[Passage adaptability of candidate strains for hemorrhagic fever with renal syndrome purified vaccine in Vero cells and their immunogenicity].
OBJECTIVE
To adapt the candidate strains of hemorrhagic fever with renal syndrome (HFRS) purified vaccine to Vero cells and to study their antigenicity and immunogenicity.


METHODS
The viral strains H8207 (Hantaan virus, HTN) and Y86013 (Seoul virus, SEO) were continuously propagated in Vero cell by the terminal dilution method and studied the characteristics of virus multiplication, viral titers and the amounts of virus antigen after serial passages. Three batches of crude monovalent inactivated vaccine were developed using the different passages of these 2 viral strains.


RESULTS
The strains H8207 and Y86013 adapted to Vero cells and stably grew on the cells with high titers. Rabbits immunized with the crude vaccines of H8207 and Y86013 showed 100% sero-conversion and the neutralizing antibody titers of the rabbit immune sera reached 1?10 at 4 weeks after 2 times of immunization.


CONCLUSIONS
The results suggest that these 2 candidate strains had adapted to Vero cells, possessed high titers and good immunogenicity and be feasible to prepare the HFRS purified vaccine in Vero cells.
Chen
Wei
W
Department of Etiology, Fourth Military Medical University, Xi'an 710032, China.
Xue
Cai-fang
CF
Liu
Jiang-qiu
JQ
Li
Zhong-yi
ZY
Fan
Yong-xing
YX
Xu
Lu
L
Liao
Hui
H
D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D002522:Chlorocebus aethiops; D018063:Hantaan virus / Q000254:growth & development / Q000276:immunology*; D006480:Hemorrhagic Fever with Renal Syndrome / Q000517:prevention & control; D051379:Mice; D009500:Neutralization Tests; D011817:Rabbits; D029263:Seoul virus / Q000254:growth & development / Q000276:immunology*; D014611:Vaccination; D015164:Vaccines, Inactivated / Q000276:immunology; D014709:Vero Cells; D014765:Viral Vaccines / Q000096:biosynthesis* / Q000276:immunology
D000914:Antibodies, Viral; D015164:Vaccines, Inactivated; D014765:Viral Vaccines