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MedLabs - Micro 2 > Weekly Quiz Questions > Flashcards

Weekly Quiz Questions Flashcards

1
Q

Dimorphic fungi demonstrate yeast and mold at what temperatures?

A

Yeast - 37 degrees

Mold - 25 degrees

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2
Q

The most common means of acquiring a fungal infection

A

inhalation of spores

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3
Q

Aseptate

A

without cross walls

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4
Q

Hyphae

A

tubular structures comprising mold, form of fungal growth

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5
Q

Mycelium

A

network of hyphae

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6
Q

Spore

A

Reproductive structure

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7
Q

Superficial infection

A

Outermost dead layer of the skin or hair

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8
Q

Subcutaneous infection

A

*** deeper skin layers, including muscle, bone, connective tissue

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9
Q

Systemic infection

A

internal organs or deep tissues of the body

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10
Q

Cutaneous infection

A
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11
Q

Polyenes

A

binds to ergosterol, create ion channels that disrupts the cell membrane

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12
Q

Azoles

A

Inhibits/disrupts cell membrane synthesis

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13
Q

Echinocandins

A

inhibits/disrupts cell wall synthesis

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14
Q

Flucytosine

A

interferes with synthesis of DNA, RNA and proteins

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15
Q

Dimorphic fungus

A
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16
Q

Primary vs Opportunistic pathogen

A
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17
Q

Blastomyces dermatitis

A

large, spherical, thick walled yeast cells 8-15um in diameter, usually with a single bud that is connected to the parent by a broad base

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18
Q

Immunocompromise patients, particularly those who have uncontrolled diabetes mellitus and those who are receiving prolonged corticosteroid, antibiotic, or cytotoxic therapy, are at the greatest risk of developing infection with ?

A

Mucurmycetes

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19
Q

Prevention measures for candidemia

A
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20
Q

Host conditions that are associated with an infection incidence of Candida albicans infections include

A

Diabetes
prolonged antibiotic use
pregnancy

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21
Q

ways to distinguish fungal contaminants from fungal pathogens

A

Virulence

Disease process

22
Q

Fluorescence is key for identification of

A

microsporum

23
Q

a dimorphic fungus

A

sporothrix schenckii

24
Q

in the US, the most common organism cause it eumycotic mycetoma

A

Pseudallescheria boydii

25
Q

Structures invaded by Trichophyton genus

A

Hair, skin, nails

26
Q

Tinea versicolor is a skin infection caused by

A

Malassezia furfur

27
Q 
Hookworm : route of entry 
infective stage 
intermediate host 
clinical syndromes 
diagnosis 
prevention
A 
ROI : skin penetration/cutanteous 
IS : ? 
IH : N/A
CS: (3) Minor - fatigue, headaches, Major - fatigue, iron deficiency, loss of appetite, Extreme - anemia, death
D : 
P : sanitation, adequate footwear
28
Q

Are Nematodes hermaphroditic?

A

No

29
Q

What is the relationship of obligate parasites and their host?

A

Obligate parasites can only survive in a host

30
Q

the definitive host harbors

A

the adult stage of a parasite

31
Q

Types of protozoans

A

amoebae and flagellate

32
Q

Proglottids

A

segments of the body found in cestodes

33
Q

Amebic cyst

A

the non-feeding, nonmotile stage that is infectious to humans

34
Q

ways to prevent parasitic infections

A

anti parasitic drugs, diet change , supplement vitamins, replace fluids, blood transfusion, bed rest

35
Q

Types of nematodes

A

hookworms, trichuris

36
Q

Parasites acquired by cutaneous penetration

A

hookworm, strongyloides

37
Q

Pneumonia-like syndrome may be found in humans exposed to (parasites)

A

Ascaris, hookworm, strongyloides

38
Q

Fish is an intermediate host for

A

Dibothriocephalus

39
Q

In the life cycle of hermaphroditic flukes, the infective stage for the snail is

A

Miracidium

40
Q

2 protozoan organisms most commonly associated with waterborne outbreaks of diarrhea is the US

A

Cryptosporidium spp, Giardia lamblia

41
Q

Protozoan causing diarrhea that has been associated with raspberries, herbs and some vegetables

A

cyclosporine cayetanesis

42
Q

Small threadlike worm is observed under the conjunctiva of the eye
(parasite and life stage)

A

Loa loa, adult

43
Q

What type of periodicity is exhibited if microfilariae appear in the blood of an individual at 2pm each day

A

dinural

44
Q

the infective stage of Schistosoma mansoni

A

cercaria swimming in water

45
Q

Vector for Leishmania

A

sandfly

46
Q

Diagnostic stage of T.b rhodesiense

A

Tryptomastigote

47
Q

The ameboid trophozoites of Naeglaeria fowleri enter the human body via

A

nasal mucosa
inhalation of contaminated dust
sniffing contaminated water

48
Q

Causitive agent of African sleeping sickness

A

Trypansoma brucei gambiense, T.b. rhodesiense

49
Q

why do we not see domestic cases of Chaga’s disease if the vector is located here?

A

**

50
Q

Best temperature for storage of viral specimens on a short-term basis

A

4 or 37 degrees

51
Q

viral structure consisting of nucleic acid surrounded by a protein coat is called

A

Envelope or Nucleocapsid

MedLabs - Micro 2 (9 decks)

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