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Mycology > Trematodes > Flashcards

Trematodes Flashcards

0
Q

Trematodes:

- definitive host for all organisms

A

Human (or another animal) is definitive host for all

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1
Q

Trematodes:

- appearance

A

Leaf-like and flat (Platyhelminths)

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2
Q

Trematodes:

- how many intermediate host generally

A

Two intermediate hosts for most (schistosomes have one)

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3
Q

Trematodes:

- diagnostic stage

A

Egg

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4
Q

Trematodes:

- what method is not effective for detection

A

Floatation methods

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5
Q

Trematodes:

- Life cycle

A
  • eggs shed from humans into freshwater
  • larvae infect snails
  • larvae leaves snail and invades ??? which is ingested by man
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6
Q

Fasciolopsis buski:

- what type

A

Intestinal fluke

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7
Q

Fasciolopsis buski:

- size

A

Giants intestinal fluke (largest Trematode human pathogen)

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8
Q

Fasciolopsis buski:

- where is it found

A

South east Asia

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9
Q

Fasciolopsis buski:

- what is it’s (???) intermediate host

A

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

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10
Q

Fasciolopsis buski:

- clinical manifestation

A

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

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11
Q

Fasciolopsis buski:

- microscopic appearance of eggs

A

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

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12
Q

Fasciola hepatica:

- what type

A

Liver fluke

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13
Q

Fasciola hepatica:

- what is it’s (???) intermediate

A

Fresh water plants, e.g. watercress

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14
Q

Fasciola hepatica:

- clinical manifestation

A

Causes major destruction, fibrosis, partial obstruction bile ducts

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15
Q

Clonorchis sinensis:

- other name

A

Opisthorchis spp.

16
Q

Clonorchis sinensis/ Opisthorchis spp:

- what type

A

Oriental or Chinese liver fluke

17
Q

Clonorchis sinensis:

- endemic to where

A

Orient (imported fish to Hawaii)

18
Q

Clonorchis sinensis:

- what is it’s (???) intermediate

A

Freshwater fish (raw, smoked, pickled or dried)

19
Q

Clonorchis sinensis:

- clinical manifestations

A

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

20
Q

Clonorchis sinensis:

- microscopic egg appearance

A

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

21
Q

Paragonimus westermani:

- what type

A

Oriental lung fluke

22
Q

Paragonimus westermani:

- what is it’s (???) second intermediate host

A

In crabs or crayfish

23
Q

Paragonimus westermani:

- clinical manifestation

A

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

24
Q

Paragonimus westermani:

- microscopic egg appearance

A

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

25
Q

Schistosoma species:

- name the three species

A

S. japonicum
S. hematobium
S. mansoni

26
Q

Schistosoma species:

- life cycle

A

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

27
Q

Schistosoma species:

- clinical manifestations

A

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

28
Q

S. japonicum:

- where is it found

A

South east Asia

29
Q

S. japonicum:

- where does it deposit its eggs

A

G.I. tract

30
Q

S. japonicum:

- egg appearance

A

Rounded, small lateral spine (no operculate)

31
Q

S. hematobium:

- where is it found

A

Africa, middle east

32
Q

S. hematobium:

- where are eggs deposited in humans

A

Urinary bladder (bladder cancer)

33
Q

S. hematobium:

- egg appearance

A

Elongated, pointed terminal spine (no operculum)

34
Q

S. mansoni:

- where are they found

A

Africa, South America, Caribbean

35
Q

S. mansoni:

- where are eggs deposited in humans

A

G.I. tract

36
Q

S. mansoni:

- egg appearance

A

Elongated, long pointed lateral spine (no operculum)

Mycology (24 decks)

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