Trematodes Flashcards Preview

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Flashcards in Trematodes Deck (37):
0

Trematodes:
- appearance

Leaf-like and flat (Platyhelminths)

1

Trematodes:
- definitive host for all organisms

Human (or another animal) is definitive host for all

2

Trematodes:
- how many intermediate host generally

Two intermediate hosts for most (schistosomes have one)

3

Trematodes:
- diagnostic stage

Egg

4

Trematodes:
- what method is not effective for detection

Floatation methods

5

Trematodes:
- Life cycle

- eggs shed from humans into freshwater
- larvae infect snails
- larvae leaves snail and invades ??? which is ingested by man

6

Fasciolopsis buski:
- what type

Intestinal fluke

7

Fasciolopsis buski:
- size

Giants intestinal fluke (largest Trematode human pathogen)

8

Fasciolopsis buski:
- where is it found

South east Asia

9

Fasciolopsis buski:
- what is it's (???) intermediate host

Water plants, e.g. water chestnut or bamboo shoots

10

Fasciolopsis buski:
- clinical manifestation

G.I. obstruction with heavy infections, edema, malabsorption

11

Fasciolopsis buski:
- microscopic appearance of eggs

Very large, operculate, can't be differentiated from eggs of fescue Fasciola hepatica

12

Fasciola hepatica:
- what type

Liver fluke

13

Fasciola hepatica:
- what is it's (???) intermediate

Fresh water plants, e.g. watercress

14

Fasciola hepatica:
- clinical manifestation

Causes major destruction, fibrosis, partial obstruction bile ducts

15

Clonorchis sinensis:
- other name

Opisthorchis spp.

16

Clonorchis sinensis/ Opisthorchis spp:
- what type

Oriental or Chinese liver fluke

17

Clonorchis sinensis:
- endemic to where

Orient (imported fish to Hawaii)

18

Clonorchis sinensis:
- what is it's (???) intermediate

Freshwater fish (raw, smoked, pickled or dried)

19

Clonorchis sinensis:
- clinical manifestations

Pain, bile duct obstruction, jaundice, (associated with liver/gallbladder carcinoma)

20

Clonorchis sinensis:
- microscopic egg appearance

Operculate, flask shaped eggs found in stool (shoulders; tiny in size)

21

Paragonimus westermani:
- what type

Oriental lung fluke

22

Paragonimus westermani:
- what is it's (???) second intermediate host

In crabs or crayfish

23

Paragonimus westermani:
- clinical manifestation

Chronic cough, hemoptysis ("Iron filings"), pulmonary fibrosis, resembles TB

24

Paragonimus westermani:
- microscopic egg appearance

Operculate eggs in sputum, often shoulders, aboperculate thickening but no knob

25

Schistosoma species:
- name the three species

S. japonicum
S. hematobium
S. mansoni

26

Schistosoma species:
- life cycle

When the larvae leave the snail, they penetrate human skin; large eggs are deposited in vessels of humans

27

Schistosoma species:
- clinical manifestations

Local irritation at penetration site; major symptoms dependent on fluke's life cycle

28

S. japonicum:
- where is it found

South east Asia

29

S. japonicum:
- where does it deposit its eggs

G.I. tract

30

S. japonicum:
- egg appearance

Rounded, small lateral spine (no operculate)

31

S. hematobium:
- where is it found

Africa, middle east

32

S. hematobium:
- where are eggs deposited in humans

Urinary bladder (bladder cancer)

33

S. hematobium:
- egg appearance

Elongated, pointed terminal spine (no operculum)

34

S. mansoni:
- where are they found

Africa, South America, Caribbean

35

S. mansoni:
- where are eggs deposited in humans

G.I. tract

36

S. mansoni:
- egg appearance

Elongated, long pointed lateral spine (no operculum)