Module 7: Soil-Transmitted Helminths

Question 1

Most common and most important parasites of Humans

Answer 1

Soil-Transmitted Helminthes

Question 2

In general, this are transmitted thorugh fecal oral route

Answer 2

Roundworms

Question 3

The eggs are normally passed out in the ____ of a patient that harbors the parasite

Answer 3

feces

Question 4

The eggs in order to become infectious, they have to _______

Answer 4

embryonate in the soil

Question 5

The outer surface of the eggs that are rough and bumpy is called

Answer 5

mamillated

Question 6

How long does the larvae develop inside the eggs before becoming infective

Answer 6

3 weeks

Question 7

True or False

Male worms are longer than Female worms

Answer 7

False

Female worms are longer at 15-45cm in length

Question 8

In genitals, female worms have a _ and males have a ______

Answer 8

• Females: genital girdle (arrow)
• Males: curled posterior end

Question 9

True or False

STH is a disease of the poor and are considered neglected tropical diseaeses.

Answer 9

True

Question 10

Hookeworm infection is transmitted primarily by _______

Answer 10

walking barefoot on contaminated soil

Question 11

People can be infected by Ascaris and whipworm when ______

Answer 11

eggs are ingested

Question 12

Enumerate 3

Parasites found on fish meat

Answer 12

1. Anisakis
2. Diphyllobotrium latum
3. Heterophyes heterophyes

Question 13

This is the longest human tapeworm and is typically 4-15 meters in length but can grow up to 25 meters within the human intestine.

Answer 13

D. latum

Question 14

Diphyllobothriasis occurs from the ingestion of the larval forms of the

Answer 14

fish tapeworm

Question 15

Enumerate 2

Parasites in the Pork and Beef muscle

Answer 15

1. Taenia solium
2. Taenia saginata

Question 16

It is a monoecious trematode or fluke that utilizes snails as first and second intermediate host.

Answer 16

Echinostoma ilocanum

Question 17

This is the final larval form of trematode, in which the larva is encysted, tailless and infective

Answer 17

Metacercaria