Fig. 1.

Schematic representation of the strategy used to PCR amplify PoAstV sequences. The upper panel represents the complete human AstV-1 genome. The 3 ORFs encoding the AstV proteins are boxed; the 5′ UTR, 3′ UTR and polyA tail are also shown. The two sequential steps used in the detection and amplification of the AstV sequence are shown in the lower part of the figure. The position and orientation of the primers used are indicated by arrows