T6 - Metagonimiasis

Question 1

disease caused by intestinal trematode, most commonly Metagonimus yokogawai

Answer 1

Metagonimiasis

Question 2

causes Metagonimiasis

Answer 2

Metagonimus yokogawai

Question 3

life cycle of Metagonimus

Answer 3

1. embryonated eggs with fully-developed miracidium passed in feces
2. snail host ingest eggs, miracidia emerge and penetrate snail tissues
3. cercariae released from snail
4. cercariae penetrate skin of fish/brackish water fish and encyst as metacercariae in tissue of flesh
5. host infected by ingesting undercooked fish containing metacercariae
6. metacercariae excyst in small intestine
   adult in small intestine

Question 4

mode of transmission of Metagonimus

Answer 4

1. consuming raw or undercooked freshwater
2. parasite enters digestive system

Question 5

pathogenesis of Metagonimus

Answer 5

Adult flukes attach to intestinal lining cause mechanical irritation and inflammation, causing tissue damage

Question 6

Symptoms of Metagonimiasis:
mild to moderate

Answer 6

• diarrhea
• abdominal pain/cramping
• fatigue/weakness
• loss of appetite

Question 7

Symptoms of Metagonimiasis in severe cases

Answer 7

• prolonged diarrhea and malabsorption
• intestinal ulcers and bleeding
• eosinophilia
• migration to heart or brain (myocarditis or neurological issues)

Question 8

diagnosis for Metagonimiasis

Answer 8

1. Stool analysis
2. ELISA test
3. Anthelmintic Treatment

Question 9

Geographical Distribution of Metagonimus

Answer 9

1. Far East and Siberia
2. Japan
3. Korea
4. China
5. Taiwan
6. Balkans
7. Spain
8. Indonesia
9. Philippines
10. Russia

Question 10

people at risk of Metagonimiasis

Answer 10

1. People who eat raw or undercooked freshwater fish
2. Fish-eating animals such as dogs, cats, pigs, and birds

Question 11

treament for Metagonimiasis

Answer 11

1. Anthelmintic drugs
2. Praziquantel
3. Tetrachloroethylene