LESSON 4: PHYLUM NEMATODA

Question 1

Identify the nematode known as Bancroft’s filaria.

Answer 1

Wuchereria bancrofti

Question 2

______ is the common name of Wuchereria bancrofti.

Answer 2

Bancroft’s filaria

Question 3

What nematode causes Malayan filariasis?

Answer 3

Brugia malayi

Question 4

The diagnostic technique used for W. bancrofti is ______.

Answer 4

Giemsa stain, Knott technique

Question 5

Name the parasite known as the African Eye Worm.

Answer 5

Loa loa

Question 6

Loiasis is caused by ______.

Answer 6

Loa loa

Question 7

Identify the parasite known as the Blinding filaria.

Answer 7

Onchocerca volvulus

Question 8

River blindness is caused by ______.

Answer 8

Onchocerca volvulus

Question 9

What parasite has a sheath and nuclei that do not reach the tail tip?

Answer 9

Wuchereria bancrofti

Question 10

Mansonella ozzardi has ______ periodicity.

Answer 10

no

Question 11

Identify the nonpathogenic nematode with blunt tail and no sheath.

Answer 11

Mansonella perstans

Question 12

Malayan filaria is the common name of ______.

Answer 12

Brugia malayi

Question 13

What parasite causes upper limb elephantiasis?

Answer 13

Brugia malayi

Question 14

Unna’s paste boots are used for ______.

Answer 14

relieving limb enlargement

Question 15

Which nematode’s vector is Chrysops fly?

Answer 15

Loa loa

Question 16

The size range of Wuchereria bancrofti is ______.

Answer 16

240–300 µm

Question 17

What is the intermediate host of Brugia malayi?

Answer 17

Mansonia, Aedes, Anopheles spp.

Question 18

The intermediate host of Onchocerca volvulus is ______.

Answer 18

Simulium black fly

Question 19

Which nematode has nocturnal periodicity?

Answer 19

Wuchereria bancrofti

Question 20

The primary symptom of elephantiasis is ______.

Answer 20

limb enlargement

Question 21

Which parasite causes eosinophilia and inguinal swelling but can also be asymptomatic?

Answer 21

Wuchereria bancrofti

Question 22

The nuclei of Loa loa ______ to the tip of the tail.

Answer 22

are continuous

Question 23

Which nematode has two distinct terminal nuclei?

Answer 23

Brugia malayi

Question 24

The term for infection by filarial nematodes is ______.

Answer 24

Filariasis

Question 25

Which parasite causes noticeable migration under the conjunctiva?

Answer 25

Loa loa

Question 26

A non-tender localized swelling in Loa loa infection is called ______.

Answer 26

Calabar swelling

Question 27

Which parasite causes river blindness?

Answer 27

Onchocerca volvulus

Question 28

The host vector for Mansonella perstans is the ______.

Answer 28

Culicoides (sucking midge)

Question 29

Which nematode has no sheath and has nuclei that do not reach the tip of the tail?

Answer 29

Onchocerca volvulus

Question 30

Hydrocele in W. bancrofti infection refers to ______.

Answer 30

enlarged male scrotum

Question 31

What parasite shows a hyper-responsive immune reaction known as Expatriate syndrome?

Answer 31

Filarial parasites

Question 32

Upper limb elephantiasis is typically caused by ______.

Answer 32

Brugia malayi

Question 33

Which filarial nematode is found in both serous cavity and subcutaneous tissue?

Answer 33

Mansonella spp.

Question 34

The nocturnal periodicity of Brugia malayi occurs between ______.

Answer 34

9pm to 4am

Question 35

Which nematode is diagnosed through skin snips?

Answer 35

Onchocerca volvulus

Question 36

M. ozzardi and M. perstans are both ______.

Answer 36

nonpathogenic

Question 37

Which filarial worm’s larvae are called microfilariae?

Answer 37

Adult filariae

Question 38

The diagnostic form of filarial worms is the ______.

Answer 38

Filariform (L3)

Question 39

Which parasite causes lymphadenitis and skin itching?

Answer 39

Mansonella ozzardi

Question 40

The diagnostic stain used for most filarial nematodes is ______.

Answer 40

Giemsa stain

Question 41

Which nematode is associated with tropical pulmonary eosinophilia?

Answer 41

Filarial nematodes (Wuchereria bancrofti, Brugia malayi)

Question 42

A condition where lymph fluid leaks into the kidneys is called ______.

Answer 42

Chyluria

Question 43

Which parasite has continuous nuclei that extend to the tail tip and no sheath?

Answer 43

Mansonella perstans

Question 44

The vector of Onchocerca volvulus is the ______.

Answer 44

Simulium black fly

Question 45

Which parasite causes urticaria, arthralgia, and is often asymptomatic?

Answer 45

Mansonella ozzardi

Question 46

The characteristic of nuclei not extending to the tip is seen in ______.

Answer 46

Wuchereria bancrofti and Onchocerca volvulus

Question 47

Which parasite has no sheath and is found in skin tissue with no defined periodicity?

Answer 47

Onchocerca volvulus

Question 48

Calabar swellings and liver enlargement are symptoms of ______ infection.

Answer 48

Mansonella perstans

Question 49

Which nematode is associated with adenolymphangitis and genital lesions?

Answer 49

Wuchereria bancrofti or Brugia malayi

Question 50

The tail of Mansonella perstans is ______.

Answer 50

blunt with nuclei filling to the tip

Question 51

Which species are best diagnosed using tissue biopsies?

Answer 51

Onchocerca volvulus and Loa loa

Question 52

Filarial worms exhibit a characteristic timing of detection called ______.

Answer 52

periodicity

Question 53

Which microfilariae are best collected during midday?

Answer 53

Loa loa

Question 54

The blinding filaria's tail is ______ and its nuclei ______ the tip.

Answer 54

pointed, do not reach

Question 55

Which worm may be surgically removed due to visible migration in skin?

Answer 55

Loa loa

Question 56

The diagnostic stage of filarial nematodes often detected in blood is the ______.

Answer 56

microfilariae

Question 57

Which parasite causes ocular manifestations and severe allergic reactions?

Answer 57

Onchocerca volvulus

Question 58

The term used for a highly immune-reactive response to filarial parasites is ______.

Answer 58

Expatriate syndrome

Question 59

Which parasite is found in tropical regions like Asia and the Caribbean?

Answer 59

Wuchereria bancrofti or Brugia malayi

Question 60

The intermediate host of Loa loa is the ______.

Answer 60

Chrysops fly