St Louis Encephalitis
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. Molecular detection of flaviviruses and alphaviruses in mosquitoes (Diptera: Culicidae) from coastal ecosystems in the Colombian Caribbean
Arboviruses belonging to the genera Flavivirus and Alphavirus were detected in mosquitoes in a rural area of San Bernardo del Viento (Córdoba, Colombia). A total of 22,180 mosquitoes were collected, sorted into 2,102 pools, and tested by generic/nested reverse transcription-polymerase chain reaction. Venezuelan equine encephalitis virus, dengue virus, West
Mem. Inst. Oswaldo Cruz. Publicado em: 03/10/2016
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2. Production and diagnostic application of recombinant domain III of West Nile envelope protein in Brazil
INTRODUCTION: West Nile virus (WNV) is a flavivirus with a natural cycle involving mosquitoes and birds. Over the last 11 years, WNV has spread throughout the Americas with the imminent risk of its introduction in Brazil. METHODS: Envelope protein domain III of WNV (rDIII) was bacterially expressed and purified. An enzyme-linked immunosorbent assay with WNV
Rev. Soc. Bras. Med. Trop.. Publicado em: 2013-01
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3. Serological detection of St. Louis encephalitis virus and West Nile virus in equines from Santa Fe, Argentina
St. Louis encephalitis virus (SLEV) and West Nile virus (WNV) present ecological and antigenic similarities and are responsible for serious human diseases. In addition, WNV is a significant pathogen in terms of equine health. The purpose of our study was to analyse the seroprevalence of SLEV and WNV in equine sera collected in Santa Fe Province, Argentina. T
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-06
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4. Seroconversion for west Nile and St. Louis encephalitis viruses among sentinel horses in Colombia
We prospectively sampled flavivirus-naïve horses in northern Colombia to detect West Nile virus (WNV) and St. Louis encephalitis virus (SLEV) seroconversion events, which would indicate the current circulation of these viruses. Overall, 331 (34.1%) of the 971 horses screened were positive for past infection with flaviviruses upon initial sampling in July 20
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-12
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5. Neutralising antibodies for West Nile virus in horses from Brazilian Pantanal
Despite evidence of West Nile virus (WNV) activity in Colombia, Venezuela and Argentina, this virus has not been reported in most South American countries. In February 2009, we commenced an investigation for WNV in mosquitoes, horses and caimans from the Pantanal, Central-West Brazil. The sera of 168 horses and 30 caimans were initially tested using a flaviv
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-06
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6. Vigilância de epizootias em primatas não humanos (PNH) como instrumento de monitoramento de arboviroses e outras viroses de interesse em saúde pública
Epizootics in wild animals can be considered important public health indicators, besides little used in epidemiological surveillance. Evaluation of non human primates (NHP), like ?sentinels animals?, was realized through this study in Porto Rico County region, upper Paraná River, including Paraná and Mato Grosso do Sul States, Brazil, between June/04 and A
Publicado em: 2007
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7. Genetic characterization of St. Louis encephalitis virus isolated from human in São Paulo, Brazil
The molecular characterization of SPH253157, a new strain of St. Louis encephalitis virus (SLEV), isolated in 2004 from the first case of human infection recognized in the state of São Paulo, Brazil, is reported. The patient, presenting a febrile illness without neurological involvement, was hospitalized as a probable case of dengue fever. Genomic RNA was i
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-02
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8. Cross-Protection Between Group B Arboviruses: Resistance in Mice to Japanese B Encephalitis and St. Louis Encephalitis Viruses Induced by Dengue Virus Immunization
Albino Swiss mice, immunized with any of several types and strains of dengue viruses, were afforded substantial protection against peripheral Japanese B encephalitis or St. Louis encephalitis virus challenge. Dengue-2 (New Guinea “C”)-immunized mice showed, 10 and 20 weeks after immunization, undiminished resistance with concomitant cyclophosphamide trea
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9. Influence of Sex and Age on Natural Resistance to St. Louis Encephalitis Virus Infection in Mice
A difference was observed in susceptibility of adult male and female mice to St. Louis encephalitis (SLE) virus as measured by the death rate after intravenous challenge. Female mice that had susceptibility similar to that of males at 2 months of age had increased resistance to SLE virus at 3 and 4 months of age. The increased resistance occurred after sexua
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10. Brainstem encephalitis with serological evidence of St Louis encephalitis.
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11. Delayed-type hypersensitivity responses in mice infected with St. Louis encephalitis virus: kinetics of the response and effects of immunoregulatory agents.
Labeled monocyte infiltration techniques have been used to study delayed-type hypersensitivity responses in mice immunized with St. Louis encephalitis virus. A delayed 24- to 48-h inflammatory response occurred 6 to 7 days after immunization. This response can be potentiated by cyclophosphamide treatment, by BCG administration, or by splenectomy. Treatments
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12. Enhancement of St. Louis Arbovirus Plaque Formation by Neutral Red
Experiments with St. Louis encephalitis (SLE) virus have shown that neutral red enhances the plaque size in duck embryo cell cultures. This may represent a new method for genetic studies of SLE virus population. In a mosquito pool specimen NR+ and NR− particles were demonstrated. By intracerebral passage in mice, there is a selection of NR+ particles. Simi