FIG. 1.

Phylogenetic tree constructed from partial parvovirus B19 NS1 sequences rooted with simian parvovirus (GenBank accession number U26342). Thirty-eight B19-positive samples (boldface type) were aligned with comparative reference sequences identified by their GenBank accession numbers. B19 DNA-positive samples from this study clustered with genotypes 1A, 2, and 3B. Two samples clustered with genotype 1 but were separate from 1A and 1B and are indicted as a “novel variant.” Only significant bootstrap values (≥70%) are shown. Bar, 0.05 nucleotide substitutions per site. Asterisks refer to samples that were B19 DNA positive with the consensus NS1 PCR but negative with the genotype 1 VP2 PCR.