A5085683024- Trypanosoma species research and implications
- Insect Pest Control Strategies
- Research on Leishmaniasis Studies
- Insect and Pesticide Research
- Insect symbiosis and bacterial influences
- Advanced X-ray Imaging Techniques
- Insect-Plant Interactions and Control
- Advanced Electron Microscopy Techniques and Applications
- Insect Utilization and Effects
- Phytochemical compounds biological activities
- Essential Oils and Antimicrobial Activity
- Insect Resistance and Genetics
- Allelopathy and phytotoxic interactions
- Insect behavior and control techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Plant and animal studies
- Invertebrate Immune Response Mechanisms
- Insect and Arachnid Ecology and Behavior
- Forensic Entomology and Diptera Studies
- Neurobiology and Insect Physiology Research
- Plant Parasitism and Resistance
- Biochemical and Molecular Research
- CRISPR and Genetic Engineering
- Healthcare and Venom Research
- Advanced X-ray and CT Imaging
Universidade Federal Fluminense
2014-2024
Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular
2013-2024
Universidade Federal do Rio de Janeiro
1995-2024
Federico Santa María Technical University
2022
Instituto Biológico
2022
National Council for Scientific and Technological Development
2012-2021
Emergent Space Technologies (United States)
2012
Universidad Autónoma de Nuevo León
2010
Fundação Oswaldo Cruz
1989-1999
Trypanosoma cruzi in order to complete its development the digestive tract of Rhodnius prolixus needs overcome immune reactions and microbiota trypanolytic activity gut. We demonstrate that R. following infection with epimastigotes clone Dm28c and, comparison uninfected control insects, midgut contained (i) fewer bacteria, (ii) higher parasite numbers, (iii) reduced nitrite nitrate production increased phenoloxidase antibacterial activities. In addition, insects pre-treated antibiotic then...
Plants have been recognized as a good source of insecticidal agents, since they are able to produce their own defensives insect attack. Moreover, there is growing concern worldwide develop pesticides with low impact environment and non-target organisms. Hexane-soluble fraction from ethanolic crude extract fruits Manilkara subsericea its triterpenes were considered active against cotton pest (Dysdercus peruvianus). Several natural products activity poor water solubility, including...
Triatomines, which are the vectors of Trypanosoma cruzi, have been considered to be exclusive blood feeders for more than 100 years, since discovery Chagas disease. We offered artificial sugar meals laboratory model-insect Rhodnius prolixus, is a strict haematophagous insect. registered feeding by adding colorant meals. To assess putative phytophagy, fruits tomato Solanum lycopersicum were R. prolixus and presence DNA was assessed in insects using PCR. also longevity, urine production...
Background TcSMUG L products were recently identified as novel mucin-type glycoconjugates restricted to the surface of insect-dwelling epimastigote forms Trypanosoma cruzi, etiological agent Chagas disease. The remarkable conservation their predicted mature N-terminal region, which is exposed extracellular milieu, suggests that may be involved in structural and/or functional aspects interaction with insect vector. Methodology and Principal Findings Here, we investigated putative roles mucins...
Argon is a flight-ready sensor suite with two visual cameras, flash LIDAR, an on- board flight computer, and associated electronics. was designed to provide sensing capabilities for relative navigation during proximity, rendezvous, docking operations between spacecraft. A rigorous ground test campaign assessed the performance capability of measure pose high-fidelity satellite mock-ups variety simulated rendezvous proximity maneuvers facilitated by robot manipulators in lighting conditions...
SUMMARY Heparin-binding proteins (HBPs) have been demonstrated in both infective forms of Trypanosoma cruzi and are involved the recognition invasion mammalian cells. In this study, we evaluated potential biological function these during parasite-vector interaction. HBPs, with molecular masses 65·8 kDa 59 kDa, were isolated from epimastigotes by heparin affinity chromatography identified biotin-conjugated sulfated glycosaminoglycans (GAGs). Surface plasmon resonance biosensor analysis stable...
Myrciaria floribunda (H. West ex Willd.) O. Berg, Myrtaceae, is popularly known as "camboim-amarelo" and was collected at Restinga de Jurubatiba (RJ, Brazil). Leaves from this species were submitted to hydrodistillation extract its essential oil. Monoterpenes the main compounds found (53.9%), 1,8-cineole major constituent (38.4%). Studies carried out evaluate effects of oil on development two agricultural pests (Oncopeltus fasciatus Dysdercus peruvianus). The considered effective against D....
Antivenom therapy is the only specific treatment for snakebite envenomation, and antivenom potency determination key in efficacy assurance quality control process. Nowadays, this process relies on vivo murine model — thus, development of alternative vitro methods imperative. In current study, principle proposed method ability Bothrops venom to induce cytotoxic effects Vero cells, capacity evaluate inhibition cytotoxicity by respective antivenom. After exposure venom/antivenom, relative...
The vector of Chagas' disease, Rhodnius prolixus, feeds exclusively on blood. blood meals are slowly digested, and these insects wait some weeks before the next meal. During life an insect, energy-requiring processes such as moulting, adult gonadal reproductive growth, vitellogenesis, muscular activity, fasting, lead to increased metabolism. Carbohydrates a major source energy their mobilization is important. We determined amounts glycogen, trehalose, glucose present in fat body and/or...
Abstract BACKGROUND: Studies were carried out to evaluate the effects of Manilkara subsericea extracts and triterpenes on development two species agricultural pest insects, Oncopelus fasciatus Dysdercus peruvianus . RESULTS: All treatments insects with M. induced mortality, delayed inhibited moulting. Some assayed (FH, FB FD in D. , FH, FEA O. ) also produced body deformities few adults that emerged. Other FEA, FB, LET both insects), however, either permanent (overaged) or extranumerary...
The main strategy of interrupting Trypanossoma cruzi transmission is to control the vector populations. Studies new agents with activity against these vectors have a priority interest. This study evaluated insecticidal essential oil Myrciaria floribunda nymphs R. prolixus. M. was collected in Jurubatiba Sandbank (southeastern Brazil). Leaves were extracted by hydrodistillation and analyzed mass spectrometry flame ionization gas chromatography. pure at various dilutions or purified...
The ED50 for moulting inhibition by injected azadirachtin A is fourth instar larvae of all the triatomines, Triatoma vitticepes, T. pseudomaculata, maculata, brasiliensis, lecticularis, matogrossensis, infestans, Rhodnius prolixus. R. neglectus, robustus, Panstrongylus megistus, and P. herrera in range 10-25 ng/larva. In prolixus, survival cruzi was studied after treatment with drug. If trypomastigotes were fed presence 1.0 microgram A/ml blood, number parasites decreased near to limit...
Bioassays against fifth-instar nymphae of Rhodnius prolixus were conducted with essential oil Pilocarpus spicatus extracted by hydrodistillation. The main results may be summarized as follows: (i) high levels toxicity and paralysis together discrete moulting inhibition caused topical application either 0.5 µL or 1.0 per insect the crude oil; (ii) partial fagoinhibition, inhibition, prolonged intermoulting period number paralyzed insects, but no observed after oral treatment using 5 10...
Essential oils are known for their insect control potential, which is mainly attributed to the presence of terpenes that interfere with hormonal and physiological processes arthropods. The aim present study was evaluate effects essential oil from leaves Eugenia sulcata Spring ex Mart., Myrtaceae, on development two species agricultural pest insects, Dysdercus peruvianus Oncopeltus fasciatus. Results showed induced mortality, reduced numbers adults. Topical treatment fasciatus using pure...