208 documents found, page 1 of 21

Efficiency of oviposition traps with biolarvicides for monitoring Aedes aegypti...

This study verified the efficiency of ovitraps combined with Saccharopolyspora spinosa and Bacillus thuringiensis israelensis for monitoring Aedes aegypti and Aedes albopictus in laboratory and field conditions. In the laboratory, for A. aegypti, there was no difference in eggs number between treatments and grass infusions. For A. albopictus, the average of eggs was higher in the grass infusion. In the dry seas...

Identification techniques and culture media for the growth of Bacillus thuringi...

Bacillus thuringiensis (Bt) is a bacterium of worldwide interest, due to its high toxicity to a wide range of insect vectors of pathogens to humans and agricultural pests. The insecticidal action of Bt is conferred by the presence of protein crystals, which act as toxins. Several studies are carried out in order to select Bt strains from different ecosystems with mosquitocidal action for vector insects. It is o...

Antimicrobial and cytotoxic activity of fungal mycelial extracts from aquatic e...

Fungi are a prolific source of biologically active metabolites, including a wide range of clinically important drugs. Therefore, this study aims to evaluate the antimicrobial and cytotoxic activity of secondary metabolites extracted from fungal mycelia isolated from freshwater samples in the state of Amazonas. Mycelial extracts from 12 fungal were used, extracted with MeOH/AcOEt (1:1) according to the criteria ...

Screening of plants found in the State of Amazonas, Brazil for activity against...

Made available in DSpace on 2021-07-14T10:41:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2004. Added 1 bitstream(s) on 2021-07-14T11:36:07Z : No. of bitstreams: 1 S0044-59672004000100012.pdf: 277183 bytes, checksum: 7e7a8289dcd98d1df6c2879e5159ad69 (MD5); Extratos aquosos, etanólicos e metanólicos, representando principalmente espécies vegetais nativas encontradas na região Amazônica, foram preparados,...

Culturable bacteria associated with Anopheles darlingi and their paratransgenes...

Made available in DSpace on 2021-06-25T10:20:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-12-01; Uppsala Universitet; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Vetenskapsrådet; Background: Malaria remains a major public health problem in South America, mostly in the Amazon region. Among newly proposed ways of controlling malaria transmission to humans, paratransgenesis is...

Genetic variability among Anopheles species belonging to the Nyssorhynchus and ...

Biology of Amazonian Mosquitos. IX. On chromossome polymorphism of Anopheles (N...

Sobre o Polimorfismo Cromossômico de Anopheles darlingi Root (Diptera, Culicidae)

Do climate changes alter the distribution and transmission of malaria? Evidence...

Malaria, a mosquito-borne infectious disease, is considered a significant global health burden. Climate changes or different weather conditions may impact infectious diseases, specifically those transmitted by insect vectors and contaminated water. Based on the current predictions for climate change associated with the increase in carbon dioxide concentrations in the atmosphere and the increase in atmospheric t...

Frequency, diversity, and productivity study on the Aedes aegypti most preferre...

The most preferred containers by Aedes aegypti were studied April and July (rainy and dry periods) in two Manaus neighbourhoods. In all, 2,700 premises and 13,912 containers were examined, most (87%) recorded outdoors. Out of the 13,100 inspected premises, only 1.6% showed to be positive for Aedes aegypti, summing up to 7,916 collected samples. Most frequently found containers outdoors in either neighbourhood r...