Exam 1 Practical

Question 1

Which filarial Nematode is this?

Answer 1

Wuchereria bancrofti microfilariae

(Sheathed, no nuclei at the tip)

Question 2

Which Nematode is this?

8-13mm

Answer 2

Enterobius vermicularis adult

Question 3

Which Trematode is this?

150µm

Answer 3

Schistosoma mansoni egg

Question 4

Which Trematode is this?

30µm

Answer 4

Clonorchis sinensis/Opisthorchis spp egg

Question 5

Which insect is this?

Answer 5

Phthiris pubis (pubic louse)

Question 6

Which insect is this?

Answer 6

Flea

Question 7

Which Cestode is this?

Answer 7

Echinococcus granulosus (mature adult from hydatid sand)

Question 8

Which Nematode is this?

55µm

Answer 8

Enterobius vermcularis egg

Question 9

Which Nematode is this?

Answer 9

Strongyloides stercoralis

Rhabditiform larvae

Question 10

Which Cestode is this?

70-85µm

Answer 10

Hymenolepis diminuta

Question 11

Which Nematode is this?

45-75µm

Answer 11

Unfertilized Ascaris lumbricoides egg

Question 12

Which Cestode is this?

Answer 12

Dipylidium caninum

Question 13

Which Cestode is this?

~40µm

Answer 13

Taenia spp (unable to differentiate b/w T. saginata and T. solium)

Question 14

Which filarial Nematode is this?

Answer 14

Brugia malayi microfilariae

(Sheathed, space b/w last two nuclei at tip of tail and cephalic space)

Question 15

Which Trematode is this?

150µm

Answer 15

Schistosoma hematobium egg

Question 16

Which Trematode is this?

90µm

Answer 16

Paragonimus westermani egg

Question 17

Which insect is this?

Answer 17

Pediculus humanus (body louse)

Question 18

Which Cestode is this?

65µm

Answer 18

Diphyllobothrium latum

Question 19

Which Cestode is this?

30-45µm

Answer 19

Hymenolepis nana

Question 20

Which Cestode is this?

Answer 20

Echinococcus granulosus (hydatid sand)

Question 21

Which filarial Nematode is this?

Answer 21

Onchocerca vulvulus microfilariae

(No sheath, no nuclei at tip of tail)

Question 22

Which Nematode is this?

45-75µm

Answer 22

Fertilized Ascaris lumbricoides egg (w/ mammilated coat)

Question 23

Which Trematode is this?

130µm

Answer 23

Fasciolopsis buski/Fasciola hepatica (indistinguishable)

Question 24

Which filarial Nematode is this?

Answer 24

Loa loa microfilariae

(Sheathed, nuclei are continuous to tip of tail)

Question 25

Which Nematode is this? What type of prep is this?

Answer 25

Trichinella spp; cross section of muscle biopsy

Question 26

Which Nematode is this? 250-300µm

Answer 26

Hookworm Rhabditiform larvae

Question 27

Which Nematode is this? ~50µm

Answer 27

Trichuris trichiura egg

Question 28

Which Nematode is this? 50-60µm

Answer 28

Hookworm egg

Question 29

Which Nematode is this? What type of prep was used?

Answer 29

Trichinella spp; squash prep

Question 30

What type of arachnid is this?

Answer 30

Tick

Question 31

Which Cestode do these proglottids belong to?

Answer 31

Diphyllobothrium latum

Question 32

Which Nematode is this? 30-50mm

Answer 32

Trichuris trichiura adult

Question 33

What type of arachnid is this?

Answer 33

Mite

Question 34

Which Cestode is this? 65µm

Answer 34

Diphyllobothrium latum

Question 35

Which Trematode is this? 85µm

Answer 35

Schistosoma japonicum egg

Question 36

Which insect is this?

Answer 36

Pediculus capitus (head louse nit)

Question 37

Which Nematode is this? 45-75µm

Answer 37

Ascaris lumbricoides egg (the egg on the top has been decorticated)