Parasitology - Lab Exam 2

Question 1

Answer 1

NOTE: Eggs of T. saginata and T. solium

• Shell is thick and radially striated surrounding a hexacanth embryo
• Within the shell, the oncosphere has 3 pairs of hooklets

Question 2

ID microfilariae

Answer 2

Question 3

Answer 3

Hymenolepis diminuta (Rat Tapeworm)

Question 4

Answer 4

Diphyllobothrium latum ova

Question 5

Answer 5

Question 6

Answer 6

Question 7

Answer 7

Trichinella spiralis

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Eye Worm (Loa Loa)

• Localized subcutaneous edema (Calabar
  swellings) ,particularly around the eye
• Caused by microfilariae migration and death in

capillaries

• Dying adults induce a granulomatous reaction
• Proteinuria and endomyocardial fibrosis can also

occur

Question 12

Answer 12

Wuchereria bancrofti and Brugia Malayi

Question 13

Answer 13

Question 14

Differentiation of Microfilariae in Stained Blood Smear

Answer 14

• Examine for the presence or absence of sheath (a thin, translucent eggshell remnant covering of the body of the microfilaria and extending past the head and tail.
• Examine the tail area of microfilaria for the presence or absence of cells that exhibit characteristic array of stained nucleus.

Question 15

Answer 15

Question 16

Answer 16

Brugia Malayi

Question 17

Answer 17

Hymenolepis diminuta (Rat Tapeworm)

Question 18

Identify

Answer 18

Echinococcus granulosus (Hydatid Tapeworm)

Question 19

Answer 19

Question 20

Answer 20

Diphyllobothrium latum

Question 21

Answer 21

Taenia saginata (Beef Tapeworm)

Question 22

Answer 22

Question 23

Answer 23

b. tomori

Question 24

Answer 24

Question 25

Answer 25

Hymenolepis nana (Dwarf Tapeworm)

Question 26

Answer 26

Taenia solium (Pork Tapeworm)

Question 27

Answer 27

Question 28

Answer 28

Question 29

Answer 29

Angiostrongylus cantonensis

Common Name : Rat lung worm
• Most common cause of human eosinophilic meningitis.
• Final Host : Rat
• Intermediate Host : Snails & slugs

Question 30

Answer 30

Question 31

Answer 31

Taenia saginata (Beef Tapeworm)

Question 32

Answer 32

Hymenolepis diminuta (Rat Tapeworm)

Question 33

Answer 33

Taenia solium (Pork Tapeworm)

Question 34

Answer 34

Question 35

Answer 35

Taenia saginata (Beef Tapeworm)

Question 36

Answer 36

Question 37

Answer 37

Question 38

Answer 38

Diphylidium caninum

Question 39

Name large body compartments - 3

Answer 39

Question 40

Answer 40

Hymenolepis diminuta (Rat Tapeworm)

Question 41

Answer 41

Question 42

Answer 42

Question 43

Answer 43

Wuchereria bancrofti

Question 44

Answer 44

Question 46

Answer 46

Toxocara canis

Common Name : Dog roundworm

Disease Name : Toxocariasis

Question 47

Answer 47

Question 48

Answer 48

Diphylidium caninum

Question 49

Answer 49

Hymenolepis nana (Dwarf Tapeworm)

Question 50

Answer 50

Brugia Malayi

Question 51

Answer 51

Question 52

Answer 52

Angiostrongylus cantonensis

Common Name : Rat lung worm
• Most common cause of human eosinophilic meningitis.
• Final Host : Rat
• Intermediate Host : Snails & slugs

Question 53

Answer 53

Hymenolepis nana (Dwarf Tapeworm)

Question 54

Answer 54

Elephantiasis (Bancroft’s Filaria)

• In the early acute phase, fever and lymphangitis
• After years of repeated exposure, chronic

elephantiasis develops due to obstruction of lymphatics, lymph stasis and lymphadematous changes.

• After death of the adult worm, a surrounding granulomatous thickening the lymphatic walls are formed causing obstruction and resultant enlargement below the blocked area.

Question 55

Answer 55

Question 56

Answer 56

Taenia solium (Pork Tapeworm)

Question 57

Answer 57

Trichinella spiralis

Habitat: Striated muscle tissue

Larva encysted in the muscle cell (called the nurse cell)

Granuloma forms around the nurse cell and becomes calcified

over time

Question 58

Answer 58

Diphyllobothrium latum

Question 59

Answer 59

Taenia solium (Pork Tapeworm)