35. Parasites

Question 1

A 34 year old multigravida is brought to a community clinic in Indonesia she has been suffering from persistent GI issues. A parasitic organism is located in her and is noted for its lack of a digestive system. Which of the listed organisms fits this description.

A.Fasciolopsis buski
B. Taenia Saginata 
C.Toxocara 
D. Enterobius 
E. S. Japonicum 

RFA

Answer 1

Ans. B Taenia Saginata. Cestodes do not have a digestive system they absorb nutrients directly into proglottides and scoleces

A. & E are Trematodes & have incomplete or dead end digestive systems

C & D are Nematodes and have complete digestive systems.

Question 2

You have won an all expenses paid trip to Morocco. You start learning all you can and are excited to buy a Fez and eat B’stilla but you also learn that during the summers sand flies become a common nuisance. Which parasite do you have a danger of contracting on your trip to Morocco?

A. Plasmodium 
B. Leishmania 
C. Trypanosoma 
D. Toxoplasma gondii
E. Trichomonas Vagninalis 

RFA

Answer 2

Ans. B. Leishmania is transmitted by the sandfly

A. Plasmodium- is the caustive agent of malaira and is transmitted by the Anopheles mosquito

C. Trypanosoma has two variants
one if africa causing sleeping sickness transmitted by the Tsetse fly and other in South America causing Chaga’s trasmitted by the Reduviid bug

D. Toxoplasma gondii is transmitted by cat faeces so guess you can get it if you like eating Moraccan cat poop

E. Trichomonas Vaginalis is transmitted by sexaully intercourse so unless you plane on have dirty dirty unprotected sex in Morocco you should be good.

Question 3

Which of the following is a characteristic of intestinal protozoa life cycle’s trophozoite form?

A. Non motile
B. Resistant to hostile environment
C. Does not multiple
D. Metabolically active

SZ

Answer 3

Ans D. Metabolically active

Trophozoites are the mature form of protozoa and are metabolically active. However, they cannot live long outside the host.

The other answer choices are characteristics of cyst/oocyst forms that are active in the intestines.

Question 4

A 22 year male presents to your office with complaints of bloating, flatulence, and foul-smelling fatty diarrhea. He was camping over the weekend and ingested stream water without properly boiling or filtering it. Which of the following was most likely in the water causing his diarrhea?

A. Cysts
B. Oocysts
C. Nematodes
D. Mosquitos
E. Cestodes 

SZ

Answer 4

Ans A. Cysts

The patient has the GI protozoa Giardia lamblia, ‘hikers diarrhea.’ It is caused by ingesting water with cysts in it. (Note: this is NOT written on the slides but he stated this in the lecture….eye roll)

Oocytes in water are a characteristic of crytosporidium which causes severe diarrhea in immunocompromised patients, such as HIV positive patients.