Lesson 3: 7/22/14

Question 0

2. Examples of facultative parasites?

Answer 0

STRONGyloides stercoralis
–threadworm, smallest nematode.
“Free-living adult worms”

Question 1

1. Examples of obligate parasites?

Answer 1

Ascaris lumbricoides
PNE:
Trichomonas sp.
Dientamoeba fragilis (flagellate)
Entamoeba gingivalis

Question 2

3. Examples of vectors?

Answer 2

Mosquitoes, flies,
Midges/gnats, bugs.
(Carry intermittent parasites).

Question 3

4. Species of mosquito?

Answer 3

Anopheles minimus flavirostris
Aedes species
Mansonia species

Question 4

5. Anopheles minimus flavirostris’ parasites?

Answer 4

Plasmodium (malarial)
Wuchereria bancrofti (filarial worm)
–DS: microfilarial (knott’s conc.)
*night biters, angle

Question 5

6. Aedes sp.’s parasites?

Answer 5

Filarials worms

*day biters

Question 6

7. Mansonia sp.’s parasites?

Answer 6

Lymphatic filarial worms:

• Brugia malayi
• Wuchereria bancrofti

Question 7

8. Species of flies?

Answer 7

Tabanid fly—Chrysops species
Black fly—Simulium species
Tse-tse fly—Glossina species

Question 8

9. Chrysops sp.’s parasites?

Answer 8

Loa loa

-“African eye worm”

Question 9

10. Simulium sp.’s parasites?

Answer 9

Anchocerca volvolus

-“blinding filarial worm”

Question 10

11. Glossina sp.’s parasites?

Answer 10

Trypanosoma bruce rhodesiense
Trypanosoma bruce gambiense
–causes sleeping sickness

Question 11

12. Species of midges/gnats?

Answer 11

Culicoides species

Question 12

13. Culicoides sp.’s parasites?

Answer 12

Mansonella / Dipetalonema

-filarial worms

Question 13

14. Species of bugs?

Answer 13

Reduviidae

• “kissing bugs / assassin bugs”
• transmission: defacation

Question 14

15. Reduviidae’s parasites?

Answer 14

Trypanosoma cruzi (hemoflagellate)

• causes Chaga’s disease
• -xenodiagnosis

Question 15

16. Soil-transmitted parasites and characteristics?

Answer 15

Ascaris lumbricoides (round)
Trichuris trichura (whipworm, barrel)
Hookworms (thin-shelled, 2-8 cell stage blastomeres)

Question 16

17. Soil-transmitted parasites and MOT?

Answer 16

Ascaris lumbricoides–ingestion (embryonated)
Trichuris trichura–ingestion (embryonated)
Hookworms–skin penetration (flariform)
*Hookworm larva: Rhabditiform

Question 17

18. Examples of human hookworms?

Answer 17

Necator americanus, “New World hookworm”
Ancylostoma duodenale, “Old Worm hookworm”
-Transmammary

Question 18

19. Examples of animal hookworms?

Answer 18

Dog hookworm

Cat hookworm

Question 19

20. Snail-transmitted parasites?

Answer 19

Trematodes, “Flukes”

Question 21

21. 2nd IH of flukes (leaf-like)?

Answer 21

Snail
Water vegetation (kang-kong)
Crab
Fish
*IS: metacercaria

Question 22

22. Snail’s flukes?

Answer 22

Echinostoma ilocanum

Question 23

23. Water vegetation’s flukes?

Answer 23

Fasciola species

-“liver flukes”

Question 24

24. Crab’s flukes?

Answer 24

Paragonimus westermani

• “oriental lung flukes”
• -sputum: N-acetyl cystene

Question 25

25. Fish’s flukes?

Answer 25

Clonorchis sinesis, “Chinese liver fluke”
Opis torchis
Heterophyes heterophyes

Question 26

26. Blood flukes?

Answer 26

Schistosoma japonicum (stool)
Schistosoma mansonia (stool)
Schistosoma haematobium (urine)
*IS: Cercaria (motile)