Abstract

Protection levels of an attenuated antirabies vaccine, of ERA origin, prepared in Kidney tissue culture, were evaluated in mice. Two schemes of vaccination were utilized: a single dose and 6 doses on alternate days. Animals of different experimental groups were challenged at 15, 30, 60 and 120 days postimmunization with six antigenic variants of rabies virus: strains of dog origin (S. Paulo, Brazil and Nigeria), vampire origin (DR-19 and Pernambuco, Brazil), fox origin (Rio Grande do Norte, Brazil), and CVS (Challenge Virus Standard). The results showed the effectiveness of the ERA vaccine against all antigenic variants of street and sylvatic rabies virus, independently of the vaccination scheme. Against the laboratory strains (DR-19 and CVS) the ERA vaccine was less effective, mainly in the groups vaccinated with a single dose.

Highlights

  • The results showed the effectiveness of the ERA vaccine against all antigenic variants of street and sylvatic rabies virus, independently of the vaccination scheme

  • Against the laboratory strains (DR-19 and CVS) the ERAvaccine was less effective, mainly in the groups vaccinated with a single dose

  • J. Antigenic variants of rabies virus in isolates from Eastern, Central and Northern Canada

Read more

Summary

MATERIAL E MÉTODO

Foram utilizadas 6 variantes antigênicas do vírus da raiva, em suspensão a 20% de cérebros de camundongos, identificadas como antigenicamente distintas, através dos anticorpos monoclonais antinucleocapside (Germano e col.13,15, 1988, 1990; Erbolatoe col.11,1989), assim identificadas: - C/SP, isolada de cão proveniente da cidade de Jales, São Paulo, segunda passagem em camundongos; - C/NG, isolada de cão proveniente da Nigéria, África, sexta passagem em camundongos; - Z/RN, isolada de raposa do Estado do Rio Grande do Norte, primeira passagem em camundongos; - M/PE, isolada de morcego do Estado de Pernambuco, primeira passagem em camundongos; - DR-19, isolada de Desmodus rotundus do Brasil (Fuenzalida e Larghi12, 1972), adaptada às condições de laboratório, vigésima segunda passagem em camundongos; e, - CVS "Challenge Virus Standard". O título obtido pela prova de potência de Koprowski (Koprowski18,1973) foi da ordem de 104.50/0,03 ml

Inoculação Experimental
DISCUSSÃO E CONCLUSÕES
REFERÊNCIAS BIBLIOGRÁFICAS
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call