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Zoonotic > Protozoa, Cestodes & Trematodes > Flashcards

Protozoa, Cestodes & Trematodes Flashcards

1
Q

Single-celled organisms with multiple stages

A

Protozoa

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2
Q

Cestodes

A

Tapeworms

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3
Q

(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

A

Trematodes

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4
Q

What Cestode causes cystic hydatid disease in humans?

A

Echinococcus granulosus

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5
Q

What Cestode causes alveolar or hydatid disease?

A

Echinococcus multilocularis

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6
Q

Pork tapeworm

A

Taenia solium

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7
Q

Beef tapeworm

A

Taenia saginata
(Humans are the definitive host)

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8
Q

cucumber seed tapeworm/ flea tapeworm

A

Dipylidium caninum

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9
Q

Paragonimus kellicotti is a:

A

Trematode

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10
Q

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

A

Giardia

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11
Q

Which form of Giardia is an environmentally stable stage?

A

Cyst

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12
Q

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

A

False

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13
Q

(T/F) All Giardia are equally zoonotic

A

False

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14
Q

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

A

False

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15
Q

What must humans ingest to become infected with Giardia?

A

Ingest a infective Giardia Cyst

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16
Q

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

A

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

17
Q

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

A

Thick-walled

18
Q

Toxoplasma gondii
Mode of transmission is:

A
  • Sporulated oocysts in felid feces, environmental transmission
  • Undercooked meat with tissue cysts (bradyzoites)
  • Cross-contamination in kitchen
19
Q

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

A

Cats

20
Q

There are 20 different species of:

A

Leishmania

21
Q

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

A

Dogs

22
Q

Cutaneous leishmaniasis:

A

skin lesions

23
Q

Visceral leishmaniasis:

A

affects organs, spleen, liver, BM

24
Q

Some physical manifestations of canine visceral leishmaniasis are caused by:

A

Leishmania infantum

25
Q

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

A

E. granulosus, T. solium

26
Q

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

A

Yes

27
Q

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

A

Unilocular, Multilocular

28
Q

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

A

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

29
Q

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

A

Praziquantel in humans

30
Q

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

A

Dipylidium caninum

31
Q

lung fluke, pneumonia

A

Paragonimus kellicotti (trematode)

32
Q

How do humans and dogs get infected with Paragonimus kellicotti?

A

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

Zoonotic (18 decks)

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