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)
The larvae of ____ hatch in water. Where does the gravid proglottid break up? Why might you see eggs in feces?
D. latum; colon; because proglottid not intact
Pernicious anemia is a side effect of infection by which microbe?
A. D. latum
B. T. solium
C. T. trichiura
D. E. vermicularis
A. D. latum
While Cysticercosis is a disease manifestation of both T. solium and T. saginata, Taeniasis is associated with ______
A. T. solium
B. T. saginata
A. T. solium
Occulo or Neurocysticercosis is a disease manifestation associated with…
A. T. solium
B. T. saginata
A/B
True or False: Embryonated EGGS are a disease manifestation associated with T. saginata and solium
True
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
D. Mature worms in intestines
True or False: Autoinfection of Retroinfection are associated with D. latum
False - with E. vermicularis
Rectal Prolapse and Dysentary as symptoms that are most closely associated with which helminth?
A. T. trichiura
B. D. latum
C. T. saginata/solium
A. T. trichiura
Name the three soil-transmitted helminths:
1) Trichuris
2) Ascaris
3) Hookworm
- note: all of these have eggs that need to embryonate in the soil
Which four parasites are non-diarrheal, invasive parasites?
Hint: AANS
A. duodenale (hookworm)
A. lumbricoides
N. americanus (hookworm)
S. stercoralis
How do you dx A. Lumbricoides?
A. Ova in feces
B. Eggs in stool
C. Larvae in stool
A. Ova in feces
How do you dx hookworms (A. duodenale and N. americanus)???
A. Ova in feces
B. Eggs in stool
C. Larvae in stool
B. Eggs in stool
True or False: To diagnose S. stercoralis, you must identify LARVAE in stool
True
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
D. S. Stercoralis
Which two non-diarrheal, invasive parasitic infections penetrates human skin and are carried through blood vessels to heart and lungs?
A. duodenale and N. americanus
True or False: A. lumbricoides and A. duodenale are associated with anemia and protein deficiency
False - the hookworms (A. duodenale and N. americanus) are associated with anemia and protein deficiency
True or False: Adult A. duodenale and N. americanus live in small intestine, but can eventually enter heart, lungs, and trachea
True
Cough or pneumonitis are associated with infection by….
A. A. lumbricoides
B. A. duodenale
C. S. stercoralis
D. N. americanus
A. A. lumbricoides
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
A. A. lumbricoides
True or False: A. duodenale has motor cutting plates while N. americanus has motor cutting teeth
True
What are the three larvae forms of the hookworms (A. duodenate and N. americanus)? Which is infective form?
1) Embryonate
2) Rhabditiform*
3) Filariform
What are the two larval forms of S. stercoralis?
1) Rhabditiform
2) Filariform*
True or False: S. stercoralis can either have internal or external autoinfection
True
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
C. S. stercoralis
True or False: Cutaneous Larva Migrans is a zoonotic hookworm that can migrate through skin and cause inflammation
True
