Parasitic Infections

Question 1

Generally parasitic infections are _ and _, although sometimes they are profoundly serious, especially in immunocompromised patients

Answer 1

long ; chronic

Question 2

They are _, _, and lack a cell wall

Answer 2

eukaryotic, unicellular

Question 3

When do we suspect a parasitic infection?

Answer 3

after traditional therapies have failed

Question 4

Many protozoa revert to a hardy, dormant _ stage, to protect the parasite from poor environmental factors (infective form)

Answer 4

cyst

Question 5

People become symptomatic at the _ phase

Answer 5

trophozoite

Question 6

What are four sites of parasite infection?

Answer 6

GI tract, urogenital tract, blood, tissues

Question 7

_; move by extending cytoplasmic projections outward from main body

Answer 7

amoebas

Question 8

_; whip-like projections rotate and propel the organism

Answer 8

flagellates

Question 9

_; hair-like projections cover cell-surface and beat in unison to move cell forward

Answer 9

ciliates

Question 10

_; generally non-motile, although adult males sometimes have flagella

Answer 10

sporozoan

Question 11

Protozoa typically reproduce through _ (binary fissions), some reproduce by _ (sexual division)

Answer 11

asexual ; meiotic

Question 12

Many have a complex life cycle that includes a _ (i.e. mosquito, rats) or _ (i.e. snails, pigs, beef, fish)

Answer 12

vector ; intermediate host

Question 13

Protozoa typically gain access to human host via _ or _ of anatomical barrier, followed by attachment, _, and host damage as organism is released from host tissue

Answer 13

ingestion ; penetration ; replication