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Microbio Test 3 > Parasitic Protozoan > Flashcards

Parasitic Protozoan Flashcards

1
Q

Protozoan

Q

A

A

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2
Q

Protozoan

Four classes of protozoa

A

Amoeba - pseudopodia
Flagellates

Sporozoans - gliding

Ciliates

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3
Q

Protozoan

Protozoa reproduction

A

Asexually, via binary fission

Some can reproduce via schizogony (asexually) or sporogoy (sexually)

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4
Q

Protozoan

Protozoa protection

A

Many produce a cyst form, which prevents damage and aid in transmission

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5
Q

Protozoan

Entamoeba histolytica disease

A

Amebiasis
Dysentery

Fever is rare

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6
Q

Protozoan

Lifecycle of Entamoeba histolytica

A

Excretion of cysts, fecal-oral transmission, activates, then three fates

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7
Q

Protozoan

Three fates of the activated Entamoeba histolytica

A

Remain in lumen
Invade colon wall, then return to lumen

Travels into circulation

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8
Q

Protozoan

Amebiasis transmission (symptomatic vs. asymptomatic)

A

Symptomatic individuals shed more trophozoite form, so transmission is LOW
Asymptomatic individuals shed more cyst form, so transmission is HIGHER

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9
Q

Protozoan

Amebiasis penetration into intestinal wall

A

Flasked-shaped lesion

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10
Q

Protozoan

Amebiasis dissemination

A

Liver abscess

Abdominal pain, fever, elevated WBCs

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11
Q

Protozoan

Amebiasis diagnosis

A

Stool examination or Ag detection

Biopsy and serology

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12
Q

Protozoan

Giardia lamblia disease

A

Giardiasis

Diarrhea, NO dysentery

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13
Q

Protozoan

Giardia life cyle

A

Excretion of cysts, fecal-oral route, excyst in duodenum, binary fission, attach to mucosa of small intestine, NON-INVASIVE

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14
Q

Protozoan

Giardiasis symptoms

A

Sudden onset
Foul smelling, greasy, floating diarrhea

Cramping, bloating, gas

NO dysentery, no fever

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15
Q

Protozoan

Giardiasis diagnosis

A

Observing cysts in formed stools or trophozoites in diarrheal stools

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16
Q

Protozoan

Balantidium coli disease

A

Balantidiasis

17
Q

Protozoan

Balantidium coli life cycle

A

Excretion of cysts, fecal-oral, remain in lumen or invade intestinal wall (return to lumen)

18
Q

Protozoan

Balantidiasis symptoms

A

Generally asymptomatic
Chronic can result in alternating diarrhea and constipation

Acute (invasion) results in dysentery

19
Q

Protozoan

Cryptosporidium parvum disease

A

Cryptosporidiosis

20
Q

Protozoan

Cryptosporidiosis life cycle

A

Excretion of mature oocyst, fecal-oral, sporozoites attach to intestinal epithelium and matures (schizogony), gametogony is produced, produces more oocysts

21
Q

Protozoan

Cryptosporidiosis symptoms

A

Profuse, watery diarrhea accompanied by cramping, fatigue, and weight loss
NO blood in stools

22
Q

Protozoan

Cryptosporidiosis diagnosis

A

Detection of acid-fast oocyst in stool

23
Q

Protozoan

Isospora belli life cycle

A

Excretion of immature oocyst with sporocyst, sporozoites divide and mature in intestinal mucosal cells, gametogomy produces fertilized oocyst

24
Q

Protozoan

Isospora belli symptoms

A

Increasingly present in immunocompromised
Fever, diarrhea, weight loss

Severe in AIDS patients

25
Q

Protozoan

Cyclospora life cycle

A

Excretion of unsporulated oocyst, environmental contamination, sporulation occurs in the environment, ingestion, reproduction, produce unsporulated oocyst

26
Q

Protozoan

Cyclospora diagnosis

A

Fluorescent under UV light

27
Q

Protozoan

Cyclospora symptoms

A

Profuse, watery diarrhea
Cramping, fatigue, weight loss

Prolonged (weeks)

Severe in AIDS patients

28
Q

Protozoan

Microsporidia disease

A

Microsporidiosis

29
Q

Protozoan

Microsporidia features

A

Obligate intracellular parasites
Primitive

Spore-forming

Intestinal disease or dissemination

30
Q

Protozoan

Microsporidia intestinal symptoms

A

Chronic, debilitating diarrhea, anorexia, weight loss

31
Q

Protozoan

Microsporidia disseminated symptoms

A

Keratoconjunctivitis

Can be involved in any organ system

Microbio Test 3 (14 decks)

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