Author affiliations: *Guangzhou Municipal Center for Disease Control and Prevention, Guangdong, People's Republic of China; †National Institute for Communicable Disease Control and Prevention, Beijing, People's Republic of China; ‡State Key Laboratory of Infectious Diseases Prevention and Control, Bejing, People's Republic of China; §University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
Figure. Phylogenetic relationships of severe acute respiratory syndrome (SARS) virus isolates based on the spike gene. The neighbor-joining tree was constructed by the neighbor-joining process with 1,000 bootstrap replicates. The origins of the sequences are as follows: Civet007, Civet010, Civet019, Civet020, and Civet014, palm civets from the restaurant; GD03T0013, the first SARS patient in 2004; SZ3 and SZ16, palm civets from a Shenzhen market in 2003; GZ60, HGZ8L1-A, ZS-A, ZS-B, ZS-C, and GD01, early phase isolates in 2003 without the 29-nucleotide (nt) deletion; GZ02, HSZ-Bb, HSZ-Bc, HSZ-Cb, and HSZ-Cc, early phase isolates from the 2003 epidemic with an 82-nt deletion; GZ50, HKU-36871, HKU-39849, HKU-65806, CUHK-W1, CUHK-Su10, BJ01, BJ03, Fra, Tor2, and Urbani, middle and late phase isolates from the 2003 epidemic.
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