Tatiana Regina Vieira

Antileishmanial and Antitoxoplasmal Activities of Acetone-Derived Monoketone Curcuminoids

Yan Robles, Tatiana Regina Vieira, Waleed S. Koko, Ismail Daoud et autres

Background/Objectives: Leishmaniasis and toxoplasmosis are zoonoses that cause millions of deaths annually. This study aimed to synthesize and investigate the in vitro antileishmanial and antitoxoplasmal activity of eight ace-tone-derived monoketone curcuminoids (MKCs). Methods: MKCs 1-8 were synthesized using a base-catalyzed Claisen-Schmidt condensation. …

br, sa, mn (code pays fourni par la source)

In vitro antischistosomal activity of 2-aroyl-benzofuran derivatives against Schistosoma mansoni

Tatiana Regina Vieira, Herbert Júnior Dias, Daiane Albino dos Santos, Lizandra Guidi Magalhães et autres

Five 2-aroylbenzofuranes were synthesized by condensation between α-bromoacetone and an ortho-hydroxybenzaldehyde or ortho-hydroxy-acetophenone and evaluated for their in vitro antischistomal effects against adult Schistosoma mansoni worms. Below 200 µg/mL, none of the tested 2-aroylbenzofurans killed adult S. mansoni worms. On the other …

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In vitro evaluation of the antiparasitic activity of p-coumaric acid prenylated derivatives

Tatiana Regina Vieira, Julia Grassi Barco, Lucas Antônio de Lima Paula, Paulo Félix et autres

We have evaluated eight p-coumaric acid prenylated derivatives in vitro for their antileishmanial activity against Leishmania amazonensis promastigotes and their antischistosomal activity against Schistosoma mansoni adult worms. Compound 7 (methyl 3,5-diprenyl-4-prenyloxycinnamate) was the most active against L. amazonensis (IC50 = 45.92 µM) …

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In vitro and in silico studies of prenylated phenylpropanoids of green propolis and their derivatives against cariogenic bacteria

Tatiana Regina Vieira, Anna Lívia Oliveira Santos, Sara Souza, Ismail Daoud et autres

Artepillin C, drupanin, and plicatin B are prenylated phenylpanoids naturally occurring in Brazilian green propolis. In this study, these compounds and eleven derivatives were synthesized and evaluated for their in vitro antimicrobial activity against a representative panel of cariogenic bacteria in terms …

br, gb, Algérie, sa, Tunisie (code pays fourni par la source)

Genotypic identification and antimicrobial susceptibility profiles of coagulase-negative staphylococci isolated from sheep’s milk

Cristiane Rosa Moraes, Tatiana Regina Vieira, Amanda Oliveira, Graciela Völz Lopes et autres

Mastitis affect milk production and dairy products in sheep farming. Its main etiological agents are coagulase-negative staphylococci (CoNS). Identification based on DNA sequencing is considered the gold-standard method for these organisms. The present study identify CoNS species from 32 sheep’s milk isolates …

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Comparative resistome, mobilome, and microbial composition of retail chicken originated from conventional, organic, and antibiotic-free production systems

Tatiana Regina Vieira, Esther F. Cavinatto de Oliveira, Samuel Paulo Cibulski, Núbia Michelle Vieira da Silva et autres

The aim of this study was to investigate the microbial composition, and the profiles of antimicrobial resistance genes (resistome) and mobile genetic elements (mobilome) of retail chicken carcasses originated from conventional intensive production systems (CO), certified antimicrobial-free intensive production systems (AF), and …

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Caracterização físico-química e botânica do mel de abelhas sem ferrão (Meliponini), de ocorrência no Vale do Taquari – RS, objetivando edição de RTIQ

Tatiana Regina Vieira, Caroline Savi Noguez, Mauricio Ayres dos Santos, Saionara Araújo Wagner

O Rio Grande do Sul não possui um Regulamento Técnico de Identidade e Qualidade (RTIQ) para o mel de Abelhas Sem Ferrão (ASF), assim sendo, a comercialização desse alimento ocorre informalmente e sem inspeção higiênico-sanitária que garanta sua inocuidade alimentar. Sendo assim, …

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Antimicrobial Resistance Profile of Bacteria Isolated from Canine and Feline Samples at the Preventive Veterinary Laboratory of the Federal University of Rio Grande do Sul (UFRGS) - Brazil

Tatiana Regina Vieira, Karoline Zenatto, Gustavo Enck Sambrano, Marisa Ribeiro de Itapema Cardoso

Background: Antimicrobial resistance (AMR) is a major global health threat. In small animals such as dogs and cats, antimicrobials are most commonly prescribed for skin and genitourinary diseases; therefore, the AMR of bacteria involved in these infections should be monitored. In addition, …

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Antimicrobial resistance profiles in Escherichia coli isolated from whole-chicken carcasses from conventional, antibiotic-free, and organic rearing systems

Tatiana Regina Vieira, Esther F. Cavinatto de Oliveira, Samuel Paulo Cibulski, Mauro Riegert Borba

Antimicrobial resistance (AMR) is a growing concern in human and animal health. Public discussions on these issues have contributed to an increased demand for antibiotic-free food. Studies comparing the antimicrobial resistance profiles of bacteria in foodstuffs originating from farming systems with restrictions …

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Perception of poultry veterinarians on the use of antimicrobials and antimicrobial resistance in egg production

Mariana Costa Torres, Tatiana Regina Vieira, Marisa R.I. Cardoso, Franciele Maboni Siqueira et autres

This study aimed to describe the perception of veterinarians who work with commercial laying hens in the state of Rio Grande do Sul, Brazil, regarding the use of antibiotics and their possible impacts on animal, human, and environmental health. A descriptive epidemiological …

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Ação antihelmíntica de closantel em caprinos criados em sistema extensivo no Rio Grande do Sul

Danielle Sassi de Souza, Tatiana Regina Vieira, Adriano Bruzza, Elder Joel Coelho Lopes et autres

ResumoA verminose é uma das doenças de origem sanitária que mais causa prejuízos frequentes aos produtores de caprinos e o controle das nematodioses tem sido realizado, predominantemente, com o uso de antihelmínticos.O objetivo do estudo foi determinar o tempo necessário entre a …

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Perfil de resistência em Escherichia coli isoladas de carcaças de frango provenientes de sistemas de produção convencional, livre de antibióticos e orgânico

Tatiana Regina Vieira, Esther Ferrazza Cavinatto de Oliveira, Samuel Paulo Cibulski, Mauro Riegert Borba et autres

A resistência antimicrobiana (AMR) é uma preocupação crescente para a saúde humana e animal. A discussão pública dessas questões tem contribuído para o aumento da demanda por alimentos produzidos sem o uso de antibióticos. No entanto, estudos que comparem os perfis de …