Micro 6 Parasites Flashcards

1
Q

Protozoa associated with water contamination outbreak

A

Cryptosporidium parvum

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2
Q

Entamoeba histolytica lifecycle

A

Trophozites replicate in intestine, encystation in colon, reingestion, excystation in gastric acid

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3
Q

Entamoeba histolytica pathology

A
  • Afebrile dysentery (blood) or watery diarrhea
  • Abscess in liver or brain
  • Ulcer
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4
Q

Amebiasis risk

A

Poor sewage countries

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5
Q

E. histolytica Dx

A
  • Microscopy of stools
  • Serology
  • CT for abscess
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6
Q

E. histolytica appearance

A

Gooey or cyst

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7
Q

Amebiasis ddx

A

MUCUS and blood in stool
No granulocytosis
No fever

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8
Q

Tx for all parasites

A
  • Metronidazole for E. histolytica & G. lamblia

- Nitazoxanide for C. parvum

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9
Q

Giardia lamblia lifecycle

A

Same as ameba

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10
Q

Giardia lamblia risk

A

Beavers and Dogs

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11
Q

Giardia lamblia appearance

A

Ghost or cyst

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12
Q

Giardiasis ddx

A
  • Watery diarrhea (no mucus, blood, PMN, fever)

- Flatulence, stinky greasy stools (malabsorption), lactose intolerance

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13
Q

Giardiasis Dx

A

ELISA antigen test, stool microscopy

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14
Q

Cryptosporidium parvum lifecycle

A

Same

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15
Q

Cryptosporidium parvum risk

A

Cows, anal sex, AIDS

-Chlorine resistant

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16
Q

Cryptosporidium Dx

A

ELISA, fluorescent microscopy

17
Q

Roundworm name, location, & path

A
  • Ascaris lumbricoides
  • Small intestine
  • Intestinal obstruction
18
Q

Hookworm name, location, & path

A
  • Ancylostoma duodenale, Necator americanus
  • Small intestine
  • Anemia
19
Q

Threadworm name, location, & path

A
  • Strongyloides stercoralis
  • Small intestine
  • Anaphylactic shock (autoinfection)
20
Q

Whipworm name, location, & path

A
  • Trichuris trichiura
  • Colon
  • Anal prolapse
21
Q

Fish tape worm name, location, & path

A
  • Diphyllobothrium latum
  • Small intestine
  • Macrocytic anemia (B12)
22
Q

Worms that enter through skin

A
  • Hookworm (ancylostoma & necator)

- Threadworm (strongyloides)

23
Q

Ascaris egg

A

Corticated & pigmented (thick and dark)

24
Q

Ascaris lumbricoides outside of intestine

A

Lung lifecycle

25
Q

Ancylostoma egg

A

Thin-walled multi-cell (looks wet)

26
Q

Ancylostoma outside of intestine

A
  • Lungs

- Chew out, suck blood

27
Q

Strongyloides egg

A

Look for larvae instead

28
Q

Storngyloides outside the intestine

A

Filariform larvae thread back into skin, follow lung lifecycle, turn into Rhabditiform larvae

29
Q

Trichuris egg

A

Thick-walled oval with polar hyaline plug

30
Q

Trichuris outside the intestine

A

Whip out the prolapse

31
Q

Cysticercosis tape worm

A

Taenia solium (pork)

32
Q

Broad/Fish tape worm

A
  • Diphyllobothrium latum
  • B12 deficiency
  • Scolex bites your shit