2017-10-302017-10-302014FERREIRA, Deimy Lima. Detecção de vírus Influenza A em aves migratórias capturadas em regiões litorâneas dos estados da Bahia, Pará e Pernambuco. 2014. 72 f. Dissertação (Mestrado) – Universidade Federal do Pará, Núcleo de Medicina Tropical, Belém, 2012. Programa de Pós-Graduação em Doenças Tropicais.https://repositorio.ufpa.br/handle/2011/9203The Influenza virus is known for its ability to infect a wide variety of animals, such as mammals (humans, pigs, horses, whales), domestic birds (chicken [Gallus gallus], goose, turkey [Meleagris ocellata]) beyond wild birds of the orders Anseriformes (duck, wild goose and swan) and Charadriiformes (seagulls, swallows, aquatic birds and sandpipers) these being its natural host. Comprehend the movement of long distance migratory wild birds is crucial to explain the movement of avian influenza viruses. This event causes movement of the birds are acting as an important means of spreading the virus along a migratory route, a fact widely accepted. During the period 2006 and 2007, samples were collected 2,252 samples from a variety of bird species captured in locations which are part of the Atlantic migration route and Mississippi, in the states of Bahia, Para and Pernambuco for epidemiological surveillance of West Nile virus and influenza. The objective of this study was to investigate the circulation of influenza virus among migratory birds that use the routes that pass the above states. For this, the samples were analyzed by means of molecular biological techniques, which comprised two main steps: a) extraction of DNA / RNA from the biological specimen; b) amplification of the gene encoding cytochrome oxidase control of by the technical Polymerase Chain Reaction (PCR) and amplification of the vRNA by Real time Reverse Transcripition polimerase chain reaction (RT-qPCR). The results obtained showed that the total samples tested, 7.2% (n = 158) were positive by RT-qPCR for Influenza A virus. We observed a difference in positivity for the virus among bird species analyzed, which is 3.58% for Charadriformes order, 26.3% among the birds of the order Anseriformes, 5.3% of birds belonging to the order Pelecaniformes and 10.9% for those order Suliformes. Among the samples of the orders Passeriformes and Columbiformes, no sample was positive for Influenza Virus. The data suggest variation among the sampling sites, and the state of Para with the lowest percentage of positivity, the second highest rate with Bahia and Pernambuco finally presenting higher prevalence of absolute value. This study shows that although rare investigations in Brazilian territory, there has been movement of Influenza A viruses among several species of migratory birds that utilize the states of Para, Bahia and Pernambuco as stopping places and reproduction of their species. These findings justify further investigations to understand the dynamics of avian influenza viruses circulating in the population of wild birds in Brazil, and its role as a potential source of infection for other animals, including humans.Acesso AbertoVirologiaBiologia molecularVírus InfluenzaInfluenza aviáriaGripe aviáriaDissertaçãoCNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA::VIROLOGIACNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA::BIOLOGIA MOLECULAR