Navegando por Assunto "Mosquito"

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Acesso aberto (Open Access)
Caracterização antigênica, físico-química e biológica do vírus BE AR 701405, obtido a partir de mosquitos da espécie Psorophora (Jan) ferox, capturados em Altamira – Pará
(Universidade Federal do Pará, 2014-03-26) ARAÚJO, João Batista dos Santos; LEAL, Élcio de Souza; http://lattes.cnpq.br/1158983666415285
The BE AR 701405 virus was isolated from a pool of Psorophora (Jan.) ferox mosquitoes captured in the municipality of Altamira, Para state, Northern Brazil, in 2006. The objective of this study was the physicochemical, biological and antigenic characterization of the BE AR 701405 virus in order to provide data for it taxonomic classification. Newborn mice inoculated by intracerebral route showed evidences of neurological manifestations, such as chill and motor disorders after the infection with the virus BE AR 701405. Cytophatic effect (CPE) was in infected Aedes albopictus C6/36 cells was not clearly observed, however in VERO cells CPE was observed after 48 hors post infection. The virus load was determined in 10-4,1 LD50/ 0.02 mL and the titer after DCE analysis was calculated in 10−2,6 LD50/0,02 mL. The BE AR 701405 virus reacted antigenically with Pixuna virus hiperimmune serum. In conclusion, the studied vírus was sensible to the DCA solvent suggesting that it is an enveloped virus. Furthermore, by serology this virus was identified as a member of the group A, genus Alphavirus, family Togaviridae, more closely related to Pixuna virus. In addition, newborn mice, as well as C6/36 and VERO cells demonstrated to be sensible to the infection by the BE AR 701405 vírus. Further studies are needed to better understand the antigenic relationship between the BE AR 701405 virus and Pixuna virus.
Acesso aberto (Open Access)
Contribuição ao conhecimento da fauna anofélica antropofílica da Praia da Saudade na Ilha de Cotijuba - Belém - Pará: uma área endêmica da malária
(Universidade Federal do Pará, 2004-04-11) GUIMARÃES, Delma Gomes; MASCARENHAS, Bento Melo; http://lattes.cnpq.br/3279744837272788
In spite of its localization near the city of Belém, Pará, Cotijuba Island has been the site of outbreaks of malaria during recent years, especially in the months of April and May. The island is part of an archipelago at the southern margin of Marajó Bay, located 29 km from Belém, as an island portion of the municipality of Belém. The island has a total area of about 60 km² and 20 km of beaches that correspond to about 66% of the total area. Because of the epidemic, it tias become necessary to identify the anopheline species that are the malaria vectors on the island. From 2002 to 2004 periodic collections were made of mosquito larvae and adults, and their breeding sites were located and characterized. Larvae were collected with dippers, while adults were collected manually in individual tubes from human volunteers. Two collections were made of adults in forested areas, one collection during the dry season and the other during the rainy season. Each collection was made during a continuous 24 hour period. Six bi-monthly collections were made near residents' houses, each lasting 6 hours. Both in the forest and near houses, only two species of anophelines were found to bite people, Anopheles (Nyssorhynchus) aquasalis and Anopheles (Anopheles) intennedius. A. aquasalis was more common near houses, whereas A. intermedius was more common in the forest. Most of the island's malaria cases were found to occur two months after the beginning of the rainy season, in the month of May. On all of Cotijuba Island there are four lakes that are possible anopheline breeding sites, and Gabriela Lake is the principal breeding site, responding for 42% of the malaria cases on the island during 2003. Climatic conditions, the resident population's behavior and housing, and the lack of resources for effective vector control, among other factors, favor the continual presence of malaria on Cotijuba Island.
Acesso aberto (Open Access)
Entre Miasmas e o Anopheles: uma breve história da malária no alvorecer da república em Manaus (1898-1904)
(Universidade Federal do Pará, 2021-06) SILVA, Márcio de Carvalho e; BARBOSA, Keith Valéria de Oliveira
The first years of the Republic in Manaus were busy due to significant changes in the city's landscape, such as the construction and levelling of streets and the embankment of creeks. These events were propitiated thanks to the accumulation of capital from the latex trade, to the point where the city became known as the "Paris of the Tropics", given the cosmopolitanism that the city assumed with the rubber economy. At the same time as it expanded as a city, Manaus also saw the expansion of diseases such as malaria, which led to successive epidemics during the Belle Époque. In this article we will address how the disease gained a different visibility in relation to the provincial period, highlighting the reports of health authorities and rulers at the dawn of the Republic in Manaus. For that we will use the technique of discourse analysis in order to verify the changes and permanences in the understanding about the disease between 1898 and 1904. At the same time, we will verify how the recrudescence of the disease in the city brings, in tow, new clashes between Amazonian physicians in relation to the etiology and transmission of the disease, that is, from the idea of the mosquito as a vector in the early years of the twentieth century.
Acesso aberto (Open Access)
Métodos de coletas de mosquitos (Diptera: Culicidae) alternativos ao de atração humana direta
(Universidade Federal do Pará, 2007) VIEIRA, Paoola Cristina Bezerra; GORAYEB, Inocêncio de Souza; http://lattes.cnpq.br/2391620537048479
Some methods capture of mosquitoes already had been developed, demonstrating that it had an evolution of the types of the trap to the long one of the time, however none has shown to be comparable to the direct human attraction (AH). This work had for objective, to test the methods alternative, developed to collect mosquitoes, including the development of new techniques, that can substitute the traditional method of direct human attraction. The study it was developed next to “Parque Ambiental de Belém”, Pará state, Brazil. The used methods were: traps CDC, CDC UV, Shannon, trap developed by Rocha, trap developed by Gorayeb and collect for AH direct. The traps were installed in six points, for six consecutive nights. Were captured 13,099 specimens of Culicidae of seven genera and 27 species, being Anopheles trianulatus the most abundant. The direct human attraction, what it collected greater diversity and abundance of mosquitoes, followed of the Shannon’s trap for abundance and Gorayeb’s trap for diversity.
Acesso aberto (Open Access)
Os mosquitos (Diptera : Culicidae) da Estação Científica Ferreira Penna - ECFPn, Caxiuanã, Melgaço Pará, Brasil: ataque, sazonalidade e estratificação arbórea
(Universidade Federal do Pará, 1996-12-10) ROCHA, José Almir Moraes da; BARATA, José Maria Soares; http://lattes.cnpq.br/5244792275470127; MASCARENHAS, Bento Melo; http://lattes.cnpq.br/3279744837272788
This research was developted in 1995 from February to December, at the Ferreira Penna Research Station, in the municipality of Melgaço, state of Pará, within the Caxiuanã National Forest, with the objective of study the seasonal and daily activities in the forest and anthropic environment and the levels at which various species are found in the forest. The collects were made using human bait and CDC light trap with bird bait in the forest at ground and canopy and human bait in the anthropic environment. The total collection consisted of 1.919 mosquitoes belonging to the genera Aedes Meigen, 1818, Anopheles Meigen, 1818, Haemagogus Williston, 1896, Psorophora Robineau-Desvoidy, 1827, Culex Linnaeus, 1758, Coquillettidia Dyar, 1905, Mansonia Blanchard, 1904, Uranotaenia Lynch-Arribalzaga, 1891, Limatus Theobald, 1901, Phoniomyia Theobald, 1903, Ruchomyia Theobald, 1903, Sabethes Robineau-Desvoidy, 1827, Trichoprosopon Theobald, 1901 e Wyeomyia Theobald, 1901. The predominant species were Culex (Melanoconion) portes! Senevet & Abonnec, 1941 (50,65%), Coquillettídia (Rhynchotaenia) venezuelensis (Theobald, 1912) (9,17%) and Haemagogus (Haemagogus) janthinomys Dyar, 1921 (6,51%). The daily and seasonal activities of mosquitoes species was correlated with temperature, relative humidity and rainfall, using the Spearman correlation, and statistically significant relations were found for some species with these factors. The hypothesis of the significative difference between the species and exemplaries mosquitoes number at ground and canopy was tested using X² test, that was just significant between the exemplaries mosquitoes number at ground and canopy in human bait in the forest.