Abstract: 　Objective To study epidemiological factors of taeniasis and to detect amino acid and element components of adult worms in Duyun of Guizhou Province. Methods ① Traditional methods were used for epidemiological investigation. ② Automatic amino acid analyzer and bioassay were applied for the detection. Results Among 70 persons with clinical symptoms, 25 patients (24 men and 1 woman) were found to have adult taenia worms in their faeces after taking Areca catechu L. and other drugs. Sixteen amino acids and 12 elements were determined in adult worms. Conclusion Duyun area in Guizhou is a highly endemic area of taeniasis. The pathogenic parasite is identified as Taenia saginata asiatica. Its clinical symptoms are similar to that of Taenia saginata saginata.

Key words: Taenia saginata asiatica, epidemiological investigation, amino acid, macro element, trace element