Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 13 de 13
Filtrar
Mais filtros








Base de dados
Intervalo de ano de publicação
1.
Am J Trop Med Hyg ; 40(1): 94-101, 1989 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-2916731

RESUMO

Colorado tick fever (CTF) virus, family Reoviridae, genus Orbivirus, contains 12 genes distinguishable by polyacrylamide gel electrophoresis (PAGE). Multiple genotypes of CTF virus were isolated at 3 field sites in Colorado in 1985. Five genotypes were found at Campos Cabin, 2 at Drake, and 6 at Rocky Mountain National Park. Virus isolations were made in 1985 from 6 patients with CTF. These isolates were distinct from each other and the field isolates. Although the CTF isolates were different by PAGE profile, the majority of the 12 genes were highly conserved among the 1985 isolates and a Florio isolate (FMA). Only genes 4 and 6 were variant among the 1985 CTF isolates and FMA, and no unique genes were identified. In 1986, a follow-up field survey was done at the Campos Cabin site. Of the 3 CTF PAGE genotypes obtained, 2 exhibited PAGE profiles which were different from the 1985 isolates. One isolate may have resulted from the reassortment of genes from 2 of the isolates circulating at Campos Cabin in 1985.


Assuntos
Vírus da Febre do Carrapato do Colorado/genética , Genes Virais , RNA de Cadeia Dupla/genética , RNA Viral/genética , Reoviridae/genética , Animais , Colorado , Febre do Carrapato do Colorado/microbiologia , Vírus da Febre do Carrapato do Colorado/isolamento & purificação , Vírus da Febre do Carrapato do Colorado/fisiologia , Dermacentor/microbiologia , Eletroforese em Gel de Ágar , Eletroforese em Gel de Poliacrilamida , Feminino , Genótipo , Humanos , Masculino , Hibridização de Ácido Nucleico , RNA de Cadeia Dupla/análise , RNA Viral/análise , Sciuridae/microbiologia
3.
Am J Trop Med Hyg ; 30(1): 224-9, 1981 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-6259958

RESUMO

One hundred and twenty-four small mammals of six species were inoculated with three strains of Colorado tick fever (CTF) virus to define viremia and neutralizing (N) antibody responses. Adult Eutamias minimus and Eutamias embrinus, and juvenile Peromyscus maniculatus and Spermophilus lateralis, were highly susceptible to development of viremic infection. Adult S. lateralis and P. maniculatus were moderately susceptible (greater than or equal to 50% viremic). Five Sylvilagus nuttalli did not become viremic following experimental inoculation. Spermophilus richardsoni was also relatively resistant (less than or equal to 50% viremic). The longest duration of viremia (mean 15.8 days) and highest peak viremia levels (mean peak titer 10(3.9 plaque-forming units per ml) occurred in E. minimus. Adult E. umbrinus, juvenile S. lateralis, and juvenile P. maniculatus had moderate viremias. Adult S. lateralis and S. richardsoni often had short viremias during which virus was only intermittently detectable. N antibody production was most rapid in E. minimus in comparison with other species. In addition, N antibody persisted for 1 year in this species. In other species, many animals lost detectable antibody 5-11 months after infection. No significant differences were found in patterns of infection between three CTF virus strains. We conclude that of the six species inoculated, E. minimus is the best experimental host for CTF virus.


Assuntos
Febre do Carrapato do Colorado/veterinária , Infecções por Reoviridae/veterinária , Doenças dos Roedores/microbiologia , Roedores/microbiologia , Animais , Formação de Anticorpos , Febre do Carrapato do Colorado/imunologia , Febre do Carrapato do Colorado/microbiologia , Vírus da Febre do Carrapato do Colorado/isolamento & purificação , Doenças dos Roedores/imunologia
10.
J Virol ; 3(6): 631-2, 1969 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-5798247

RESUMO

Two strains of Colorado tick fever virus grew in Singh's Aedes albopictus cells. In one of three experiments, virus growth continued for 7 weeks.


Assuntos
Arbovírus/isolamento & purificação , Cultura de Vírus , Aedes , Animais , Febre do Carrapato do Colorado/microbiologia , Técnicas de Cultura , Métodos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA