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Path Exam II > Parasites pt 1 Entamoeba Histolytica to Balamuthia Fig 31-12 > Flashcards

Parasites pt 1 Entamoeba Histolytica to Balamuthia Fig 31-12 Flashcards

1
Q

the carrier is asymptomatic

Protozoa
transmission
morphology
Clinical findings

A

amoeba
entamoeba histolytica

transmitted oral-fecal

morphology: amoeba, oocyst, trophozoite (motile, bulls eye shaped nucleus with red blood cells in the cytoplasm)
clinical: most are asymptomatic. active infection: liver abscesses and bloody diarrhea. abscesses in lungs.

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2
Q

Entamoeba histolytica
how to diagnose
epi

A

1) fecal exam: look for cysts and trophozoites with RBCs in their cytoplasm (indicates active infection)
2) serology
3) abdominal CT scan: liver abcesses

90% of ppl with Entamoeba Histolytica are asymptomatic carriers

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3
Q

liver abscesses

A

entamoeba histoltyica

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4
Q

motile bulls eye shaped nucleus with red blood cells in cytoplasm

A

entamoeba histolytica

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5
Q

foul smelling, greasy diarrhea

A

giardia lamblia

NO BLOOD IN DIARRHEA

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6
Q

flagellated trophozoite, found in feces on exam

A

giardia lamblia

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7
Q

contaminated fruits and vegetables

A

carry the oocysts of cyclospora cayetanesis.

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8
Q

cyclospora cayetanesis: clinical

A

water diarrhea, nausea and vomiting

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9
Q

cyclospora cayetanesis: morphology

A

oocysts

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10
Q

cyclospora cayetanesis: diagnosis

A

stool exam reveals oocysts that fluoresce under UV light and are acid fast

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11
Q

acid fast oocysts found in strawberries

A

cyclospora cayetanesis

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12
Q

cryptosporidium: morphology and life cycle

A
  1. oocysts: infective agent
    they contain 4 sporozoites
    life cycle occurs within epithelial cells
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13
Q

watery diarrhea, vomiting, abdominal pain that is self limiting

A

cryptosporidium

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14
Q

you would do a biopsy on the small intestine for this protozoa

A

cryptosporidium

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15
Q

transmitted fecal-orally, fecal matter has oocysts, obligate intracellular parasite, and life cycle occurs within epithelial cells

A

cryptosporidium

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16
Q

Isospora species: morphology

A

oocyst is infective agent: contains 8 sporozoites

17
Q

severe diarrhea and causes malabsorption in aids patients

A

isospora species

18
Q

obligate intracellular parasite, presence of Eosinophils, and contains 8 sporozoites

A

isospora species

19
Q

acid fast and causes malabsorption in AIDs patients

A

isospora species

20
Q

Trichomonas vaginalis: transmission and morphology

A

sexually transmitted. no cyst stage, but flagellated trophozoite

21
Q

yellow-green malodorous, frothy vaginal discharge

A

trichomonas vaginalis

22
Q

PAINFUL vaginal itching, burning on urination

A

tichomonas vaginalis

23
Q

these flagellated parasites can be seen in the urine

A

trichomonas vaginalis

24
Q

these flagellated parasites can be seen in vaginal discharge

A

trichomonas vaginalis

25
Q

Naegleria fowleri: transmission, morphology, clinical findings

A

lives in freshwater lakes, amoeba, acute meningitis (usually fatal in one week)

26
Q

you do a CSF exam and find motile amoeba along with white blood cells

A

Naegleria fowleri

27
Q

lives in freshwater lakes and causes acute meningitis

A

naegleria fowleri

usually death occurs within a week.

28
Q

two protozoa that common infect aids patients

A

isospora and cryptosporidum

29
Q

acanthamoeba: clinical

A

CHRONIC meningocephalitis in immunocompromised hosts

corneal infection. diagnosed by skin scaping

30
Q

acanthamoeba: morphology

A

cysts AND mature amoeba found in the brain

tissue

31
Q

where are the mature naegleria amoeba found?

A

only in brain tissue: NO CYSTS

32
Q

corneal infections in naegleria, acanthamoeba, balamuthia mandrillaris

A

Naegleria: no corneal infection
Acanthamoeba: corneal infection
Balamuthia: no corneal infection

33
Q

cysts/amoeba in balamuthia mandrillaris

A

mature amoeba AND cysts found in brain tissue

34
Q

Acanthamoeba species: transmission

A

lives in fresh water, eye infections from dirty contact lenses

35
Q

acanthamoeba species: morphology

A

amoeba and cyst stage both present in brain tissues

36
Q

acanthamoeba: clinical

A

chronic granulomatous brain infection. fatal within a year.

corneal infection often associated with sue of dirty contact lenses.

37
Q

acanthamoeba: making the diagnosis,

A

examination of CSF and brain tissue. reveals both cysts and mature trophozoites
examination of corneal scrapings

38
Q

balamuthia mandrilaris: transmission, morphology, clinical

A

lives in fresh water and soil
amoeba stage
cyst stage in brain
chronic, granulomatous brain infection

granulomatous skin infections!!!!!!!!!!!!!!

39
Q

diagnosing balamuthia mandrillaris

q: who is susceptible?

A

examination of brain tissue for cysts and trophozoites. skin biopsy, immunofluorescent staining.

both immunocompromised and immunocompetent are susceptible

Path Exam II (7 decks)

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