Protozoans

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Entamoeba histolytica

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221 Terms

1

Entamoeba histolytica

In subphylum sarcodina parasites, all are commensal except for?

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2

Entamoeba gingivalis

In subphylum sarcodina parasites, all are intestinal dwellers except for?

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3

Entamoeba gingivalis and Dientamoeba fragilis

In subphylum sarcodina parasites, all undergo encystation except for?

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4

Binary fission

Amoebas multiply through?

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5

Loesch

E. histolytica was first described by?

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6

Cysts

Infective stage of E. histolytica

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7

Ingestion of food/water with Entamoeba histolytica cyst

Mode of transmission of E. histolytica

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8

Cockroach (Periplaneta americana), Flies (Musca domestica)

Phoretic vectors of E. histolytica

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9

Amoebiasis

What is the pathology of E. histolytica

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10

Metronidazole

Treatment for E. histolytica

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11

MOTILE

MOTILE or NON-MOTILE. Trophozoite of E. histolytica

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12

NON-MOTILE

MOTILE or NON-MOTILE. Cyst of E. histolytica

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13

Trophozoite

In what form is the feeding stage of E. histolytica

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14

Cyst

In what form is the non-feeding stage of E. histolytica

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15

Trophozoite

It is the vegetative state of E. histolytica?

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16

Cyst

It is the infective state of E. histolytica?

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17

Watery, soft, or semi-formed stool

Trophozoite of E. histolytica is found in what type of stool?

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18

Soft to formed stool

Cyst of E. histolytica is found in what type of stool?

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19

Fragile

Trophozoites of E. histolytica is _______ as they are destroyed by gastric juices hence they are the non-infective stage

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20

Resistant to acidic pH

Cyst of E. histolytica is ________ due to its cystic wall which contains chitin and lectins

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21

FALSE

TRUE or FALSE. Trophozoites of E. histolytica cannot encyst if excreted from the body as encystation only occurs in the small intestine

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22

Entamoeba coli

They are harmless inhabitant of the colon

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23

Entamoeba dispar

This parasite is morphologically similar to E. histolytica and it can only be distinguish by their DNA or rRNA

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24

Entamoeba harmanni

They are also similar with E. histolytica but smaller and has no RBC inclusion

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25

Small race

E. hartmanni asre known as the _____ of E. histolytica

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26

Entamoeba hartmanni

The cysts of these parasites are quadrinucleated with coarse cytoplasm; their immature cyst has chromatoidal bars

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27

Entamoeba polecki

These are the parasite of pigs and monkeys; they rarely infect humans

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28

Cyst

E. polecki is distinguished from E. histolytica by?

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29

Uninucleated

The cysts of E. polecki are consistently?

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30

Entamoeba gingivalis

This can be found in the mouth (gum and teeth surface)

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31

Entamoeba gingivalis

Which ameoba does not have a cyst stage?

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32

E. histolytica, E. dispar, E. moshkovskii, E. bangladeshi

Which 4 amoebas are morphologically similar?

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33

0-41 degrees celsius

E. moshkovskii are able to survive at a temperature ranging from?

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34

Endolimax nana

It is the smallest protozoa

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35

Endolimax nana

Which parasite has a cyst that is quadrinucleated with eccentric karyosome?

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36

Sluggish and mononuclear

What characteristic does a Endolimax nana trophozoite possess?

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37

Iodamoeba butschlii

This parasite has an iodine cyst and has a large glycogen vacuole/body which stains deeply with iodine.

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38

Unidirectional, active progressive

Movement of E. histolytica trophozoite stage

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39

Sluggish, non progressive

Movement of E. coli trophozoite stage

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40

Entamoeba histolytica trophozoite

What parasite and stage has a pseudopodia shape of finger-like?

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41

Entamoeba coli trophozoite

What parasite and stage has a pseudopodia shape of blunt?

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42

RBCs

What does E. histolytica have that makes it different from E. coli trophozoite?

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43

Bacteria, yeast, cell debris

What does E. coli have that makes it different from E. histolytica trophozoite?

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44

CLEAN-LOOKING

CLEAN-LOOKING or DIRTY-LOOKING. Endoplasm of Entamoeba histolytica

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45

DIRTY-LOOKING

CLEAN-LOOKING or DIRTY-LOOKING. Endoplasm of Entamoeba coli

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46

Entamoeba histolytica trophozoite

Which parasite has a uninucleated nucleus with central karyosome

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47

Entamoeba coli trophozoite

Which parasite has a uninucleated nucleus with eccentric karyosome

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48

less than or equal to 4

Number of nuclei of E. histolytica cyst

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49

greater than 4 (mature: 8)

Number of nuclei of E. coli cyst

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50

Cigar/rod/coffin-lid shaped

What are the chromatoidal bar shape of E. histolytica cyst

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51

Witch-broom/splintered/needle like

What are the chromatoidal bar shape of E. coli cyst

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52

Thick

THICK or THIN. Nuclear membrane of E. coli

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53

THIN

THICK or THIN. Nuclear membrane of E. histolytica

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54

Intestinal amoebiasis

Most common pathology of Amoebiasis

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55

Amoebic dysentery

This pathology is caused by E. histolytica and is differentiated by another pathogen by the presence of Charcot-Leyden Crystals

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56

Amoebic colitis

This is the ulceration of the intestine and is caused by E. histolytica

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57

Flask-shaped

What shape is the ulcer when there is an amoebic colitis?

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58

Extraintestinal amoebiasis

This type of pathogen occurs due to its motility

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59

Hepatic amoebiasis

This is the most common extraintestinal amoebiasis

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60

Anchovy sauce-like appearance

Amoebic liver abscess has a what type of appearance?

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61

Hepatic amoebiasis, Pulmonary amoebiasis, Cerebral amoebiasis, Amebic pericarditis, Cutaneous amoebiasis, Genital amoebiasis

What are the 6 Extraintestinal Amoebiasis?

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62

Cytoadherence

This is use for the attachment to large intestine

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63

Galactose/N-acetyl galactosamine

What type of lectin has a characteristic to attach to the large intestine? (Full name)

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64

Caspase-3

Which factor causes apoptotic death of mucosal cells

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65

Myosin IB

Which factor ingests RBC?

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66

Entamoeba histolytica

Myosin IB results in presence of RBCs in what amoeba?

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67

Amebapores

These factors are pore-formers and causes ulceration of tissues/cells of the host

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68

Cysteine proteinase

This is the most virulent factor

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69

Cysteine proteinase

Which factor causes tissue invasiveness that leads to extraintestinal amoebiasis

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70

Trophozoite motility

What is observed in the Saline solution direct fecal smear?

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71

Saline + Methylene Blue

Which type of DFS is used for Entamoeba species wherein they are stained blue?

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72

Saline + Lugol’s iodine

This is where only nucleus of E. histolytica cyst can be observed

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73

Stramenophile

Blastocystis hominis does not have an exact taxonomic classification which means they are?

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74

Blastocystis hominis

This amoeba is commensal but it may cause diarrhea to some immunocompromised patient

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75

Dientamoeba fragilis

This amoeba can be transported by pinworm to man

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76

Rosette-shaped

The shape of Dientamoeba fragilis nuclei

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77

Commensal, Ameboflagellate, has no cyst stage

Characteristics of Dientamoeba fragilis

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78

Irritable Bowel Syndrome

Chronic infection of Dientamoeba fragilis may mimic what?

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79

Primary Amoebic Meningoencephalitis (PAM)

N. fowleri is the causative agent of?

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80

Naegleria fowleri

This parasite is thermophilic wherein they can survive up to 30 degrees celsius

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81

Promitosis

N. fowleri multiplies through?

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82

TRUE

TRUE OR FALSE. The nuclear membrane of N. fowleri does not break down

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83

Cerebrospinal fluid

Specimens used in diagnosing N. fowleri

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84

Spinal tap

Cerebrospinal fluid for diagnosing N. fowleri is collected through?

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85

Escherichia coli

When diagnosing N. fowleri in culture, non nutrient medium with Page’s saline seeded with living what?

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86

1 mg/L chlorine solution, pH 8-8.01, Place in 38 degrees celsius

Ways to eliminate N. fowleri

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87

Uninucleated with rounded chromatoidal bars

Cyst of N. fowleri

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88

Amoeboid

Which for of the trophozoite of N. fowleri can be recognized in humans?

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89

Flagellated

Which form of N. fowleri trophozoite does not divide

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90

Acanthamoeba castellani

What is the most common Acanthamoeba species?

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91

Granulomatous Amebic Encephalitis

This is a destructive encephalopathy and associated with meningeal irritation

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92

Amebic keratitis

This is associated with improperly disinfected contact lenses when cleaned with tap water or impure lens solution

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93

Discharges, exudates, tissue secretions

Specimen used for Acanthamoeba species

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94

Bacterial growth

The antibiotics added when culturing Acanthamoeba species removed unwanted?

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95

Balamuthia mandrillaris

The pathology of this amoeba is similar with Granulomatous Amebic Encephalitis

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96

Finger-like pseudopodia

Characteristic of Balamuthia mandrillaris trophozoite

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97

Spherical

Shape of Balamuthia mandrillaris cyst

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98

Sappinia diploidea

This is a newly recognized human pathogen causing amoebic encephalitis

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99

Ciliates

Phylum ciliophora is also known as?

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100

Balantidium coli

The only member of Phylum ciliophora

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