Results 41 to 50 of about 3,086 (183)

Genetic structure and kdr mutations in Aedes aegypti populations along a road crossing the Amazon Forest in Amapá State, Brazil

Scientific Reports, 2023
Insecticide resistance in Aedes aegypti poses a significant threat to disease control. One form of resistance, caused by kdr mutations in the Na V gene, hinders vector control efforts in Brazil.
Barbara S. Souza, Leticia F. Lima, Allan K. R. Galardo, Vincent Corbel, Jose Bento P. Lima, Ademir J. Martins   +5 more
doaj   +1 more source

Rapidly declining seagrass meadows in Brazil: Findings from satellite imagery and local knowledge

People and Nature, Volume 8, Issue 5, Page 1155-1171, May 2026.
Abstract Due to the limitations of individual monitoring approaches, integrating social perceptions with multiple advanced technologies provides a new opportunity to gain a comprehensive understanding of ecosystem degradation. We combined historical aerial mapping, satellite imagery, semi‐structured interviews with local stakeholders, and a bilingual ...
Karine Matos Magalhães, Emma Deeks, Aline da Silva Cerqueira, Gabriel Henrique Ferreira Silva, Fabiana Aguiar Santos, Terry Dawson, Pavel Kratina   +6 more
wiley   +1 more source

Insecticide Resistance and Fitness: The Case of Four Aedes aegypti Populations from Different Brazilian Regions

BioMed Research International, Volume 2018, Issue 1, 2018., 2018
Background. Chemical control is still a major strategy to constrain vector density and mitigate pathogen transmission. However, insecticide overuse poses a high selective pressure, favouring the spread of resistance alleles in natural populations. In an insecticide‐free environment, a fitness cost is expected in resistant insects when compared to ...
Mariana Rocha David, Gabriela Azambuja Garcia, Denise Valle, Rafael Maciel-de-Freitas, Franck Remoue   +4 more
wiley   +1 more source

The impact of Wolbachia infection on the rate of vertical transmission of dengue virus in Brazilian Aedes aegypti

Parasites & Vectors, 2017
Background Wolbachia pipientis is a common endosymbiotic bacterium of arthropods that strongly inhibits dengue virus (DENV) infection and transmission in the primary vector, the mosquito Aedes aegypti. For that reason, Wolbachia-infected Ae.
Etiene Casagrande Pacidônio, Eric Pearce Caragata, Debora Magalhães Alves, João Trindade Marques, Luciano Andrade Moreira   +4 more
doaj   +1 more source

Glycosomal Phosphoenolpyruvate Carboxykinase CRISPR/Cas9‐Deletion and Its Role in Trypanosoma cruzi Metacyclogenesis and Infectivity in Mammalian Host

The FASEB Journal, Volume 40, Issue 6, 31 March 2026.
Effects of PEPCK deficiency in Trypanosoma cruzi bioenergetics and life stages. ABSTRACT Trypanosoma cruzi, the causative agent of Chagas disease, possesses glycosomes—unique organelles that house key metabolic enzymes, several of which are promising therapeutic targets.
Carolina S. D. Vieira, Wei Wang, Fernando Sanchez‐Valdez, Jihyun Lim, Brooke E. White, Camilla G. S. Souza, Rick L. Tarleton, Marcia C. Paes, Natalia P. A. Nogueira   +8 more
wiley   +1 more source

Assessment of Synthetic Membranes for Artificial Blood Feeding of Culicidae

Insects, 2020
Potential pathogen transmission through hematophagy in Culicidae is a major public-health problem, and several studies have been performed to better understand this phenomenon.
Luciana S. Dias, Jonatas C. Caldeira, Luiz G. S. R. Bauzer, José B. P. Lima   +3 more
doaj   +1 more source

ZIKV Phylogenetic Characterization Reveals Evolutionary Diversity, Regional Dissemination, and Emergence of African Lineages in Brazil

Journal of Basic Microbiology, Volume 66, Issue 1, January 2026.
ABSTRACT During the last epidemic in 2015–2016, Zika virus (ZIKV) gaining worldwide attention due to its association with neurological complications such as microcephaly and Guillain‐Barré syndrome. ZIKV can be transmitted through vector‐borne, sexual, maternal‐fetal, and blood transfusion transmission.
Thayane da Encarnação Sá‐Guimarães, Pedro Panzenhagen, Anita Ferreira do Valle, Carlos Adam Conte Junior, Mônica Ferreira Moreira   +4 more
wiley   +1 more source

Bioecologia de Dermatobia hominis (Linnaeus Jr., 1781) em Palotina, Paraná, Brasil

Ciência Rural, 2002
O presente trabalho foi desenvolvido na UFPR - Campus Palotina, no Paraná, e em três propriedades rurais do mesmo município, durante o período de novembro de 1997 a maio de 1999.
Pinto Simone Benghi, Soccol Vanete Thomaz, Vendruscolo Eliane, Rochadelli Roberto, Ribeiro Paulo Bretanha, Freitag Alaércio, Henemann Carlos, Uemura Márcio   +7 more
doaj  

Distribution and dissemination of the Val1016Ile and Phe1534Cys Kdr mutations in Aedes aegypti Brazilian natural populations

Parasites & Vectors, 2014
Background The chemical control of the mosquito Aedes aegypti, the major vector of dengue, is being seriously threatened due to the development of pyrethroid resistance. Substitutions in the 1016 and 1534 sites of the voltage gated sodium channel (AaNaV),
Jutta Gerlinde Birggitt Linss, Luiz Paulo Brito, Gabriela Azambuja Garcia, Alejandra Saori Araki, Rafaela Vieira Bruno, José Bento Pereira Lima, Denise Valle, Ademir Jesus Martins   +7 more
doaj   +1 more source

Injective mappings and solvable vector fields

Anais da Academia Brasileira de Ciências, 2010
We establish a sufficient condition for injectivity in a class of mappings defined on open connected subsets of Rn , for arbitrary n. The result relates solvability of the appropriate vector fields with injectivity of the mapping and extends a result ...
José R. dos Santos Filho, Joaquim Tavares   +1 more
doaj   +1 more source