FASCIOLOPSIS BUSKI. Introduction. Fasciolopsis buski is known scientifically as the largest intestinal fluke in humans.Infection occurs primarily in Asia and the Indian subcontinent, especially in area where humans raise pigs and consume freshwater plants, so this helminth is also
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Fasciolopsis buski is known scientifically as the
largest intestinal fluke in humans.Infection occurs
primarily in Asia and the Indian subcontinent,
especially in area where humans raise pigs and
consume freshwater plants, so this helminth is also
named as “giant Asian intestinal fluke”.This giant
parasite has even been described as “meat worm”
or “reddish worm” in traditional Chinese medical book.
No seminal receptacle
ventral sucker is 3-4 times larger than oral sucker
The thinner shell with an operculum
(not so obvious)
encloses an ovum
and 20-40 yolk cells
Slightly yellow in color
130-140×80-85µm (the largest helminth egg)
Oval / long elliptic in shape
The first intermediate host：
The second intermediate host：
Aquatic plant vector
II. Life cycle
Adolescent Adult Eggs
Duodenum In Human Body
3 monthsare discharged
man eats metacercariae in feces
on raw water plants
Metacercaria Eggs get into water
encystations on theIn Water25-30℃
surface of water plants2-3 months3-4weeks
Many cercaria asexual reproduction Planorbis snail
Many daughter rediae Many mother rediae Sporocysts
III. Pathology and Symptomatology
1. Direct fecal smear,
2. Water sedimentation method
V. Treatment and Prevention
1. The treatment of the patients, carriers and pigs
Drug of choice is praziquantel. Other effective
drugs include hexachloroparaxylene, bithionol (bitin).
The drug for pig is dipterex (敌百虫).
(1) Health education
(2) Deal with night soil.
(3) Avoid feeding pigs on raw water plants
This disease is prevalent in Southeast
Asia,China, Japan, Korea, Thailand, Burma, Kampuchea, Vietnam, Bangladesh, Philippines,Indonesia, Malaya and India
. In China it is found in 18 provinces, city and
autonomic region except north and west regions.
The prevalence of fasciolopiasis is relative to growing water plants and feeding pigs
on water plants.
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