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Total 35 results found since Jan 2013.

Carrion decomposition and assemblage of necrophagous dipterans associated with Terbufos (Organophosphate) intoxicated rat carcasses.
Abstract Organophosphate use represents one of the main causes of intentional and accidental poisoning in Brazil. Because they induce alteration in carcass decomposition and succession of necrophagous Diptera, they are important investigative tool in forensic entomology for determining the postmortem interval (PMI) and cause of death. Thus, this work aimed to evaluate the influence of Terbufos, the most commonly used organophosphate for suicides in Rio Grande do Norte, Brazil, in the decomposition process and necrophagous fly assemblies in intoxicated rat carcasses. For this, 150g female Wistar rats received, by g...
Source: Acta Tropica - August 4, 2020 Category: Infectious Diseases Authors: Jales JT, Barbosa TM, Dos Santos LC, Rachetti VPS, Gama RA Tags: Acta Trop Source Type: research

Differential Ability of Necrophagous Diptera to Colonize Concealed Resources: Empirical Evidence From a Field Experiment in Brazil.
Abstract Field studies in forensic entomology seem to assume that a cadaver is a resource equally accessible to flies, irrespective of the species' size, behavior, and sensorial capacity. We aimed to challenge this assumption by experimentally manipulating baited traps in order to test whether the accessibility to decomposing baits is related to the following: (i) the diversity of necrophagous dipterans; (ii) the body size of adults; and (iii) the female sexual maturity stage. The experiment was performed in a rainforest fragment in Northeastern Brazil, in an area characterized by high levels of homicides. Traps b...
Source: Journal of Forensic Sciences - April 20, 2020 Category: Forensic Medicine Authors: Barbosa TM, Jales JT, Vasconcelos SD, Gama RA Tags: J Forensic Sci Source Type: research

ZikaPLAN: addressing the knowledge gaps and working towards a research preparedness network in the Americas.
Authors: Wilder-Smith A, Preet R, Brickley EB, Ximenes RAA, Miranda-Filho DB, Turchi Martelli CM, Araújo TVB, Montarroyos UR, Moreira ME, Turchi MD, Solomon T, Jacobs BC, Villamizar CP, Osorio L, de Filipps AMB, Neyts J, Kaptein S, Huits R, Ariën KK, Willison HJ, Edgar JM, Barnett SC, Peeling R, Boeras D, Guzman MG, de Silva AM, Falconar AK, Romero-Vivas C, Gaunt MW, Sette A, Weiskopf D, Lambrechts L, Dolk H, Morris JK, Orioli IM, O'Reilly KM, Yakob L, Rocklöv J, Soares C, Ferreira MLB, Franca RFO, Precioso AR, Logan J, Lang T, Jamieson N, Massad E Abstract Zika Preparedness Latin American Network (ZikaPLAN) is ...
Source: Global Health Action - October 24, 2019 Category: International Medicine & Public Health Tags: Glob Health Action Source Type: research

Let Plants be Thy Medicine – You Are What You Eat
Credit: Busani Bafana/IPSBy Esther Ngumbi and Ifeanyi NsoforILLINOIS, United States / ABUJA, Oct 16 2019 (IPS) United Nations World Food Day is celebrated around the world on October 16 under the theme: “Our Actions ARE Our Future. Healthy Diets for a Zero Hunger World”. This theme is timely, especially, because across Africa and around the world, there has been a gradual rise in malnutrition and diet-related non communicable diseases, as highlighted in The Lancet study and a United Nations Report published earlier this year. While 45 percent of deaths in children are from nutrition-related causes, mainly malnu...
Source: IPS Inter Press Service - Health - October 16, 2019 Category: International Medicine & Public Health Authors: Esther Ngumbi and Ifeanyi Nsofor Tags: Food & Agriculture Global Headlines Health World Food Day Source Type: news

Plant Bugs Predators (Hemiptera: Heteroptera: Miridae) with References to Arthropods and Fungi in Brazil.
This study aims to increase the knowledge of the relationships among plant bugs, prey and fungi and emphasize those species with potential for biological control strategies and pest integrated management. PMID: 31411260 [PubMed - in process]
Source: An Acad Bras Cienc - August 11, 2019 Category: Science Authors: Nogueira BCF, Ferreira PSF, Coelho LA, Martins DS, Barcellos BD Tags: An Acad Bras Cienc Source Type: research

The Transcriptome of the Salivary Glands of Amblyomma aureolatum Reveals the Antimicrobial Peptide Microplusin as an Important Factor for the Tick Protection Against Rickettsia rickettsii Infection
Conclusion In conclusion, our data show that R. rickettsii exerts a modulatory effect on the transcriptional profile the SG of A. aureolatum. Moreover, RNAi experiments demonstrated that the knockdown of one microplusin increases the susceptibility of ticks to infection, suggesting that this is one important factor for the control of R. rickettsii. The functional characterization of the additional CDSs modulated by infection is warranted and might reveal other factors that interfere with the acquisition and/or transmission of this tick-borne pathogen. Ethics Statement All procedures involving vertebrate animals were car...
Source: Frontiers in Physiology - May 2, 2019 Category: Physiology Source Type: research

Characterization of α-Glucosidases From Lutzomyia longipalpis Reveals Independent Hydrolysis Systems for Plant or Blood Sugars
In this report, the authors consider that transglycosylation might be an adaptation for the obtention of monosaccharides from sucrose without the increase in osmolarity, as a simple hydrolytic reaction of a 0.7 M sucrose solution (phloem concentration) might result in osmotic shock for the midgut epithelial cells. In this respect, L. longipalpis enzymes might have the same biochemical adaptation. It would be very interesting to observe if this is a common trait of α-glucosidase from insects feeding on nectar or phloem sap, and verify if this is a case of evolutionary divergence or convergence. Two main mechanisms o...
Source: Frontiers in Physiology - April 9, 2019 Category: Physiology Source Type: research

Current vector control challenges in the fight against malaria in Brazil
Abstract In Brazil, malaria is an important public health problem first reported in 1560. Historically, fluctuations in malaria cases in Brazil are attributed to waves of economic development; construction of railroads, highways, and hydroelectric dams; and population displacement and land occupation policies. Vector control measures have been widely used with an important role in reducing malaria cases. In this review article, we reviewed the vector control measures established in the Brazilian territory and aspects associated with such measures for malaria. Although some vector control measures are routinely used in Braz...
Source: Revista da Sociedade Brasileira de Medicina Tropical - March 8, 2019 Category: Tropical Medicine Source Type: research

Microorganisms in the ticks Amblyomma dissimile Koch 1844 and Amblyomma rotundatum Koch 1844 collected from snakes in Brazil
The objective of this study was to investigate tick infestations on snakes (Reptilia: Squamata: Serpentes) arriving at the serpentarium at the Institute Vital Brazil, Rio de Janeiro. Some of the identified ticks were individually tested for the presence of bacteria of the generaRickettsia (Rickettsiales: Rickettsiaceae),Borrelia (Spirochaetales: Spirochaetaceae),Coxiella (Legionellales: Coxiellaceae),Bartonella (Rhizobiales: Bartonellaceae),Ehrlichia (Rickettsiales: Anaplasmataceae),Anaplasma (Rickettsiales: Anaplasmataceae), and Apicomplexa protozoa of the generaBabesia (Piroplasmida: Babesiidae) andHepatozoon (Eucoccidio...
Source: Medical and Veterinary Entomology - November 28, 2018 Category: Veterinary Research Authors: M. Ogrzewalska, C. Machado, T. Rozental, D. Forneas, L. E. Cunha, E. R. S. de Lemos Tags: Original Article Source Type: research

Pyrethroid and organophosphate pesticide resistance in field populations of horn fly in Brazil
Medical and Veterinary Entomology, EarlyView.
Source: Medical and Veterinary Entomology - August 20, 2018 Category: Veterinary Research Authors: L. G. Brito , F. S. Barbieri , R. B. Rocha , A. P. L. Santos , R. R. Silva , E. S. Ribeiro , F. Guerrero , L. Foil , M. C. S. Oliveira Source Type: research

Occurrences of triatomines (Hemiptera: Reduviidae) and first reports of Panstrongylus geniculatus in urban environments in the city of Sao Paulo, Brazil.
Abstract This note reports on occurrences of triatomine species in the city of Sao Paulo, Brazil, registered between 1988 and 2017. Records of triatomines captured in Sao Paulo are based on specimens received spontaneously from Health Surveillance Centers, Health Centers and Zoonosis Control Centers in the city as well as from citizens. Species were identified morphologically at the Public Health Entomology Laboratory, Faculty of Public Health, University of Sao Paulo, where the triatomines, which are vectors of Chagas disease, were tested for Trypanosoma cruzi infection. The first reported occurrence of triatomin...
Source: Revista do Instituto de Medicina Tropical de Sao Paulo - July 19, 2018 Category: Tropical Medicine Authors: Ceretti-Junior W, Vendrami DP, Matos-Junior MO, Rimoldi-Ribeiro A, Alvarez JV, Marques S, Duarte AN, Silva RAD, Rosa JAD, Marrelli MT Tags: Rev Inst Med Trop Sao Paulo Source Type: research

Molecular bloodmeal analyses reveal that Trypanosoma cruzi ‐infected, native triatomine bugs often feed on humans in houses in central Brazil
Medical and Veterinary Entomology, EarlyView.
Source: Medical and Veterinary Entomology - July 13, 2018 Category: Veterinary Research Authors: T. T. C. Minuzzi ‐Souza , L. R. Silva , L. Hagström , M. Hecht , N. Nitz , R. Gurgel‐Gonçalves Source Type: research

Diversity of rickettsiae and potential vectors of spotted fever in an area of epidemiological interest in the Cerrado biome, midwestern Brazil
Medical and Veterinary Entomology, EarlyView.
Source: Medical and Veterinary Entomology - July 3, 2018 Category: Veterinary Research Authors: I. B. Machado , K. Bitencourth , K. M. Cardoso , S. V. Oliveira , M. Santalucia , S. F. F. Marques , M. Amorim , G. S. Gaz ÊTa Source Type: research

Identification of stable fly attractant compounds in vinasse, a byproduct of sugarcane –ethanol distillation
Abstract The stable fly, Stomoxys calcitrans (Diptera: Muscidae), is a worldwide pest of livestock. Recent outbreaks of stable flies in sugarcane fields in Brazil have become a serious problem for livestock producers. Larvae and pupae found inside sugarcane stems after harvesting may indicate that stable flies use these stems as potential oviposition or larval development sites. Field observations suggest that outbreaks of stable flies are associated with the vinasse and filter cake derived from biomass distillation in sugarcane ethanol production that are used as fertilizers in sugarcane fields. Adult stable flies are att...
Source: Medical and Veterinary Entomology - August 21, 2017 Category: Veterinary Research Authors: N. S. JELVEZ SERRA, H. F. GOULART, M. F. TRIANA, S. DOS SANTOS TAVARES, C. I. M. ALMEIDA, J. G. DA COSTA, A. E. G. SANTANA, J. J. ZHU Tags: Original Article Source Type: research

Molecular detection of Wolbachia pipientis in natural populations of sandfly vectors of Leishmania infantum in endemic areas: first detection in Lutzomyia longipalpis
Abstract A polymerase chain reaction‐based method was used to screen sandflies for infection with Wolbachia (Rickettsiales: Rickettsiaceae), an intracellular bacterial endosymbiont found in many arthropods and filarial hosts. Positive results were obtained in five of 200 field‐collected sandflies and were confirmed by sequencing. All sandflies were Lutzomyia longipalpis (Diptera: Psychodidae) captured in a region endemic for visceral leishmaniasis in Brazil. This is the first study to identify Wolbachia infection in this Lutzomyia species, which is the main vector of leishmaniasis in the study area. The low infection r...
Source: Medical and Veterinary Entomology - August 11, 2017 Category: Veterinary Research Authors: N. O. DA ROCHA, S. M. LAMBERT, A. G. DIAS ‐LIMA, F. S. JULIÃO, B. M. P. S. SOUZA Tags: Short Communication Source Type: research