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Volume 15, Number 4—April 2009

Letter

Spotted Fever Group Rickettsia sp. Closely Related to R. japonica, Thailand

Nobuhiro TakadaComments to Author , Hiromi Fujita, Hiroki Kawabata, Shuji Ando, Akiko Sakata, Ai Takano, and Udom Chaithong
Author affiliations: University of Fukui, Fukui, Japan (N. Takada); Ohara General Hospital, Fukushima, Japan (H. Fujita); National Institute of Infectious Diseases, Tokyo, Japan (H. Kawabata, S. Ando, A. Sakata, A. Takano); Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand (U. Chaithong)

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Figure

Phylogenetic analysis based on ompA gene (A) and rickettsial genus–specific 17-kDa antigen gene (B). Sequences were aligned by using the ClustalW software package (http://clustalw.ddbj.nig.ac.jp/top-j.html), and neighbor-joining phylogenetic tree construction and bootstrap analysis were conducted according to the Kimura 2-parameter method (www.ddbj.nig.ac.jp). Pairwise alignments were performed with an open-gap penalty of 10, a gap extension penalty of 0.5, and a gap distance of 8. Multiple alig

Figure. Phylogenetic analysis based on ompA gene (A) and rickettsial genus–specific 17-kDa antigen gene (B). Sequences were aligned by using the ClustalW software package (http://clustalw.ddbj.nig.ac.jp/top-j.html), and neighbor-joining phylogenetic tree construction and bootstrap analysis were conducted according to the Kimura 2-parameter method (www.ddbj.nig.ac.jp). Pairwise alignments were performed with an open-gap penalty of 10, a gap extension penalty of 0.5, and a gap distance of 8. Multiple alignments were also performed with the same values, and the phylogenetic branches were supported by bootstrap analysis with 1,000 replications (>800 were indicated). Rickettsia felis (CP000053) and R. canadensis (CP000409) were used as outgroups for ompA and 17-kDa antigen gene, respectively. The phylogenetic tree was constructed by using TreeView software version 1.5 (http://taxonomy.zoology.gla.ac.uk/rod/treeview.html). Scale bars indicate nucleotide substitutions (%) per site.

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