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| Galler,R.; Marchevsky,R.S.; Caride,E.; Almeida,L.F.C.; Yamamura,A.M.Y.; Jabor,A.V.; Motta,M.C.A.; Bonaldo,M.C.; Coutinho,E.S.F.; Freire,M.S.. |
| A chimeric yellow fever (YF)-dengue serotype 2 (dengue 2) virus was constructed by replacing the premembrane and envelope genes of the YF 17D virus with those from dengue 2 virus strains of Southeast Asian genotype. The virus grew to high titers in Vero cells and, after passage 2, was used for immunogenicity and attenuation studies in rhesus monkeys. Subcutaneous immunization of naive rhesus monkeys with the 17D-D2 chimeric virus induced a neutralizing antibody response associated with the protection of 6 of 7 monkeys against viremia by wild-type dengue 2 virus. Neutralizing antibody titers to dengue 2 were significantly lower in YF-immune animals than in YF-naive monkeys and protection against challenge with wild-type dengue 2 virus was observed in only 2... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: YF 17D virus recombinants; Dengue vaccine; Immunogenicity; Attenuation; Rhesus monkeys. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001200012 |
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| Santos,P.R.; Azevedo,M.L.B.; Borges,M.B.J.; Freire,M.S.; Nascimento,J.P.; Moraes,M.T.B.. |
| Measles virus is a highly contagious agent which causes a major health problem in developing countries. The viral genomic RNA is single-stranded, nonsegmented and of negative polarity. Many live attenuated vaccines for measles virus have been developed using either the prototype Edmonston strain or other locally isolated measles strains. Despite the diverse geographic origins of the vaccine viruses and the different attenuation methods used, there was remarkable sequence similarity of H, F and N genes among all vaccine strains. CAM-70 is a Japanese measles attenuated vaccine strain widely used in Brazilian children and produced by Bio-Manguinhos since 1982. Previous studies have characterized this vaccine biologically and genomically. Nevertheless, only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Measles virus; Vaccine; Nucleotide sequence; RNA sequencing. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001100005 |
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