L 24 - CONDENSED Flashcards
True or False: Cestodes (tapeworms) are diecious and have a digestive system
while Nematodes (roundworms) are monecious and lack a digestive system
False
Cestodes
1) monoecious
2) lack digestive system
Nematodes
1) diecious
2) have digestive system
Both T. Solium (pork) and T. Saginata (beef) have radial striation of shell.
However, how do their scolex differ??
T. solium
- 4 suckers
- hooks
- rostellum
- FEW proglottids
T. saginata
- 4 suckers
- NO hooks
- MANY proglottids
2 grooved suckers, a polar knob, and an operculum are features of which cestode (tapeworm)?
A. T. saginata
B. T. solium
C. D. latum
C. D. latum
In Cestodes (tapeworms) both the scolex and proglottids are important for ____
attachment
What are three features to look for to help differentiate between Cestodes (tapeworms)??
1 - Scolex
2 - Eggs
3 - Proglottids
Which three Nematodes (roundworms) are transmitted via ingestion of contaminated soil?
hint: ETA
E. vermicularis
T. trichiura
A. lumbricoids
Which three Nematodes (roundworms) are transmitted via direct skin penetration by infectious larvae?
hint: ANS
A. duodenale
N. americanus
S. stercoralis
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
C. E. vermicularis
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
D. T. trichiura
Which parasites have females form that have long, pointed tails and male forms with curved, blunt posterior ends?
A. E. vermicularis
B. T. trichiura
A. E. vermicularis
______, 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
B. T. trichiura
True or False: For both E. vermicularis and T. trichiura, larvae hatch in the small intestines and migrate to colon
True
True or False: In T. trichiura, adults mature in colon and umembryonate eggs pass via feces
True
In the case of D. latum, T. solium, and T. saginata, who is the definitive host?
A. Animal
B. Human
B. Human
In the case of D. latum, T. solium, and T. saginata, who is the intermediate host?
T. saginata = Cow
T. solium = Pig
D. latum = Fish
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?
T. saginata (cow) and T. solium (pig)