Trematodes (Flukes)

Question 1

Intermediate host of schistosoma japonicum

Answer 1

Oncomelania hupensis quadrasi (Snail)

Question 2

Reside in the mesenteric and portal veins; create eggs that cause hypersensitivity, granuloma formation and obstruction

Answer 2

Schistosoma japonicum (Schistosomiasis)

Question 3

Hypersensitivity reaction to the eggs of schistosoma; resembles serum sickness

Answer 3

Katayama fever

Question 4

Areas of endemicity for Schistosomiasis (6)

Answer 4

1. Sorsogon
2. Samar
3. Leyte
4. Oriental Mindoro
5. Bohol
6. All of Mindanao EXCEPT Misamis Oriental

Question 5

DOC for all trematodes

Answer 5

Praziquantel

Question 6

Intermediate hosts for Paragonimus westermani (2)

Answer 6

1. Snail (Antemelania asperata)

2. Mountain crab (Sundathelphusa philippina)

Question 7

Transmitted via undercooked crab meat; seen on 3% NaOH preparation; can cause hemoptysis with ring shadow opacities on CXR, granulomatous reaction similar to TB

Answer 7

Paragonimus westermani (lung fluke)

Question 8

Liver flukes (2)

Answer 8

1. Clonorchis sinensis

2. Opistorchis viverrini

Question 9

Intermediate hosts of liver flukes (2)

Answer 9

1. Snail (parafossarulus)

2. Fish (cyprinidae)

Question 10

Melon-like ridges on potassium permanganate stain; can cause hepatobiliary disease, pancreatitis, or cholangiocarcinoma (Klatskin tumor)

Answer 10

Chlonorchis sinensis (liver fluke)

Question 11

Transmitted by eating contaminated watercress or aquatic plants; cause Halzoun (obstructive jaundice and painful pharyngitis)

Answer 11

Fasciola hepatica (sheep liver fluke)

Question 12

Worm intoxication (anasarca and coma from accumulation of toxins)

Answer 12

Fasciolopsis buski (intestinal fluke)

Question 13

Mimics peptic ulcer disease

Answer 13

Heterophyes heterophyes