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Clinical Laboratory Techniques > Protozoa > Flashcards

Protozoa Flashcards

1
Q

Protozoa

A

Protozoan = Singular

Protozoans/ Protozoa = plural

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2
Q

Characteristics of Protozoa

A

Unicellular (one-celled) organisms
Eukaryotic (true nucleus)
Infect a variety of Tissue sites

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3
Q

Protozoa that infect blood are called what?

A

Hemoprotozoa

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4
Q

Protozoans that infect feces are called what?

A

Intestinal protozoa

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5
Q

What is the intermediate host of protozoa?

A

Ticks

Especially hemoprotozoa

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6
Q

What are the two stages of protozoa?

A

Trophozoites

Cysts

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7
Q

Trophozoites

A

Motile
Feeding stage
Fragile

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8
Q

Cysts

A

The reproductive version of an ova or egg

Can survive in harsh conditions

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9
Q

How do protozoa reproduce?

A

Asexually or sexually

Individuals are hermaphroditic

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10
Q

What are some of the diseases a protozoal infection cause in humans?

A 
Malaria
Giardiasis
Toxoplasmosis 
Cryptosporidiosis 
Chagas disease
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11
Q

How do we classify protozoa?

A

By the organelles used for locomotion

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12
Q

Flagella

A

Long whiplike structure

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13
Q

Cilia

A

Short flagella arranged in rows or tufts

“Fingers”

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14
Q

Pseudopodia

A

Temporary extensions and retractions of the body wall

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15
Q

Undulatory ridges

A

Small snakelike waves that form in the cell membrane and move posteriorly

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16
Q

What is the prepatent period for Giardia?

A

5-7 days

17
Q

How do you diagnosis giardia?

A

Fecal float
direct smear
Fecal antigen SNAP Test

18
Q

What does a fecal float help identify when looking for Giardia?

A

Cysts

Can stain with Lugol’s iodine

19
Q

What does a direct smear help diagnosis when looking for Giardia spp?

A

Trophozoites

20
Q

Fecal antigen SNAP test?

A

Antigen looks for protein from Giardia

21
Q

Is Giardia reinfection common?

A

Yes

Bathe during treatment to help

22
Q

Is zoonosis possible with Giardia?

A

Yes. Humans get it from other humans

Not usually from dogs or cats

23
Q

What does the trophozoite Giardia look like?

A 
Pear shaped
Dorsoventrally flattened 
Four pairs of flagella
Two nuclei resemble a pair of eyes
Use 40x
24
Q

What does the cyst Giardia look like?

A

Oval with a slit on the inside

Use 40x

Clinical Laboratory Techniques (45 decks)

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