Fig. 3.

Nucleotide sequences of a region of the 18S D1 rDNA gene of Ascaris lumbricoides from the common bile duct stone extracts as compared to modern sequences among the family Ascarididae. A dot (.) denotes an identical nucleotide position. A non-identical nucleotide denotes nucleotide addition at the same position. Each of the primer sequences are indicated by an underline. The sequence is from GenBank (EF654660; A. lumbricoides from stone, U94366; A. lumbricoides from human, AF036587; A. suum from pig, and U94383; Toxascaris leonina from dog).