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Phylogenetic tree based on the sequences of the gltA gene (332 bp) for Rickettsia spp. Amplicons by PCR for Rickettsia gltA were sequenced and classified into 4 different gltA genotypes (RG1 to RG4). DNA sequences obtained in the present study are indicated in red. Numbers in parentheses represent GenBank accession numbers. The unit of branch length is nucleotide substitutions per site.
