Family: OPISTORCHIDAE

Question 1

Characteristics:

Answer 1

Anterior portion narrower than posterior
- eggs are embryonated when laid

Question 2

Parasitic in :

Answer 2

Bile ducts , pancreatic ducts and gall bladder

Question 3

Genera

Answer 3

OPISTORCHIS
METORCHIS

Question 4

“Chinese liver flukes”

Answer 4

Opistorchis sinensis

Question 5

O.sinensis Host

Answer 5

Man, dog , cat and pigs

Question 6

Site

Answer 6

Gall bladder and bile ducts

Question 7

Morphology of o. Sinensis

Answer 7

Egg contain miracidium

Question 8

“Civet cat” is the type host but may also occur in domestic and wild cats

Answer 8

O.viverrini

Question 9

Reservior host of O.viverrini

Answer 9

Cholangiosarcoma

Question 10

Primary affects cats and human

Answer 10

Opistorchis fileneus

Question 11

Site

Answer 11

Bile ducts
Intestine
Pancreatic

Question 12

Found in the intestine of rail (avian)

Answer 12

Metorchis caintaensis

Question 13

Life cycle of Metorchis caintaensis

Answer 13

Eggs passed out feces
Intermediate host vivipara sp. , melania sp.
Sporocyst
Redia
Cercaria
Metacercaria liberated in duodenum

Question 14

Pathogenesis

Answer 14

O.viverrini is carcinogenic
Often leading to cholangiosarcoma

Question 15

Treatment for adults and eggs

Answer 15

Praziquantel
Eggs - niclofolan