Trematodes

Question 1

name the 2 trematodes (flukes)

Answer 1

• Schistosoma
• Clonorchis sinensis

Question 2

Schistosoma–disease

Answer 2

• liver and spleen enlargement (S. mansoni, egg with lateral spine (A)), fibrosis, and inflammation
• chronic infection with S. haematobium (egg with terminal spine (B)) can lead to squamous cell carcinoma of the bladder (painless hematuria) and pulmonary hypertension

Question 3

Schistosoma–transmission

Answer 3

• snails are host
• cercariae penetrate skin of humans

Question 4

Schistosoma–treatment

Answer 4

• Praziquantel

Question 5

Clonorchis sinensis–disease

Answer 5

• biliary tract inflammation –> pigmented gallstones
• associated with cholangiocarcinoma

Question 6

Clonorchis sinensis–transmission

Answer 6

• undercooked fish

Question 7

Clonorchis sinensis–treatment

Answer 7

• praziquantel