Parisitology lab quiz 3 Flashcards Preview

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Flashcards in Parisitology lab quiz 3 Deck (67)
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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