Trematode Classification and Characteristics

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What is the characteristic of the cercaria that enables it to infect the definitive host through wet skin penetration?

It has no tail
It has two tails
It has a shell
It has one tail (correct)

Which protozoan is associated with pigs?

Schistosoma spp.
Echinococcus granulosus (correct)
The Giant Intestinal Protozoan
Heterophyes heterophyes

What is the purpose of creating a brine solution in the given procedure?

To create a fecal shake
To preserve the sample
To observe crystal formations
To dissolve the sample (correct)

What is the recommended duration of time to leave the vial undisturbed after adding the brine solution?

2 hours (C) Signup and view all the answers

What is the purpose of carefully placing a coverslip on top of the vial?

To allow for better observation (A) Signup and view all the answers

What is the unique structure found in male schistosomes that receive a female during copulation?

Gynecophoral canal (A) Signup and view all the answers

What is the infective stage of the schistosome life cycle?

Cercaria (A) Signup and view all the answers

What is the approximate duration of the schistosome life cycle in humans?

20-30 years (A) Signup and view all the answers

What is the primary habitat of adult schistosomes?

Portal vein and its branches (B) Signup and view all the answers

What is the characteristic of the egg morphology of Schistosoma japonicum?

Lateral knob (A) Signup and view all the answers

What is the treatment for schistosomiasis?

Praziquantel (A) Signup and view all the answers

What is the diagnostic stage of schistosomiasis?

Egg (B) Signup and view all the answers

What is the sensitivity of the Merthiolate-Iodine Formol Concentration Technique (MIFC) for schistosomiasis diagnosis?

Sensitive for moderate and heavy infections (A) Signup and view all the answers

What is the purpose of the Kato Katz Technique in schistosomiasis diagnosis?

For enumeration of eggs (B) Signup and view all the answers

How many endemic provinces are there in the Philippines for schistosomiasis?

24 (C) Signup and view all the answers

What type of arrangement do the testes of Fasciola hepatica, Fasciolopsis buski, and Clonorchis sinensis have?

Tandem (A) Signup and view all the answers

What is the shape of the ovary in some trematodes?

Round (C) Signup and view all the answers

Which of the following trematodes has a collar spine in a horse shoe shape?

Echinostoma ilocanum (A) Signup and view all the answers

Which of the following trematodes has a prominent cephalic cone or broad shoulder?

Fasciola hepatica (B) Signup and view all the answers

What is the classification of the digestive tract of trematodes into?

Simple and Branched (C) Signup and view all the answers

What is the primary mode of transmission of Clonorchis sinensis infection?

Consuming raw or undercooked fish (A) Signup and view all the answers

What is a common symptom of Clonorchis sinensis infection?

Dull pain at the right hypochondrium (B) Signup and view all the answers

What is the treatment of choice for Clonorchis sinensis infection?

Praziquantel (C) Signup and view all the answers

What is the characteristic shape of the adult Clonorchis sinensis?

Narrow, oblong, and flatworm (D) Signup and view all the answers

What is the diagnostic test of choice for Clonorchis sinensis infection?

ELISA with crude Clonorchis sinensis antigen (A) Signup and view all the answers

What is a possible complication of Clonorchis sinensis infection?

All of the above (D) Signup and view all the answers

What is the primary mode of transmission of Metagonimus yokogawai?

Ingestion of undercooked or raw freshwater fish (A) Signup and view all the answers

What is the characteristic feature of the adult morphology of Metagonimus yokogawai?

Small size, with a length of 0.45 to 0.89 mm and width of 0.21 to 0.32 mm (D) Signup and view all the answers

What is the intermediate host for Metagonimus yokogawai?

Freshwater fish (B) Signup and view all the answers

What is the treatment of choice for Metagonimus yokogawai infection?