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Fasciolopsis Buski. Fasciolopsis buski . Fasciolopsis buski is prevalent in Southeast Asia and lives in humans and pigs’ intestines, so it is also called Asia Giant Intestinal Fluke. The prevalence of fasciolopiasis is related to growing water plants and feeding pigs on water plants.

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fasciolopsis buski2
Fasciolopsis buski

Fasciolopsis buski is prevalent in Southeast Asia and lives in humans and pigs’ intestines, so it is also called Asia Giant Intestinal Fluke. The prevalence of fasciolopiasis is related to growing water plants and feeding pigs on water plants.

i morphology
I. morphology

1. Adult: the body is long elliptic, flesh-colored, looks like a slice of raw meat. The size is about 20-75× 8-20 ×1-3mm, the largest one of human trematodes. The ventral sucker is near by the much smaller oral sucker. Two coral-liked testes are located in the posterior half of the body.

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2. egg is oval in shape, slight yellow in color, 130-140×80-85µ(the largest helminth egg). The thinner shell with an operculum encloses an ovum and 20-40 yolk cells.

ii life cycle
II. Life cycle

1. Site of inhabitation: small intestine

2. Infective stage: metacercaria

3. Infective mode: eating raw water plants with metacercariae

4. Medium of water plants: chestnut, water bamboo and caltrop

5. Intermediate hosts: Planorbis snail

6. Reservoir host: pig

7. Life span: 1-4 years

iii pathology and symptomatology
III. Pathology and Symptomatology

1. Enteritis due to the attachment of the adults manifests abdominal discomfort, nausea, vomiting and diarrhea.

2. Malnutrition results from the worms sharing food with the host and diarrhea . Manifests anemia, edema of leg and face even ascites.

iv diagnosis
IV. Diagnosis

Stool examination:

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 praziqantel. Other effective drugs include hexachloroparaxylol, bithionol (bitin).

2. Prevention

(1) Health education, (2) Deal with night soil.

(3) Avoid feeding pigs on raw water plants

vi epidemiology
VI. Epidemiology

This disease is prevalent in Southeast Asia. In China it is found in 18 provinces, city and autonomic region except north and west regions.

The prevalence of fasciolopiasis is related to growing water plants and feeding pigs on water plants.