Publications by authors named "Valeria Mourao de Moura"

Scorpion envenomations are a major public health problem in Brazil, and most medically important cases are attributable to the Tityus genus. The objective of this study is to describe the clinical and epidemiological aspects of a series of 151 cases of confirmed scorpion stings, which were treated at the hospitals of two cities in the Western Brazilian Amazon, between June 2014 and December 2019. This study shows that the genus Tityus was the most prevalent.

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Article Synopsis
  • * The study investigated whether antibodies against Potamotrygon motoro venom could neutralize its harmful effects using protocols on mice, including seroneutralization and vaccination.
  • * Results showed that neither protocol fully neutralized the venom’s effects, but vaccination with stinger extract did prevent systemic muscle damage, and different immune responses were triggered depending on the method used.
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Ethnopharmacological Relevance: In the region of Western Pará, Amazonia, Brazil, Philodendron megalophyllum is widely used for the treatment of envenomations caused by bites from venomous snakes. The traditional use of plants is usually done through oral administration of an infusion (decoction) soon after the bite occurs. The efficiency of aqueous extracts of P.

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Snake venoms are complex mixtures of proteins with toxic activities, with many distinct isoforms, affecting different physiological targets, comprised in a few protein families. It is currently accepted that this diversity in venom composition is an adaptive advantage for venom efficacy on a wide range of prey. However, on the other side, variability on isoforms expression has implications in the clinics of human victims of snakebites and in the efficacy of antivenoms.

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Snake venom composition shows significant inter- and intra-species variation. In the case of the viperid species , responsible for the majority of snakebites in the Amazon region, geographical and ontogenetic variables affect venom composition, with ecological and medical implications. Previous studies had shown that venom from neonate and juvenile specimens have a higher coagulant activity.

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Article Synopsis
  • Micrurus snakes, or coral snakes, account for a small percentage (0.4%) of snakebite incidents in Brazil, with a report detailing an envenoming case involving Micrurus averyi, also known as the black-headed coral snake, being the first documented case for this species.
  • The patient experienced severe local pain, paresthesia, and significant swelling (edema) from the bite site, along with symptoms like nausea and drooling upon admission.
  • After receiving 100 mL of coral snake antivenom and pain relief treatment, the patient was released 48 hours later in good condition, though the localized swelling observed was more severe than typically reported in other Micrurus bite cases in Brazil
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Ethnopharmacological Importance: The effectiveness of aqueous extract of Bellucia dichotoma Cogn. (Melastomataceae) specimems collected in Santarém, PA, against some biological activities of Bothrops atrox venom (BaV) has been scientifically proven. Here, we analyzed the components and assessed the anti-snakebite potential of aqueous extracts of bark of B.

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Ethnopharmacological Relevance: Ethnobotanical studies have shown that Plathymenia reticulata Benth. (Fabaceae) has been widely used in cases of snake envenomation, particularly in Northern Brazil. In light of this, the aim of this study was to evaluate the inhibitory potential of the condensed-tannin-rich fraction obtained from the bark of P.

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Ethnopharmacological Relevance: The plant species Connarus favosus is used in folk medicine in the west of Pará state, Brazil, to treat snakebites.

Aim Of The Study: To investigate the potential of the aqueous extract of Connarus favosus (AECf) to inhibit hemorrhagic and phospholipase A2 activities induced by Bothrops atrox venom (BaV) and to determine the antioxidant and antimicrobial potentials of the extract.

Materials And Methods: AECf was analyzed phytochemically for phenolics (condensed tannins and hydrolyzable tannins) by colorimetry.

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Ethnopharmacological Relevance: The poor distribution and limited availability of antivenoms in Brazil have led to greater use of plants to treat snakebites. Very often such plants are the only alternative available to riverside communities.

Materials And Methods: Direct questionnaire-based interviews were conducted with members of the Cucurunã, São Pedro and Alter do Chão communities in Santarém, Pará, Brazil.

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Bellucia dichotoma Cogn. (Melastomataceae) is one of various plant species used in folk medicine in the west of the state of Pará, Brazil, to treat snake bites. Many studies have been carried out to evaluate the effectiveness of anti-snake bite plants, but few of these use the same preparation methods and doses as those traditionally used by the local populations.

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