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PARA LEC PRELIM > PROTOZOA > Flashcards

PROTOZOA Flashcards

(50 cards)

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1
Q

Non-motile, Non-Feeding stage, Resistant to acid

A

Cyst

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2
Q

Motile, Feeding stage, Fragile

A

Trophozoite

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3
Q

What are the 3 stages of reproduction

A

Excystation, Encystation, Binary Fission

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4
Q

development/morphologic conversion of trophozoite into cyst

A

Encystation

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5
Q

mode of reproduction of trophozoite

A

Binary fission

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6
Q

development/morphologic conversion of cyst into trophozoite

A

Excystation

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7
Q

General characteristics of protozoa include

A
  • unicellular
  • motile
  • vary in shape
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8
Q

Parts of cytoplasm

A
  • ectoplasm
  • endoplasm
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9
Q

infective stage

A

Cyst

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10
Q

Most important part of protozoa

A

Protoplasm

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11
Q

sexual reproduction

A

syngamy

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12
Q

asexual reproduction

A

binary fission

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13
Q

example of commonly amoeba

A

Subphylum darcodina

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14
Q

consider as the only pathogenic intestinal amoeba

A

Entamoeba histolytica

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15
Q

What is the infective stage or form of Entamoeba histolytica?

A

quadrinucleated cyst

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16
Q

What are the characteristics of cyst

A

*spherical shaped
*12-15 um
*4 nuclei (mature)
*Cytoplasm may contain blunt chromatoid bodies
*Phagocytosed erythrocytes (RBC)

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17
Q

What is the mode of transmission for E.H (cyst)

A

feco-oral
male homosexual
Ingestion

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18
Q

Characteristics of E.H (trophozoite)

size -
nucleus -
cytoplasm -
chromatin -
karyosome -

A

*pseudopodia with clear ectoplasm
* Size 12-30 micrometers
* Nucleus is hardly visible
*Cytoplasm may contain purple-colored,
ingested red cells
* A single nucleus contains reddish,
concentric karyosome, and peripheral
chromatin evenly distributed

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19
Q

Characteristics of E.H (cyst)

size -
nucleus -
cytoplasm -
chromatin -
karyosome -

A
  • Immature, binucleated cyst in stool specimen (1-4 nucleus)
    Trichrome stained
  • Spherical or ovoidal in shape, 12-20 micrometer in diameter
  • Cytoplasm contains reddish-purple colored, cigar-shaped chromatoid bars
  • Each nucleus contains reddish, concentric
    karyosome, and peripheral chromatin evenly distributed
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20
Q

Used for observation of trophozoite

A
  • saline wet mount
  • natural saline solution
  • Iodine wet mount
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21
Q

stained used in E.H cyst

22
Q

What are the two forms of amoebiasis

Study These Flashcards
A
  • non-invasive
  • invasive
23
Q

asymptomatic cyst passer/carrier

24
Q

extraintestinal amebiasis

25
severe dysentery, colitis, peritonitis
ulcer enlargement
26
two types of amoebiasis
- symptomatic intestinal amoebiasis - asymptomatic extraintestinal amoebiasis
27
What is the first stage of symptomatic intestinal amoebiasis
Amoebic colitis
28
second stage of symptomatic intestinal amoebiasis. characterized by bloody diarrhea
amoebic dysentery
29
may infect lungs
amoebic pneumonitis
30
Worldwide, with higher incidence of amoebiasis in developing countries
Geographical distribution
31
Geographical distribution
industrialized countries, risk groups include male homosexuals, travelers and recent immigrants, and institutionalized populations
32
inflammatory thickening of intestinal wall around the abscess (can be confused with tumor)
ameboma
33
occasional ameboma
amebic granuloma
34
*Chocolate-colored ‘pus’ *necrotic material *usually bacteria free *Lesions expand *Further metastasis
Amebic Liver Abscess
35
*Metastasis via blood stream *Primarily liver *Ameba-free stools common
Extraintestinal Amebiasis
36
Amoebic pneumonitis also known as
pulmonary amoebiasis
37
*Rarely primary *Rupture of liver abscess through diaphragm *2o bacterial infections common *Fever, cough, dyspnea, pain
pulmonary amoebiasis
38
Treatment for Asymptomatic patient
Iodoquinol or Paromomycin
39
Treatment for symptomatic patient
Metronidazole or Tinidazole
40
What would be the prevention and control
Avoid fecal-oral transmission normally associated with travelers diarrhea - handwashing - ensafe water supply - thorough cooking of food
41
Same morphologic features as Entamoeba histolytica but has genetic and biochemical differences
Entamoeba dispar
42
broad blunt pseudopodia eccentric karyosome single nucleus unevenly distributed peripheral chromatin 20-25 mm
Entamoeba coli (trophozoite)
43
Necrosis of mucosa
Ulcers, dysentery
44
Ulcer enlargement
Severe dysentery, colitis, perotonitis
45
Metastasis
Extraintestinal amebiasis
46
Absence of rbc
Entamoeba hartmanni
47
Hard to locate under microscope
Entamoeba moshkovskii
48
Ingested leukocytes
Entamoeba gingivalis
49
Sluggish, non progressive
Entamoeba polecki
50
Free living sewerage
Entamoeba moshkovskii

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