies animais. No presente trabalho, um caso de meningoencefalite por Naegleria fowleri em um bovino na re
Rev. Bras. Parasitol. Vet.. Publicado em: 06/06/2019
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5. Gastrointestinal parasites of a population of emus (Dromaius novaehollandiae) in Brazil
Resumo Emus são aves grandes que não voam pertencentes ao grupo das ratitas e são originários da Austrália. Desde meados da década de 1980, aumentou o interesse pela criação de emus em cativeiro para a produção de couro, carne e óleo. O objetivo deste estudo foi identificar parasitas gastrointestinais nas fezes de emus Dromaius novaehollandiae de
Braz. J. Biol.. Publicado em: 20/05/2019
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6. Occurrence of gastrointestinal parasites in wild animals in State of Paraná, Brazil
ABSTRACT The objective of this study was to determine the prevalence and diversity of gastrointestinal parasites in fecal samples from wild birds and mammals from the State of Paraná. In total, 220 stool samples were sent to Parasitic Diseases Laboratory of the Federal University of Paraná during 13 months (Jan/2013-Jan/2014). A total of 52.7% (116/220) of
An. Acad. Bras. Ciênc.. Publicado em: 11/01/2018
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7. Morphologic study of the effect of iron on pseudocyst formation in Trichomonas vaginalis and its interaction with human epithelial cells
BACKGROUND Trichomonas vaginalis is the aetiological agent of human trichomoniasis, which is one of the most prevalent sexually transmitted diseases in humans. Iron is an important element for the survival of this parasite and the colonisation of the host urogenital tract. OBJECTIVES In this study, we investigated the effects of iron on parasite prolifera
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-10
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8. Evaluation of Giardia duodenalis viability after metronidazole treatment by flow cytometry
Giardia duodenalis (syn. lamblia; syn. intestinalis) susceptibility testing is not routinely performed because the classical culture methods are very time-consuming and laborious. We developed a novel flow cytometry (FC) assay to evaluate the susceptibility of G. duodenalis trophozoites to metronidazole (MTZ). Different concentrations of MTZ were added to cu
Mem. Inst. Oswaldo Cruz. Publicado em: 21/11/2014
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9. Laboratory diagnosis of amebiasis in a sample of students from southeastern Brazil and a comparison of microscopy with enzyme-linked immunosorbent assay for screening of infections with Entamoeba sp.
Introduction: Epidemiological studies on amebiasis have been reassessed since Entamoeba histolytica and E. dispar were first recognized as distinct species. Because the morphological similarity of these species renders microscopic diagnosis unreliable, additional tools are required to discriminate between Entamoeba species. The objectives of our study were
Rev. Soc. Bras. Med. Trop.. Publicado em: 2014-01
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10. Identification of an immunogenic protein of Giardia lamblia using monoclonal antibodies generated from infected mice
The humoral immune response plays an important role in the clearance of Giardia lamblia. However, our knowledge about the specific antigens of G. lamblia that induce a protective immune response is limited. The purpose of this study was to identify and characterise the immunogenic proteins of G. lamblia in a mouse model. We generated monoclonal antibodies (m
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-08
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11. Drimanes from Drimys brasiliensis with leishmanicidal and antimalarial activity
This paper evaluates CHCl3 and CH3OH extracts of the stem bark, branches and leaves of Drimys brasiliensis and drimane sesquiterpenes isolated from the stem bark against strains of Leishmania amazonensis and Leishmania braziliensis promastigotes and Plasmodium falciparum trophozoites. All of the extracts and compounds were tested in cell lines in comparison
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-04
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12. Stool sample storage conditions for the preservation of Giardia intestinalis DNA
Stool is chemically complex and the extraction of DNA from stool samples is extremely difficult. Haemoglobin breakdown products, such as bilirubin, bile acids and mineral ions, that are present in the stool samples, can inhibit DNA amplification and cause molecular assays to produce false-negative results. Therefore, stool storage conditions are highly impor
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-12