Evaluation of two chimeric bovine-human parainfluenza virus type 3 vaccines in infants and young children
نویسندگان
چکیده
منابع مشابه
Antibody responses to bovine parainfluenza virus type 3 (PIV3) vaccination and human PIV3 infection in young infants.
A phase 2 clinical trial was conducted to evaluate the antibody responses to bovine parainfluenza virus type 3 (bPIV3) vaccination in young infants. Three groups were tested as follows: placebo (n=66) and 10(5) (n=64) or 10(6) (n=62) TCID(50) of bPIV3. The vaccine or placebo was administered intranasally at ages 2, 4, 6, and 12-15 months, and serum specimens were collected at ages 2, 6, 7, 12-1...
متن کاملHalf-life of human parainfluenza virus type 3 (hPIV3) maternal antibody and cumulative proportion of hPIV3 infection in young infants.
During a phase 2 trial of parainfluenza virus type 3 (PIV3) vaccine, sequential serum samples were obtained from infants at 2, 6, 7, 12-15, and 13-16 months of age. Paired serum samples obtained at 2 and 6 months of age were used to estimate the biologic half-life of human PIV3 (hPIV3) maternal antibody in young infants. On the basis of the assumption that hPIV3 maternal antibody decays exponen...
متن کاملEffects of human metapneumovirus and respiratory syncytial virus antigen insertion in two 3' proximal genome positions of bovine/human parainfluenza virus type 3 on virus replication and immunogenicity.
A live attenuated bovine parainfluenza virus type 3 (PIV3), harboring the fusion (F) and hemagglutinin-neuraminidase (HN) genes of human PIV3, was used as a virus vector to express surface glycoproteins derived from two human pathogens, human metapneumovirus (hMPV) and respiratory syncytial virus (RSV). RSV and hMPV are both paramyxoviruses that cause respiratory disease in young children, the ...
متن کاملEvaluation of bovine, cold-adapted human, and wild-type human parainfluenza type 3 viruses in adult volunteers and in chimpanzees.
In an attempt to evaluate the level of attenuation of live parainfluenza type 3 virus (PIV3) vaccine candidates, we compared the responses of partially immune adult volunteers inoculated intranasally with 10(6) to 10(7) 50% tissue culture infective dose (TCID50) of bovine PIV3 (n = 18) or cold-adapted (ca) PIV3 (n = 37) with those of 28 adults administered 10(6) to 10(7) TCID50 of wild-type PIV...
متن کاملBovine parainfluenza type 3 virus infection: ultrastructural aspects of viral pathogenesis in the bovine respiratory tract.
After aerosolization of a bovine strain of parainfluenza type 3 virus, the pathogenesis of the virus was followed from the trachea to the bronchioalveolar compartments of the lung of colostrum-free calves and of conventionally reared calves during a 5- to 12-day postexposure interval. By tissue titration, plaque assay, and electron microscopy, it was found that virus infection could be establi...
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ژورنال
عنوان ژورنال: Vaccine
سال: 2012
ISSN: 0264-410X
DOI: 10.1016/j.vaccine.2011.12.022