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2ND YR 1S > PRL NMT Filarial Worms (TAA) > Flashcards

PRL NMT Filarial Worms (TAA) Flashcards

1
Q

Filarial worms is part of the superfamily _____

A

Filarioidea

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2
Q

Habitat of filarial worms

A

Subcutaneous tissues
Lymphatic system
Deep connective tissue

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3
Q

2 medically important filarial species in the Philippines

A

Wuchereria bancrofti
Brugia malayi

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4
Q

Common name of Wuchereria bancrofti

A

Bancroft’s Filarial Worm

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5
Q

Common name of Brugia malayi

A

Malayan Filarial Worm

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6
Q

Intermediate host of Wuchereria bancrofti

A

Anopheles, Aedes, Culex

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7
Q

Intermediate host of Brugia malayi

A

Mansonia bonneae, Mansonia uniformis

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8
Q

T/F: Anopheles mosquito may also transmit B. malayi

A

T

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9
Q

Habitat of the adult W. bancrofti

A

Lower lymphatic

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10
Q

Habitat of the adult B. malayi

A

Upper lymphatic

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11
Q

Diagnostic stage of W. bancrofti and B. malayi

A

Microfilaria

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12
Q

Samples used for the diagnosis of W. bancrofti and B. malayi

A

Blood, Lymphatic fluid

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13
Q

Infective stage of W. bancrofti and B. malayi

A

L3 filiform

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14
Q

Mode of transmission of W. bancrofti and B. malayi

A

Skin penetration

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15
Q

Periodicity of W. bancrofti

A

Nocturnal

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16
Q

Periodicity of B. malayi

A

Periodic-nocturnal, subperiodic

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17
Q

Compare the cephalic spaces of W. bancrofti and B. malayi

A

W. bancrofti: 1:1
B. malayi: 2:1

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18
Q

Sheath affinity of W. bancrofti to Giemsa stain

A

Unstained

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19
Q

Sheath affinity of B. malayi to Giemsa stain

A

Stained-pink

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20
Q

Appearance of body nuclei of W. bancrofti

A

Regularly spaced

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21
Q

Appearance of body nuclei of B. malayi

A

Overlapping/irregular

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22
Q

Has 2 terminal nuclei

A

B. malayi

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22
Q

Compare the curved appearance of W. bancrofti and B. malayi

A

W. bancrofti: graceful curve
B. malayi: kinky/stiff

23
Q

T/F: stains that can be used for filarial worms include Giemsa, Wright, and Hematoxylin stain

A

F. Wright stain is discouraged for filarial womrs

24
Q

Period of sexual maturity of filarial worms

A

6-12 months

25
Q

Up to how many microfilariae per day can be produced by female worm?

A

50 000

26
Q

In which stain is the sheath more observable?

A

Hematoxylin stain

27
Q

Drug of choice for filarial worms

A

Diethylcarbamazine

28
Q

When is blood collection for the diagnosis of filariasis done?

A

at night

29
Q

Reagent for Knott’s concentration technique

A

2% formalin

30
Q

Pathology of adult filarial worms

A

Lymphatic filariasis
Elephantiasis
Hydrocele

31
Q

Vector of Loa loa

A

Fly (Chrysops sp.)

32
Q

Periodicity of Loa loa

A

Diurnal

33
Q

Habitat of the adult Loa loa

A

Subcutaneous tissue, blood

34
Q

Has nuclei that extends to the tip of the tail

A

Loa loa

35
Q

Vector of Onchocerca volvulus

A

Fly (Simulium sp.)

36
Q

Periodicity of O. volvulus

A

Nonperiodic

37
Q

Habitat of adult O. volvulus

A

Subcutaneous nodule, subcutaneous tissue

38
Q

Unsheathed filaria species

A

Onchocerca volvulus
Mansonella ozzardi
Mansonella perstans
Mansonella streptocerca

39
Q

Has nuclei that extend to blunt tip of tail

A

Mansonella perstans

40
Q

Vector of M. perstans

A

Midge (Culicoides sp.)

41
Q

Periodicity of M. perstans

A

Nonperiodic

42
Q

Habitat of adult M. ozzardi

A

Body cavity, blood, skin

43
Q

Vector of M. ozzardi

A

Midge (Culicoides sp.)

44
Q

Periodicity of M. ozzardi

A

Nonperiodic

45
Q

Habitat of adult M. perstans

A

Mesentery, blood

46
Q

Has nuclei that extend to the tip of hooked tail

A

Mansonella streptocerca

47
Q

Vector of M. streptocerca

A

Midge (Culicoides sp.)

48
Q

Periodicity of M. streptocerca

A

Nonperiodic

49
Q

Habitat of adult M. streptocerca

A

Subcutaneous, skin

50
Q

Causes river blindness

A

Loa loa

51
Q

Common name for Loa loa

A

African eye worm

52
Q

Side effects of Diethylcarbamazine

A

Fever, chills, headache, dizziness, nausea and vomiting, itching, and joint pain

53
Q

Has the same morphologic characteristics as W. bancrofti but has no sheath

A

O. volvulus

54
Q

Filarial worms in dogs

A

Dirofiliaria immitis
Dirofiliaria repens

55
Q

Diagnostic for Fillarial Worms

A
  1. Thick smears
  2. Diethylcarbamazine Provocative Test
  3. Knott’s Technique
  4. RDT - antigen/antibody

2ND YR 1S (16 decks)

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