Protozoa, Cestodes & Trematodes

Question 1

Single-celled organisms with multiple stages

Answer 1

Protozoa

Question 2

Cestodes

Answer 2

Tapeworms

Question 3

(Flukes) are parasitic flatworms with unique life cycles involving sexual reproduction in mammalian and other vertebrate definitive hosts and asexual reproduction in snail intermediate hosts

Answer 3

Trematodes

Question 4

What Cestode causes cystic hydatid disease in humans?

Answer 4

Echinococcus granulosus

Question 5

What Cestode causes alveolar or hydatid disease?

Answer 5

Echinococcus multilocularis

Question 6

Pork tapeworm

Answer 6

Taenia solium

Question 7

Beef tapeworm

Answer 7

Taenia saginata
(Humans are the definitive host)

Question 8

cucumber seed tapeworm/ flea tapeworm

Answer 8

Dipylidium caninum

Question 9

Paragonimus kellicotti is a:

Answer 9

Trematode

Question 10

What protozoa is this describing:
- Simple
- Cyst stage and Trophozoite stage (2 stages)
- Will travel to GI tract

Answer 10

Giardia

Question 11

Which form of Giardia is an environmentally stable stage?

Answer 11

Cyst

Question 12

(T/F) If a human or animal ingested the trophozoite form of Giardia, it will survive the stomach acid and infect the small intestines

Answer 12

False

Question 13

(T/F) All Giardia are equally zoonotic

Answer 13

False

Question 14

(T/F) Chlorination can completely destroy the Giardia cyst

Answer 14

False

Question 15

What must humans ingest to become infected with Giardia?

Answer 15

Ingest a infective Giardia Cyst

Question 16

Cryptosporidium
Oocysts include thin-walled and thick-walled oocytes. Which are the ones that never make it out into the environment?

Answer 16

Thin-walled = they break down while they are still in the GI tract and will initiate another round of infection called autoinfection

Question 17

Cryptosporidium
Oocysts include thin-walled and thick-walled oocytes. Which one gets excreted into the environment to infect another host along the way?

Answer 17

Thick-walled

Question 18

Toxoplasma gondii
Mode of transmission is:

Answer 18

• Sporulated oocysts in felid feces, environmental transmission
• Undercooked meat with tissue cysts (bradyzoites)
• Cross-contamination in kitchen

Question 19

What species can serve as a Definitive Host for Hammondia (not a zoonotic parasite)?

Answer 19

Cats

Question 20

There are 20 different species of:

Answer 20

Leishmania

Question 21

What species is considered a reservoir for Leishmania in areas where it is endemic?

Answer 21

Dogs

Question 22

Cutaneous leishmaniasis:

Answer 22

skin lesions

Question 23

Visceral leishmaniasis:

Answer 23

affects organs, spleen, liver, BM

Question 24

Some physical manifestations of canine visceral leishmaniasis are caused by:

Answer 24

Leishmania infantum

Question 25

Result of accidental consumption of soil, water, or food that has been contaminated by the fecal matter of an infected dog/canid (_________) or human (________) using poor hygiene

Answer 25

E. granulosus, T. solium

Question 26

Can humans as an intermediate host for cestodes be harmed by the intermediate host stages (metacestode)?

Answer 26

Yes

Question 27

Echinococcus spp. - E. granulosis: _____________ hydatid cysts - E. multilocularis: _______________ hydatid cyst

Answer 27

Unilocular, Multilocular

Question 28

Taenia spp - T. solium: ______________ (cysticerci, plural) - T. saginata (no IH host in humans, humans are ________)

Answer 28

Cysticercus, the definitive host (going to find the adult tapeworm in the small intestines)

Question 29

Treatment and prevention for T. solium: Anthelmintics -> ________________

Answer 29

Praziquantel in humans

Question 30

What is the following describing: The definitive host becomes infected when they ingest an infected flea or infected flea larvae from the environment

Answer 30

Dipylidium caninum

Question 31

lung fluke, pneumonia

Answer 31

Paragonimus kellicotti (trematode)

Question 32

How do humans and dogs get infected with Paragonimus kellicotti?

Answer 32

Through the ingestion of an undercooked or raw intermediate host stage that has the metacercariae stage in its tissue