31 documents found, page 1 of 4
Diversity and spatio-temporal variation of Anopheles (Diptera: Culicidae) befor...
Ferreira,Francisco Augusto da Silva; Costa,Fábio Medeiros da; Lima,Gervilane Ribeiro de; Roque,Rosemary Aparecida; Ferreira,Vania da CostaABSTRACT The objective of this study was to evaluate the effect of the construction of the Jirau hydroelectric plant on the anopheline species, in Porto Velho, Rondônia, Brazil. For this, sampling was carried out in 23 locations in the pre (2004) and 23 after construction (2018) phases in the hydroelectric dam's coverage area, performed by human landing catch between 6:00 pm and 10:00 pm. We found 14 anopheline...
Do climate changes alter the distribution and transmission of malaria? Evidence...
Cella,Wilsandrei; Baia-da-Silva,Djane Clarys; Melo,Gisely Cardoso de; Tadei,Wanderli Pedro; Sampaio,Vanderson de Souza; Pimenta,PauloAbstract 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 atmo...
Isolation and molecular characterization of Bacillus thuringiensis found in soi...
Lobo,Katiane dos Santos; Soares-da-Silva,Joelma; Silva,Maria Cleoneide da; Tadei,Wanderli Pedro; Polanczyk,Ricardo AntonioABSTRACT This study investigated the potential of Bacillus thuringiensis isolates obtained in the Cerrado region of the Brazilian state of Maranhão for the biological control of Aedes aegypti larvae. The isolates were obtained from soil samples and the identification of the B. thuringiensis colonies was based on morphological characteristics. Bioassays were run to assess the pathogenicity and toxicity of the di...
Characterization of artificial larval habitats of Anopheles darlingi (Diptera: ...
Arcos,Adriano Nobre; Ferreira,Francisco Augusto da Silva; Cunha,Hillândia Brandão da; Tadei,Wanderli PedroABSTRACT Mosquitoes belonging to the Anopheles genus are of great relevance in the epidemiology and transmission of malaria, with their larval phase developing in clean waters in the presence of organic matter. However, the human presence in the Amazon has increasingly influenced the emergence of new breeding sites and larval habitats, such as clay pits, fish ponds and dams, among others. The objective of the s...
Oviposition of Aedes aegypti Linnaeus, 1762 and Aedes albopictus Skuse, 1894 (D...
Silva,William Ribeiro da; Soares-da-Silva,Joelma; Ferreira,Francisco Augusto da Silva; Rodrigues,Iléa Brandão; Tadei,Wanderli PedroABSTRACT The aim of this study was to analyze the effectiveness of different control agents of Aedes aegypti and Aedes albopictus associated with ovitraps under laboratory and field conditions. Five treatments were used: grass infusion + Bacillus thuringiensis israelensis (gI + Bti), grass infusion + Saccharopolyspora spinosa (gI + Ss), grass infusion + Pyriproxyfen (gI + P), distilled water + Toxorhynchites ha...
Isolation of Bacillus thuringiensis from the state of Amazonas, in Brazil, and ...
Soares-da-Silva,Joelma; Pinheiro,Valéria Cristina Soares; Litaiff-Abreu,Eleilza; Polanczyk,Ricardo Antonio; Tadei,Wanderli PedroWe investigated the use of Bacillus thuringiensis isolated in the state of Amazonas, in Brazil, for the biological control of the dengue vector Aedes aegypti. From 25 soil samples collected in nine municipalities, 484 bacterial colonies were obtained, 57 (11.78%) of which were identified as B. thuringiensis. Six isolates, IBt-03, IBt-06, IBt-07, IBt-28, IBt-30, and BtAM-27 showed insecticidal activity, and only...
Effect of Bacillus sphaericus Neide on Anopheles (Diptera: Culicidae) and assoc...
Ferreira,Francisco Augusto da Silva; Arcos,Adriano Nobre; Sampaio,Raquel Telles de Moreira; Rodrigues,Ilea Brandão; Tadei,Wanderli PedroABSTRACTWe analyzed the effects of Bacillus sphaericus on Anopheles larvae and on the associated insect fauna in fish farming ponds. Five breeding sites in the peri-urban area of the city of Manaus, AM, Brazil, were studied. Seven samples were collected from each breeding site and B. sphaericus was applied and reapplied after 15 days. The samples were made at 24 h before application, 24 h post-application and 5...
Ecoepidemiology and biology of Eratyrus mucronatus Stål, 1859 (Hemiptera: Reduv...
Monte,Gersonval Leandro Silva; Tadei,Wanderli Pedro; Farias,Thaysa MarinhoIntroduction Eratyrus mucronatus Stål, 1859 is a wild triatomine vector of Trypanosoma cruzi Chagas, 1909. However, little is known regarding the biology and ecoepidemiology of this triatomine in the Brazilian Amazon. The present study describes the biology of E. mucronatus grown under laboratory conditions and the epidemiological aspects of its natural breeding sites. Methods Five colonies were monitored in th...
Evaluation of larvicidal activity and brine shrimp toxicity of rhizome extracts...
Bucker,Augusto; Falcao-Bucker,Nadia Cristina; Nunez,Cecilia Veronica; Pinheiro,Carlos Cleomir de Souza; Tadei,Wanderli PedroIntroduction In this study, we used dichloromethane (DCM) and methanol (MeOH) extracts of the Zingiber zerumbet rhizome to evaluate brine shrimp lethality and larvicidal activity on Aedes aegypti and Anopheles nuneztovari mosquitoes. Methods Bioassays were performed by exposing third-instar larvae of each mosquito species to the DCM or MeOH extracts. Results Probit analysis with DCM and MeOH extracts demonstrat...
Larvicidal effects of endophytic and basidiomycete fungus extracts on Aedes and...
Bucker,Augusto; Bucker,Nadia Cristina Falcao; Souza,Antonia Queiroz Lima de; Gama,Auricelia Matos da; Rodrigues-Filho,Edson; Costa,Fabio Medeiros daIntroduction In vitro bioassays were performed to access the larvicidal activity of crude extracts from the endophytic fungus Pestalotiopsis virgulata (Melanconiales, Amphisphaeriaceae) and the saprophytic fungus Pycnoporus sanguineus (Basidiomycetes, Polyporaceae) against the mosquitoes Aedes aegypti and Anopheles nuneztovari. Methods The extracts were tested at concentrations of 100, 200, 300, 400 and 500ppm....