Protozoology Flashcards
(113 cards)
1
Q
Nucleus: One
Peripheral chromatin: fine, uniform, beaded appearance
Karysome: small, central, “bull’s eye”
A
Trophozoites of Entamoeba histolytica/E. dispar
2
Q
Nucleus: One
Peripheral chromatin: fine, uniform, beaded appearance
Karyosome: small, eccentric
A
Trophozoites of Entamoeba hartmanni
3
Q
Nucleus: One
Peripheral chromatin: dark solid ring
Karyosome: large, eccentric
A
Trophozoites of Entamoeba coli
4
Q
Nucleus: One
Peripheral chromatin: none
Karyosome: large, irregular, blot like, central
A
Trophozoites of Endolimax nana
5
Q
Smallest intestinal protozoan
A
Trophozoites of Endolimax nana
6
Q
Nucleus: One; “basket-shaped”, “basket of flowers”
Peripheral chromatin: none
Karyosome: large, central, surrounded by reflactile achromatic granules
A
Iodamoeba butschlii trophozoites
7
Q
Cytoplasm: Fine, granular, ground glass appearance (“clean looking”)
Inclusions: RBCs (E. histolytica)
A
Entamoeba histolytica/E. dispar trophozoites
8
Q
Cytoplasm: Fine granular
A
Entamoeba hartmanni trophozoites
9
Q
Small race E. histolytica
A
Entamoeba hartmanni trophozoites
10
Q
Cytoplasm: vacoulated “dirty looking”
A
Entamoeba coli trophozoites
11
Q
Cytoplasm: Fine granular, vacuolated
Inclusions: epithelial cells, WBCs
A
Entamoeba gingivalis trophozoites
12
Q
Cytoplasm: Granular, vacuolated
A
Endolimax nana trophozoites
13
Q
Cytoplasm: Coarsely, granular, heavily vacuolated
A
Iodamoeba butschlii trophozoites
14
Q
Motility: Progressive, directional (explosive)
Hyaline fingerlike or blade pseudopod
A
Entamoeba histolytica/E. dispar trophozoites
15
Q
Motility: Non-progressive
A
Entamoeba hartmanni trophozoites
16
Q
Motility: Non-progressive (sluggish)
Blunt, granularh pseudopod
A
Entamoeba coli trophozoites
17
Q
Motility: Moderately active
Varied pseudopodia
A
Entamoeba gingivalis trophozoites
18
Q
Motility: Sluggish, non-progressive
Hyaline, blunt or fingerlike pseudopod
A
Iodamoeba buschlii trophozoites
19
Q
Nucleus: 1-4
PC: fine, uniform
K: small, central
A
Cyst of E. histolvtica/E. dispar
20
Q
Cytoplasm: CB: elongated bars
with blunt rounded
ends (cigar-
shaped, sausage-
shaped, rod-like)
A
Cyst of E. histolvtica/E. dispar
21
Q
Shape: Spherical
A
Cyst of E. histolytica/ E. dispar
22
Q
Nucleus : 1-4
A
Cyst of E. hartmanni
23
Q
CB: elongated bars with blunt
Spherical, rounded ends (bar-like, rice grain)
A
Cyst of E. hartmanni
24
Q
Shape: Spherical
A
Cyst of E. hartmanni (the same with E. histolytica and E. dispar)
25
Nucleus: 1-8
CB: with pointed
PC: coarse granular, irregular ends (splinter-like.
K: large, eccentrics
Cyst of E. coli
26
CB: with pointed broomstick, jagged ends
Cyst of E. coli
27
Shape: Spherical, oval, triangular, other shapes
Cyst of E. coli
28
***No cyst stage
E. gingivalis
29
1-4 (cross-eyed cyst, "button hole"
PC: none (comma, coccoid, short curved
K: large, blot-like, central
Cyst of E. nana
30
CB: none
granules or small oval masses
PC: none
(comma, coccoid, short curvedrods)
E. nana
31
Shape: Spherical, oval, ellipsoidal
Cyst of E. nana
32
Nucleus: 1PC: none
K: large, eccentric, with refractile achromatic granules (periendosome)
I. butschlii Cyst
33
Cytoplasm:
CB: none
Glycogen:
compact, well-defined (dark brown in lodine prep)
I. butschlii Cyst
34
Shape: Oval, ellipsoidal, triangular, other shapes
I. butschlii Cyst
35
"swine amoeba"
E. polecki
36
Cyst is UNNUCLEATED
E. polecki
37
Found in pigs and monkey
E. polecki
38
Cyst stage: "Halo" effect: retraction of cytoplasm from cyst wall
Giardia lamblia
39
- "Falling leaf," lip-flop" motility
- 4 pairs of flagella
- Sucking disk
- 2 nuclei: "old man with eyeglasses," "monkey face"
Giardia lamblia
40
Disease or Diagnosis:
- Gay bowel syndrome
- Leningrad's curse (traveler's diarrhea)
- Backpacker's diarrhea
- Beaver fever
- ST: Enterotest (String test)
Giardia lamblia
41
Cyst stage:
- Lemon-shaped
- Anterior, hyaline knob (nipple-like)
Chilomastix mesnili
42
Trophozoite stage:
- Stiff, rotary motility "shepherd's crook" appearance
- Prominent cytostome
- Spiral grooves across ventral surface
Chilomastix mesnili
43
Disease/Diagnosis
- Commensal
Chilomastix mesnili
44
NO cyst stage
Dientamoeba fragilis
45
Trophozoite stage:
- Amoeboid, "stellate" appearance
- Tetrakarvosome
- Explosive disintegration in water ("Hakansson
phenomenon")
- Formerlv classified as amoeba
Dientamoeba fragilis
46
first intermediate host of D. latum
Copepod
47
Cercaria dermatitis, commonly known as swimmer’s itch, is caused by
Schistosomes
48
“Ground itch” occurs in infxns caused by hookworms
at the site of larval penetration of the skin
49
intermediate host of Taenia asiatica
Pigs
50
Cestodes without rostellum and hooks
T. saginata
51
Mature proglottids have 7-15 finger-like branches
T. solium
52
Eggs of D. latum resemble the eggs of
P. westermani
53
Heart to lung migration occurs with
Ascaris, Strongyloides and Hookworms
54
Gravid segments contain
Eggs
55
Recovered form cestodes in stool are
Proglottids, scolex, ova
56
diagnostic stage of this parasite is the rhabditiform larva
threadworm
57
TRUE of W. bancrofti
pointed tip with no terminal nuclei
58
In hydatidosis, man serves as
Accidental intermediate host
59
Parthenogenic parasite
threadworm
60
disease is associated with contact with soil, EXCEPT
Filariasis
Can be acquired through soil contact:
- Ascariasis
- Ancylostomiasis
- Trichuriasis
- Necatoriasis
61
Incorrectly matched
- E. granulosus = ova and parasite examinations
- O. volvulus = skin snip examination
- E. histolytica = stool staining with trichrome stain
- S. haematobium = urine sediment examination
- T. spiralis = tissue biopsy
E. granulosus = ova and parasite examinations
CORRECTLY MATCHED
- O. volvulus = skin snip examination
- E. histolytica = stool staining with trichrome stain
- S. haematobium = urine sediment examination
- T. spiralis = tissue biopsy
62
migrating larvae of this parasite can be recovered in sputum
Ascaris lumbricoides
63
Helminth infection that can induce the greatest increase of eosinophils in the peripheral blood
Trichinosis
64
technique which can be used to cultivate larval stages of hookworms
Harada-Mori technique
65
Human infxn with beef tapeworm is usually less serious that with pork tapeworm because
larval invasion does not occur in beef tapeworm infection
66
Visceral larval migrans is associated with the following organism and test for identification
Toxocara spp = serology test
67
25. Humans can serve as both the intermediate and definitive host is caused by
Hymenolepis nana
68
Incorrect match between disease and its symptom
- oxyuriasis = dysyntery
- Paragonimiasis = hemolysis
- Cryptosporidiosis = watery diarrhea
- Toxoplasmosis in HIV+ patients = CNS
oxyuriasis = dysyntery
CORRECTLY MATCHED
- Paragonimiasis = hemolysis
- Cryptosporidiosis = watery diarrhea
- Toxoplasmosis in HIV+ patients = CNS
69
This condition results from the accidental ingestion of parasite eggs. In this instance, human becomes the intermediate rather than the definitive host.
Cysticercosis
70
Has oral and ventral suckers
Trematodes
71
True regarding onchocerciasis
the diagnostic method of choice is skin snip
72
Hydatid disease in human is due to the ingestion of this tapeworm stage normally infective to herbivores
embryonated egg
73
infective stage of this parasite is an egg with thin hyaline shell with one flattened side and fully developed larva within
Pinworm
74
Loeffler’s syndrome is caused by parasites
with a heart and lung intestine migration
75
Ascaris eggs seen in fresh stool
fertilized and unfertilized
76
Mode of transmission of Fasciolopsis buski
Ingestion of metacercaria
77
Ascaris lumbricoides, the most common roundworm, is carried by the mechanical vectors
Flies and cockroaches
78
Infective stage of the broad fish tapeworm to man
Plerocercoid
79
A blue stained egg around 75 microns in diameter and contains a hexacanth embryo that lacks polar knobs and filaments is that of
Hymenolepis diminuta
80
A roundworm that inhabits that small intestine and usually is demonstrated as rhabditiform larvae in feces
threadworm
81
Dracunculus infections cause ulcers that
on contact with water, release larvae
82
Adults of filarial worms live in the
lymphatic and subcutaneous tissue
83
Helminth that induces hypochromic monocytic anemia in the chronic course
Hookworm
84
Organs of the body is most often involved in extraintestinal amoebiasis
liver
85
Incorrectly paired with the appearance of its cyst
- E. coli = basket nucleus
- E. nana = cross eyed cyst
- I. butschlli = large glycogen vacuole
- E. histolytica = sausage-shaped chromatoidal bodies
E. coli = basket nucleus
Correctly paired
- E. nana = cross eyed cyst
- I. butschlli = large glycogen vacuole
- E. histolytica = sausage-shaped chromatoidal bodies
86
cyst containing 8 nuclei most probably belong to
E. coli
87
A gram stain from a gum lesion what appeared to be amoeba. A trichrome smear showed amoeba w/ a single nucleus and partially digested PMN. The best identification would be
E. gingivalis
88
Intestinal parasite seen in an iodine-mount has 25 um diameter with a homogenously stained body surrounded by a thin rim of cytoplasm containing around 4 nuclei.
Blastocystis hominis
89
protozoan cyst shows 4 nuclei with no chromatin on its nuclear membrane. Each nucleus has a large karyosome which appears as a refractive dot. Thus cyst is most likely that of
E. nana
90
Best to differentiate E. histolytica from E. hartmanni
Shape of chromatoidal bodies
91
It is trophozoite has a peripheral chromatin with beaded appearance, bull’s eye appearance, ground glass cytoplasm with RBC inclusion and unidirectional finger-like pseudopodia
E. histolytica
92
This amoebic cyst is spherical, has an average size of 6-8 um, has 4 nuclei when mature through immature cysts with 1-2 nuclei are often present. The nuclei have a small central karyosome with uniform granules of peripheral chromatin. Chromatoidal bars with blunt ends are also often present
E. histolytica
93
Has a double walled, wrinkled cyst form
Ancylostoma castellani
94
An amoeba isolated from a patient with keratitis has spiny pseudopods, well-defined ectoplasm & endoplasm, & no flagellar phase noted is most likely
Acanthamoeba
95
A patient noticed deterioration of vision after storing her contact lenses in tap water. She was diagnosed of retinitis. Culture of the tap water and of her vitreous fluid would most likely reveal
Acanthamoeba
96
The best way of obtaining specimen in corneal ulcer
Scraping
97
causes pingpong infxn. It contains siderophile granules and an undulating membrane which runs its body across the costa
T. vaginalis
98
Bilaterally symmetrical
Giardia lamblia
99
Type of blood specimen is preferred in preparing blood smears for protozoa
Capillary blood
-EDTA in UB
100
commensal flagellate with a shepherd’s crook cystosomal fibril and appears like a twisted jar
Chilomastix mesnili
101
parasite stage is the intracellular form of blood and tissue flagellates
Leishmanial
102
Infective stage of Leishmania
Promastigote
-Man: IS: Promastigote
-Sandfly: IS: Amastigote
103
Kala-azar is a form of
Visceral leishmaniasis
104
T. cruzi multiplies is a skin called chagoma. In the chronic stage, the main lesions are often observed in the
heart and digestive tract
105
The observation of piroplasms in packets of 2 or 3 or a maltese cross formation on stained blood films most likely indicates
Babesia microti
106
Infective stage of malaria parasite to humans
Sporozoite
107
pLDH meaning
Plasmodium lactate dehydrogenase
108
traveler from Africa complains of paroxysmal attacks of chills, fever and sweating that last a day or 2 and recur every 36-48 hrs. Blood smear examination reveals ringlike and crescent-like forms within RBCs. The most probable parasite is
P. falciparum
109
Applique or accole form of this parasite may be seen in blood films
P. falciparum
110
The examination of blood smear may reveal
- Babesia microti
- Trypamosoma cruzi
- Plasmodium falciparum
- Wuchereria bancrofti
111
causes of most (90%) malaria cases are
P. falciparum and P. vivax
112
Giemsa stained blood smear showed many ring forms with no older stages, and a number of the rings have double chromatin dots. These findings are characteristic of
P. falciparum
113
Partially acid fast protozoans
- Cryptosporidium hominis
- Cyclospora belli
- Cyclospora cayatenensis
