L 24 - CONDENSED

Question 1

True or False: Cestodes (tapeworms) are diecious and have a digestive system

while Nematodes (roundworms) are monecious and lack a digestive system

Answer 1

False

Cestodes
1) monoecious
2) lack digestive system

Nematodes
1) diecious
2) have digestive system

Question 2

Both T. Solium (pork) and T. Saginata (beef) have radial striation of shell.

However, how do their scolex differ??

Answer 2

T. solium
- 4 suckers
- hooks
- rostellum
- FEW proglottids

T. saginata
- 4 suckers
- NO hooks
- MANY proglottids

Question 3

2 grooved suckers, a polar knob, and an operculum are features of which cestode (tapeworm)?
A. T. saginata
B. T. solium
C. D. latum

Answer 3

C. D. latum

Question 4

In Cestodes (tapeworms) both the scolex and proglottids are important for ____

Answer 4

attachment

Question 5

What are three features to look for to help differentiate between Cestodes (tapeworms)??

Answer 5

1 - Scolex
2 - Eggs
3 - Proglottids

Question 6

Which three Nematodes (roundworms) are transmitted via ingestion of contaminated soil?

hint: ETA

Answer 6

E. vermicularis
T. trichiura
A. lumbricoids

Question 7

Which three Nematodes (roundworms) are transmitted via direct skin penetration by infectious larvae?

hint: ANS

Answer 7

A. duodenale
N. americanus
S. stercoralis

Question 8

Which of the following is associated with non-diarrheal, non-invasive, parasitic infection?
A. T. solium
B. D. latum
C. E. vermicularis
D. T. trichiura

Answer 8

C. E. vermicularis

Question 9

Which of the following is associated with non-diarrheal, minimally invasive parasitic infections?
A. T. solium
B. D. latum
C. E. vermicularis
D. T. trichiura

Answer 9

D. T. trichiura

Question 10

Which parasites have females form that have long, pointed tails and male forms with curved, blunt posterior ends?
A. E. vermicularis
B. T. trichiura

Answer 10

A. E. vermicularis

Question 11

______, also known as the whipworm, have male forms that are coiled at posterior end and female forms with bluntly rounded posterior.

Also have yellow-brown, barrel shaped, ova

A. E. vermicularis
B. T. trichiura

Answer 11

B. T. trichiura

Question 12

True or False: For both E. vermicularis and T. trichiura, larvae hatch in the small intestines and migrate to colon

Answer 12

True

Question 13

True or False: In T. trichiura, adults mature in colon and umembryonate eggs pass via feces

Answer 13

True

Question 14

In the case of D. latum, T. solium, and T. saginata, who is the definitive host?
A. Animal
B. Human

Answer 14

B. Human

Question 15

In the case of D. latum, T. solium, and T. saginata, who is the intermediate host?

Answer 15

T. saginata = Cow

T. solium = Pig

D. latum = Fish

Question 16

Which two worm parasites have a life cycle in which an animal ingests an embryonated egg, human eats that animal (and stomach acid releases cysticerci) + worms mature/grow in small intestines, with proglottids passing out in the feces?

Answer 16

T. saginata (cow) and T. solium (pig)

Question 17

The larvae of ____ hatch in water. Where does the gravid proglottid break up? Why might you see eggs in feces?

Answer 17

D. latum; colon; because proglottid not intact

Question 18

Pernicious anemia is a side effect of infection by which microbe?
A. D. latum
B. T. solium
C. T. trichiura
D. E. vermicularis

Answer 18

A. D. latum

Question 19

While Cysticercosis is a disease manifestation of both T. solium and T. saginata, Taeniasis is associated with ______
A. T. solium
B. T. saginata

Answer 19

A. T. solium

Question 20

Occulo or Neurocysticercosis is a disease manifestation associated with…
A. T. solium
B. T. saginata

Answer 20

A/B

Question 21

True or False: Embryonated EGGS are a disease manifestation associated with T. saginata and solium

Answer 21

True

Question 22

How do you diagnose T. saginata or T. solium?
A. Proglottid or ova in fecal sample
B. Ova in stool
C. Tape test
D. Mature worms in intestines

Answer 22

D. Mature worms in intestines

Question 23

True or False: Autoinfection of Retroinfection are associated with D. latum

Answer 23

False - with E. vermicularis

Question 24

Rectal Prolapse and Dysentary as symptoms that are most closely associated with which helminth?
A. T. trichiura
B. D. latum
C. T. saginata/solium

Answer 24

A. T. trichiura

Question 25

Name the three soil-transmitted helminths:

Answer 25

1) Trichuris 2) Ascaris 3) Hookworm - note: all of these have eggs that need to embryonate in the soil

Question 26

Which four parasites are non-diarrheal, invasive parasites? Hint: AANS

Answer 26

A. duodenale (hookworm) A. lumbricoides N. americanus (hookworm) S. stercoralis

Question 27

How do you dx A. Lumbricoides? A. Ova in feces B. Eggs in stool C. Larvae in stool

Answer 27

A. Ova in feces

Question 28

How do you dx hookworms (A. duodenale and N. americanus)??? A. Ova in feces B. Eggs in stool C. Larvae in stool

Answer 28

B. Eggs in stool

Question 29

True or False: To diagnose S. stercoralis, you must identify LARVAE in stool

Answer 29

True

Question 30

Which of the following non-diarrheal, invasive, parasitic infections alter between free living and parasitic life cycles + is associated with watery diarrhea/cramps? A. A. Lumbricoides B. A. Duodenale C. N. Americanus D. S. Stercoralis

Answer 30

D. S. Stercoralis

Question 31

Which two non-diarrheal, invasive parasitic infections penetrates human skin and are carried through blood vessels to heart and lungs?

Answer 31

A. duodenale and N. americanus

Question 32

True or False: A. lumbricoides and A. duodenale are associated with anemia and protein deficiency

Answer 32

False - the hookworms (A. duodenale and N. americanus) are associated with anemia and protein deficiency

Question 33

True or False: Adult A. duodenale and N. americanus live in small intestine, but can eventually enter heart, lungs, and trachea

Answer 33

True

Question 34

Cough or pneumonitis are associated with infection by.... A. A. lumbricoides B. A. duodenale C. S. stercoralis D. N. americanus

Answer 34

A. A. lumbricoides

Question 35

Which non-diarrheal, invasive parasite matures in lungs, then ascends up bronchial tree to the throat, and is swallowed. Once in the intestines, it attaches and invades. A. A. lumbricoides B. A. duodenale C. S. stercoralis D. N. americanus

Answer 35

A. A. lumbricoides

Question 36

True or False: A. duodenale has motor cutting plates while N. americanus has motor cutting teeth

Answer 36

True

Question 37

What are the three larvae forms of the hookworms (A. duodenate and N. americanus)? Which is infective form?

Answer 37

1) Embryonate 2) Rhabditiform* 3) Filariform

Question 38

What are the two larval forms of S. stercoralis?

Answer 38

1) Rhabditiform 2) Filariform*

Question 39

True or False: S. stercoralis can either have internal or external autoinfection

Answer 39

True

Question 40

Which larave form of S. stercoralis is found in contaminated soil and penetrates human skin; it can either enter lungs, bronchial tree, pharynx, small intestines, or disseminate throughout? A. A. lumbricoides B. A. duodenale C. S. stercoralis D. N. americanus

Answer 40

C. S. stercoralis

Question 41

True or False: Cutaneous Larva Migrans is a zoonotic hookworm that can migrate through skin and cause inflammation

Answer 41

True