== The rNV VLPs were prepared inSpodoptera frugiperda(Sf9) insect cells as previously explained, with minor modifications (21,26)
== The rNV VLPs were prepared inSpodoptera frugiperda(Sf9) insect cells as previously explained, with minor modifications (21,26). are immunogenic when administered orally in the absence of any delivery system or mucosal adjuvant. These studies demonstrate that rNV VLPs are an excellent model to study the oral delivery of antigen, and they are a potential mucosal vaccine for NV infections. Norwalk computer virus (NV) is usually classified as a calicivirus based on virion morphology (nonenveloped icosahedral particle with cuplike depressions), biochemical properties (single capsid protein of 58 kDa), and characteristics of the viral genome (single-stranded RNA of positive polarity composed of three open reading frames) (24,26,27). NV and NV-related brokers are difficult to study because these viruses cannot be cultivated in cell culture and an animal model is not available for…