Parisitology lab quiz 3 Flashcards Preview

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Flashcards in Parisitology lab quiz 3 Deck (67):
1

Definition:

  • Group of blood/tissue roundworms
  • require an arthropod intermediate host/vector for transmission
    • mosquito or blood-sucking fly

Filariae

2

These migrate to the lymphatics

microfilariae

3

What are the types of filariae? (5)

  • Wuchereria bancrofti
  • Brugia malayi
  • Loa loa
  • Onchocerca volvulus
  • Mansonella spp.

4

This filariae spp is nonpathogenic

Mansonella spp

5

Where are microfilariae produced?

Where do they migrate to?

Produced in tissues

Migrate to the lymphatics, blood, or skin

6

How long do female filariae tend to be?

male?

female: 30-100 mm

male: 20-40 mm

7

What is periodicity?

When microfilariae tend to be more present in peripheral blood at specific times of day or evening

8

What filariae are nocturnal?

Diurnal?

Nocturnal: Wuchereria bancrofti and Brugia malayi

Diurnal: loa loa

*Onchocerca doesn't have a periodicity

9

What does a thick smear by the modified Knott technique increase?

The presence or visualization of microfilariae

10

Obstruction of lymphatic circulation

Enlargements of legs, breasts, scrotum

Elephantiasis

11

Pointed tail

sheathed

no nuclei in tip of tail

Wuchereria bancrofti

12

Sheathed

2 nuclei in tip of tail

Brugia malayi

13

Subcutaneous swelling

sheathed

continuous nuclei into tail

Loa loa

14

Causes blinding filarial

Central America and Africa

No sheath

No nuclei in tip of tail

Onchocerca volvulus

15

Where are Loa loa typically found? (geographically)

Africa

16

Where are Brugia malayi typically found? (geographically)

Far East

17

Where are Wuchereria bancrofti typically found? (geographically)

Tropics

18

The adults of what microfilariae are found in the lymphatics? (2)

Wucheria bancrofti and Brugia malayi

19

The adults of what microfilariae are found in the subcutaneous tissue? (2)

Loa loa and Onchocerca volvulus

20

This microfilariae has no sheath and nuclei in the tip of the tail. It is also nonpathogenic

Mansonella perstans

21

Plasmodium species are ______ ________ parasites

obligate intracellular

22

Definition:

asexual reproduction in plasmodium species

multiple divisions of nucleus followed by cytoplasm

Schizogony

23

Definition:

sexual reproduction

results in spores and sporozoites

sporogony

24

Name some of the common spotozoans (7)

Plasmodium

Babesia

Cryptosporidium

Pneumocysitis

Toxoplasma

Isospora

Sarcocystis

25

Plasmodium species are the causitive agents for __________

Malaria

26

What transmits the plasmodium species?

Anopheles mosquito

27

This plasmodium species is the most clinically significant

Plasmodium falciparum

28

Plasmodium falciparums classic shape is what?

crescent shaped gametocytes

29

What is P. falciparum the most dangerous form of malaria?

  • short incubation (7-10 days)
  • paroxysms every 36-48 hours
    • large amounts of toxic products
    • vascular occlusions impair organ function
      • liver, brain, kidneys, etc.

30

P. falciparum can cause what type of fever?

  • Black water fever
    • hemoglobinuria
    • acute renal failure

31

Name the species

Plasmodium falciparum

32

Name the species

single chromatin dot

2 chromatin dots (look like headphones)

Plasmodium falciparum trophozoites

33

Name the species

Plasmodium falciparum

34

What type of red blood cells does P. falciparum infect?

all red blood cells of all ages

35

This plasmodium species infects young immature RBCs and causes them to become enlarged and distorted

Plasmodium vivax

36

This species may contain Schuffner's dots (eosinophilic stippling)

Plasmodium vivax

37

Name the species and stage

- single chromatin dot connecting ring

Plasmodium vivax trophozoite

38

Name this type of stippling

Schuffner's dots- eosinophilic stippling

39

Name the species

Plasmodium vivax

40

  • This species is difficult to distinguish from P. vivax
  • infects young, immature RBCs
    • oval and enlarged RBCs
    • usually contain Schuffner's dots

 

Plasmodium ovale

41

Name the species

Plasmodium ovale

42

  • This species infects only mature RBCs
    • no enlargement or distortion
    • may contain Ziemann's dots
      • fine, dust-like dots
    • Large chromatin dot in ring form
    • developing trophozoite contains solid cytoplasm w/ dark brown pigment
    • 6-12 merozoites in rosette form

Plasmodium malariae

43

What is the scientific term for roundworms?

Nematoda

44

What are the morphologic forms of Nematoda?

Egg, larvae, and adult worm

*there are several stages of larvae*

45

Where do adult roundworms reside?

In the intestines

46

What is the oral cavity of a roundworm known as and what is it used for?

Buccal capsule

contains hooks, teeth or cutting plates

Used for attachment

47

What is the first stage of larva known as?

Rhabditiform larva

48

What is the third stage of larva known as?

Filariform larva

49

True or false:

the rhabditiform larva is infective

false- non-infective

50

true or false:

the filariform larva is infective

 

True

51

Name some of the intestinal species of Nematoda (6)

Enterobius vermicularis

Trichuris trichiura

Ascaris lumbricoides

Necatur americanus

Ancylostoma duodenale

Strongyloides stercoralis

52

Name the intestinal-tissue species (2)

Trichinella spiralis

Dracunculus medinensis

53

What is another name for Enterobius vermicularis?

Pinworm

54

True or false:

E. vermicularis is the most common helminth infection in the US

True

55

How is E. vermicularis diagnosed? (in the lab)

Cellophane tape test

56

Name this species

Enterobius vermicularis

57

This is the 3rd most common helminth infection in the US

Trichuris trichiura

58

What is another number for Trichuris trichiura?

Whipworm

59

Name the species

Trichuris trichiura

60

This is the largest intestinal roundworm

Ascaris lumbricoides

61

World-wide this is the most common helminth infection and second most common in the US

Ascaris lumbricoides

62

What species is this?

Is it fertilized or unfertilized?

Ascaris lumbricoides

Fertilized

63

Which egg is fertilized/unfertilized

What species is this?

Ascaris lumbricoides

Left- unfertilized

Right- fertilized

64

This species is known as New World hookworm

Necatur americanus

65

This species is known as Old World hookworm

Ancylostoma duodenale

66

This is the egg of what type of worm?

Hookworm

67

This is a _________ egg

Hookworm