Korean J Parasitol.  2007 Jun;45(2):149-152. 10.3347/kjp.2007.45.2.149.

Collection of Clonorchis sinensis adult worms from infected humans after praziquantel treatment

• Shen C
• Kim JH
• Lee JK
• Bae YM
• Choi MH
• Oh JK
• Lim MK
• Shin HR
• Hong ST

• KMID: 1720541
• DOI: http://doi.org/10.3347/kjp.2007.45.2.149

Abstract

A cohort was established for evaluation of cancer risk factors in Sancheong-gun, Gyeongsangnam-do, Korea. As one of the cohort studies, stools of 947 residents (403 males and 544 females, age range: 29-86 years) were screened for Clonorchis sinensis eggs using both Kato-Katz method and formalin-ether sedimentation technique. The overall egg positive rate of C. sinensis was 37.7% and individual EPG (eggs per gram of feces) counts ranged from 24 to 28,800. Eight egg positive residents voluntarily joined a process of collection of the passed worms after praziquantel treatment. A total of 158 worms were recovered from 5 of the 8 treated persons, ranged from 3 to 108 in each individual. The worms were 15-20 mm x 2-3 mm in size, and showed brown-pigmented, red, or white body colors. This is the first collection record of C. sinensis adult worms from humans through anthelmintic treatment and purgation. The adult worms of C. sinensis may be paralyzed by praziquantel and then discharged passively through bile flow in the bile duct and by peristaltic movement of the bowel.

Keyword

Clonorchis sinensis; praziquantel; human; recovery; adult worms

MeSH Terms

Adult
Aged
Aged, 80 and over
Animals
Antiplatyhelmintic Agents/*therapeutic use
Clonorchiasis/*drug therapy/epidemiology/*parasitology
Clonorchis sinensis/anatomy & histology/*isolation & purification
Feces/parasitology
Female
Humans
Korea/epidemiology
Male
Middle Aged
Neoplasms/epidemiology
Parasite Egg Count
Praziquantel/*therapeutic use
Risk Factors