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Nucleotide sequence comparison of the genome of two 17D-204 yellow fever vaccines.

The genome of the attenuated 17D-204 yellow fever vaccine is a single stranded RNA composed of 10862 nucleon'des. The sequence derived from the 17D-204 strain supplied by the American type culture collection (ATCC) was first published by Rice et al. (1). Independently, we have cloned the genome of the Pasteur 17D-204 vaccine. Partial sequences were reported (2,3). We have now completed the sequence by the classical method (4). The variations between the ATCC and Pasteur substrains are summarized in the Table. When possible, the changes were checked by sequencing overlapping cDNAs and the genomic RNA, using specific oligodeoxynucleotides (5,6). They were also compared with the published sequence of the virulent Asibi virus from which the 17D vaccine was derived (7).