Publications by authors named "Juliete L Viana"
In this study, we investigated the microencapsulation of two strains of the entomopathogenic bacteria Bacillus thuringiensis (B. thuringiensis) (BtMA-750 and BtMA-1114), which are biopesticides of high toxicity for the mosquito vector Aedes aegypti. The encapsulation of different concentrations of microorganisms in starch microparticles was evaluated, and the inverse suspension polymerization technique was explored.
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- Bacillus thuringiensis produces important toxins, particularly Cry and Cyt toxins, which are effective in controlling mosquito populations during the sporulation process.
- The study aimed to identify the frequency of the Cyt1Aa gene in various native B. thuringiensis isolates taken from soil, insects, and water samples, examining genetic variations among those isolates.
- Out of 1,448 analyzed strains, only 32 (2.3%) were found to have the cyt1Aa gene, with the highest occurrence (3.4%) found in samples from the Cerrado biome, indicating that the cyt1Aa gene is conserved without any single-base changes in the examined region.
Molecular characterization of the gene profile of Bacillus thuringiensis Berliner isolated from Brazilian ecosystems and showing pathogenic activity against mosquito larvae of medical importance.
Acta Trop
December 2017
The occurrence of Aedes aegypti, Culex quinquefasciatus, and mosquitoes of the genus Anopheles potentiate the spread of several diseases, such as dengue, Zika, chikungunya, urban yellow fever, filariasis, and malaria, a situation currently existing in Brazil and in Latin America. Control of the disease vectors is the most effective tool for containing the transmission of the pathogens causing these diseases, and the bacterium Bacillus thuringiensis var. israelensis has been widely used and has shown efficacy over many years.
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