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Flashcards in Parasites Deck (67)
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1

Giardia lambia treatment
**exam question**

Metronidazole or other azole

2

Toxoplasma gondii treatment

Spiromycin or Pyrimethamine/Sulfadiazine

3

Schistosomes treatment

Praziquantel

4

Filariasis treatment

1. Ivermectin
2. Diethylcarbamazine

5

Babesia microti treatment

1. Clindamycin + quinone
2. Atovaquone + azithromycin

6

Cestodes/trematodes treatment

Praziquantel
Albendazole, etc

7

Nematodes treatment

1. Albendazole
2. Pyrantel pamoate
3. Ivermectin
4. Diethylcarbamazine

8

95% of malaria deaths are due to _____

P. falciparum

9

Calling card of malaria

Flu-like symptoms
Cyclic high fever/chills/rigors every 48-72 hours

10

Which Plasmodium sp. is most prevalent?

P. vivax

11

What is significant about P. vivax and P. ovale?

Contain a latent form of the parasite found in the liver, which can cause relapse. Require additional treatment with Primaquine.

12

Cardiomegaly occurs in 1/3 of patients affected with which parasite?

Trypanosoma cruzi

13

What animal is the most likely source of Trichinella infection to humans in the U.S.?

Bear

14

What is a definitive host?

The host in which the mature or sexually mature parasite lives

15

What is an intermediate host?

The organism in which the parasite develops

16

What is a trophozoite?

Metabolically active, usually motile stage. Replication.

17

What is a cyst?

Non-motile form of parasite, protected by a membrane. Infective stage.

18

What is a vector?

A living carrier that transports the parasite from infected to non-infected host.

19

How do protozoa reproduce?

Budding, schizogony, sexually

20

What is schizogony?

Multiple divisions of the nucleus before cell division

21

What is significant about Entamoeba histolytica?

It is an invasive organism.

22

Entamoeba histolytica is transmitted by ______, but not by ______.

Contaminated water / undercooked meat

23

Structural significance of Entamoeba histolytica cyst

4 nuclei
Thick wall

24

Calling card of Entamoeba histolytica

Inflammation -- deep and then lateral, causing "tear-drop, flask-shaped" ulcers

25

Major clinical manifestations of Entamoeba histolytica

Watery stools containing mucus and blood
Ulcers
Hepatic infection/abscess

26

Giardia lamblia reservoir

Humans and animals

27

Giardia lamblia associated with what conditions?

Crowded conditions--prisons, daycares, etc

28

Giardia lamblia transmission

Fecal-oral / contaminated water

29

Giardia lamblia trophozoite structure
**exam question**

2 prominent nuclei
Ventral sucking disk
4 pairs of flagella
Pear-shaped

30

Which parasite is highly resistant to chlorine, and is therefore associated with swimming pools?

Cryptosporidium parvum