Multicellular Eukaryotic Parasites Topic 5 Pre-Midterm

Question 1

Where do endoparasites live?

Answer 1

They live inside the body

Question 2

What is an example of an endoparasite?

Answer 2

Tapeworms and Roundworms

Question 3

What is the life cycle like for endoparasites?

Answer 3

Complex life cycles with several hosts

Question 4

Where do enctoparasites live?

Answer 4

They live on the body (often only when feeding)

Question 5

What is an example of ectoparasites?

Answer 5

Leeches, arthropods (mites, ticks, insects)

Question 6

Ectoparasites and vectors

Answer 6

May serve as vectors for other pathogens

Question 7

What are the three types of worms?

Answer 7

Flatworms, unsegmented round worms, and segmented round worms

Question 8

What are the two types of anthropods?

Answer 8

Insects and (mites and ticks)

Question 9

Ectoparasites may serve as what for other pathogens?

Answer 9

Vectors

Question 10

Do leeches transfer diseases?

Answer 10

No

Question 11

Give an example of an ectoparasite that can serve as a vector?

Answer 11

Mosquito

Question 12

What are the two types of flatworms?

Answer 12

Tapeworms, Flukes

Question 13

What is an example of a tapeworm?

Answer 13

Taenia

Question 14

What is an example of a fluke?

Answer 14

Schitosoma

Question 15

What is the one type of non-segmented round worm? and example

Answer 15

Nematode eg. Ascaris

Question 16

What is the one type of segmented round worms?

Answer 16

Leeches

Question 17

Simply describe the lifecycle of the flatworm and tapeworms?

Answer 17

Complex with multiple hosts

Question 18

What host is the human in a flatworm and tapeworm?

Answer 18

Definitive host and/or intermediate host

Question 19

Define the definitive host in a flatworm and tapeworm?

Answer 19

Where the parasite reaches maturity, and produces sexually

Question 20

Define the intermediate host in a flatworm and tapeworm?

Answer 20

Houses the immature (larval) stage of the parasite

Question 21

What host does sex always occur in (tapeworm and flatworms)

Answer 21

Definitive host

Question 22

If reproductive happens in the intermediate host, what type of sex is it?

Answer 22

Asexual in the larval

Question 23

What is the term for a tapeworm infection?

Answer 23

Taeniasis

Question 24

What is the definitive host in the beef tapeworm?

Answer 24

Human

Question 25

What is the intermediate host in the beef tapeworm?

Answer 25

Cow

Question 26

Where does the larval stage happen in a beef tapeworm?

Answer 26

The larval stage encyts in cow muscle and is ingested by human (obtained from uncooked beef)

Question 27

What host is the human in the pork tapeworm?

Answer 27

Definitive or intermediate host

Question 28

Where does the final form live in the pork tapeworm?

Answer 28

In the intestine, intermediate for cause cysticercosis of muscle, nervous tissue, or eyes

Question 29

How does a tapeworm complete their lifecycle?

Answer 29

They have to go through 2 or more different hosts (some need to go into specific hosts, if they are in the wrong host, they will die)

Question 30

How do you get the beef tapeworm?

Answer 30

By consuming uncooked meat (the worm dies at 56 degrees)

Question 31

Simply describe the steps of the beef tapeworm? (Cows --> Human)

Answer 31

- Human consumes meat that has cysts in the muscle - Grows as adult in human small intestine - Eggs released in feces - Consumed by cow

Question 32

What is the scolex of a beef tapeworm?

Answer 32

"Head" | - has suckers and hooks

Question 33

What are the proglottids?

Answer 33

- Body segments - Each contains ovaries and testis - Fill with eggs and are shed with feces - Don't have internal organs

Question 34

What are the sex organs of proglottids?

Answer 34

- Ovary - Uterus - Testes

Question 35

What host is the human in a pork tapeworm?

Answer 35

The definitive or intermediate host Definitive = Ate pork that had larva inside the meat Intermediate = Ate the eggs

Question 36

Describe the lifecycle of a pork tapeworm?

Answer 36

See slide 14

Question 37

What happens in cysticercosis?

Answer 37

The human is the intermediate host due to ingestion of eggs - Larvae are able to invade tissue (muscle, eye, brain, spinal cord, heart) - Don't grow into adult form or reproduce in intermediate host

Question 38

How can cysticercosis happen?

Answer 38

May have ate vegetables that were raw

Question 39

What is neurocysticercosis (NCC)?

Answer 39

Larval cysts travel to the brain | - The most common parasitic infection of CNS

Question 40

How many hosts may tapeworms go through?

Answer 40

4 or 5

Question 41

Tapeworms for pets

Answer 41

The larva lives inside the flea (flea is the intermediate host), the dog needs to eat the flea to complete the life cycle