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MICRO > Diarrheal Protozoans (Exam #3) > Flashcards

Diarrheal Protozoans (Exam #3) Flashcards

1
Q

What organism involves trophozoites with 2 nucleus and cysts with 4 nuclei?

A

Giardia lamblia = Giardia

- Diarrheal Protozoan

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2
Q

What Diarrheal Protozoan organism can also be an STI?

A

Giardia lamblia = Giardia

- Diarrheal Protozoan

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3
Q

What organisms involves watery diarrhea, Vitamin B12 deficiency, anorexia due to malabsorption?

A

Giardia lamblia = Giardia

- Diarrheal Protozoan

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4
Q

How is Giardia lamblia = Giardia (Diarrheal Protozoan) diagnosed?

A

GSA-65 on ELISA

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5
Q

Which Diarrheal Protozoan organism involves cyst becomes trophozoite via excystation in the stomach? Which organism involves excystation in the colon?

A
  • Stomach: Giardia lamblia = Giardia

- Colon: Entamoeba histolytica = Amoebiasis

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6
Q

What organism involves trophozoites with 1 nucleus and cysts with 4 nuclei?

A

Entamoeba histolytica = Amoebiasis

- Diarrheal Protozoan

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7
Q

What organism involves bloody diarrhea and ulcers with RUQ pain?

A

Entamoeba histolytica = Amoebiasis

- Diarrheal Protozoan

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8
Q

What are the four virulence factors of Entamoeba histolytica = Amoebiasis (Diarrheal Protozoan)?

A
  • Amoebapore
  • Cysteine proteases
  • Lectin
  • Phospholipases
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9
Q

What organism involves VF of Amoebapore and Cysteine proteases?

A

Entamoeba histolytica = Amoebiasis

- Diarrheal Protozoan

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10
Q

How is Entamoeba histolytica = Amoebiasis (Diarrheal Protozoan) diagnosed?

A

ELISA for E. histolytica (vs. E. dispar)

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11
Q

Which Diarrheal Protozoan organism is REPORTABLE?

A

Entamoeba histolytica = Amoebiasis

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12
Q

What organism involves motile sporozoites and oocysts with 4 nuclei?

A

Cryptosporidium

- Diarrheal Protozoan

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13
Q

What organism involves parasitophorous vacuoles, and how can this help with diagnosis?

A

Cryptosporidium

  • Diarrheal Protozoan
  • Can be visualized = diagnostic
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14
Q

Which Diarrheal Protozoan organism involves both sexual and asexual stages, and what are two characteristics of the oocysts seen with each stage?

A

Cryptosporidium

  • Asexual = THIN-walled, REINFECT host
  • Sexual = THICK-walled, SHED into environment
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15
Q

What is the cardinal symptom of Cryptosporidium (Diarrheal Protozoan)?

A

Watery diarrhea

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16
Q

Which Diarrheal Protozoan organism involves FEW relapses, and why?

A

Cyclosporiasis

- Few relapses because NOT immediately infectious

17
Q

Both Cryptosporidium and Cyclosporiasis (Diarrheal Protozoans) share what diagnostic characteristic? How can you differentiate the two?

A

Both are ACID FAST

- Cyclosporiasis is larger than Cryptosporidium

18
Q

Which Diarrheal Protozoan organism has autofluorescent oocytes?

A

Cyclosporiasis

19
Q

What organism has a large/central vacuole?

A

Blastocystis hominis

- Diarrheal Protozoan

20
Q

What organism involves multiple nuclei around a rim of cytoplasm?

A

Blastocystis hominis

- Diarrheal Protozoan

21
Q

Which Diarrheal Protozoan organism has a macronucleus; possible zoonotic transmission?

A

Balantidium coli

- Diarrheal Protozoan

22
Q

What is the most commonly identified intestinal parasite in the world?

A

Giardia lamblia = Giardia

MICRO (11 decks)

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