CN2 Cestodes

Question 1

In T. saginata, can man serve as an intermediate host?

Answer 1

No, defibitive host only

Question 2

T. saginata adult worms inhabit in the jejunum and may live for how many yrs?

Answer 2

25 yrs

Question 3

How long is taenia saginata?

Answer 3

4-10 m in length, we have 1,000 up to 4,000 proglottids

Question 4

How long is the cuboidal scolex of taenia saginata?

Answer 4

1-2mm in diameter, and have 4 prominent acetabula

Question 5

It is devoid of hooks or a rostellum and is attached to a short neck from which a chain of immature and gravid proglottid develop

Answer 5

Scolex of taenia saginata

Question 6

Gravid proglottid are longer than wide in taenia saginata and the uterus is distended with ova and has

Answer 6

15 to 20 lateral branches

Question 7

Spherical
30 to 45 micrometers
Brownish
Thick embryophore

Answer 7

Taenia saginata eggs

Question 8

What is inside the egg shell of taenia saginata?

Answer 8

Oncosphere or embryo provided with three pairs of hooklets

Question 9

In taenia solium, can serve as an intermediate host?

Answer 9

Yes, both definitive and intermediate host

Question 10

Where does the taenia solium adult worm inhabit?

Answer 10

Upper part of the small intestine

Question 11

How long is taenia solium?

Answer 11

2 to 4 m in length and may have 800 to 1,000 proglottids

Question 12

Have 4 acetabula wc is smaller (1mm) and more spherical

Carries a cushion like rostellum with a double crown of 25-30 large and small hooks

Answer 12

Scolex of taenia solium

Question 13

It has accessory ovarian lobe
No vaginal sphincter
Smaller number of follicular cells (100 to 200)
Gravid proglottid contains 7-15 lateral braches

Answer 13

Taenia solium

Question 14

30-45 um

Thick brown striated embryophore surrounding a hexacanth embryo

Answer 14

T. solium

Question 15

Which infection is more common in the Philippines?

Answer 15

Taenia saginata

Question 16

In the life cycle of taenia saginata, upon ingestion of the eggs by the cattle, what is released?

Answer 16

Oncosphere

Question 17

T. saginata: Where does the oncosphere actively penetrate and then enters a venule from which it is carried to different parts of the body?

Answer 17

Intestinal mucosa

Question 18

T. saginata: once it enters a muscle fiber and it develops into an infective stage in 2 mos called

Answer 18

Cysticercus bovis

Question 19

T. saginata: It is a ovoidal, milky white, about 10 mm in diameter and a single scolex invaginated into a fluid filled bladder

Answer 19

Cysticercus

Question 20

The larva is digested out of the meat and the scolex evaginated to attach to the mucosa of the SI where it will become mature in how many weeks?

(T. saginata)

Answer 20

12 weeks

Question 21

In T. solium the oncosphere penetrates the intestinal mucosa to encysts in muscles as

Answer 21

Cysticercus cellulosae

Question 22

Oval, translucent with opaque invaginated scolex with four suckers and a circlet of hooks

Answer 22

Mature cysticercus

Question 23

In taenia saginata, passage of proglottid causes:

Answer 23

Mild irritation at the site of attachment

Question 24

Nonspecific symptoms such as epigastric pain, vague discomfort, hunger pangs, weakness, weight loss, loss of appetite and pruritus ani

Answer 24

T. saginata symptoms

Question 25

Rarely tangled problems may result in

Answer 25

Intestinal obstruction

Question 26

What is the most serious manifestation of taenia solium which is considered one of the most serious zoonotic disease worldwide?

Answer 26

Neurocysticercosis

Question 27

What are observed when cysts are in the cortex?

Answer 27

Seizures

Question 28

The subarachnoid form may lead to aggressive form called

Answer 28

Racemous cysticercosis

Question 29

In the eyes, cysticerci may float freely where?

Answer 29

Vitreous humor

Question 30

Vision is usually affected due to

Answer 30

Chorioretinitis and vasculitis

Question 31

What can D. latum result in?

Answer 31

Hyperchromic, megaloblastic anemia with thrombocytopenia and leukopenia

Question 32

What is the drug of choice for T. saginata infxns?

Answer 32

Praziquantel 5-10mg/kg as single dose

Question 33

What is the criteria for cure in T. saginata?

Answer 33

1) recovery of scolex | 2) negative stool exam 3 mos after tx

Question 34

What is the drug of choice for T. solium infxns in INTESTINAL?

Answer 34

Praziquantel 5-10mg/kg | Niclosamide (not locally available)

Question 35

What is the drug of choice for T. solium infxns in CYSTICERCOSIS - multiple parenchymal cystic lesions?

Answer 35

* Praziquantel at a dose of 50-75 mg/kg divided in 3 doses for 30 days * Albendazole at a dose of 400mg twice daily for 8-30 days Steroids are then given 4 hrs after last dose - 80mg Prednisone - 10mg IM Dexamethasone

Question 36

Parenchymal forms presenting as cysticercotic encephalitis or those with massive parasitic infection are given high-dose corticosteroid therapy and mannitol in cases of

Answer 36

Increased intracranial pressure

Question 37

In what temperature can kill the cysticerci?

Answer 37

Freeze at -20°C for 10 days

Question 38

Surgical removal of lesions | Albendazole therap: 10-15mg/kg/day for 8 days

Answer 38

Subarachnoid cysticercosis

Question 39

Surgical remobal of cyst

Answer 39

Ventricular cysticercosis

Question 40

Treated surgically before Praziquantel or Albendazole bcs ocular inflam can't be ctrlled by steroids

Answer 40

Ocular cysticercosis

Question 41

What will you do to symptomatic cysts outside CNS?

Answer 41

Surgical removal

Question 42

Common symptoms for D. latum

Answer 42

Nervous disturbances Digestive disorders Abdominal discomfort Wt loss Weak Anemia

Question 43

Vomiting Colicky abdominal pain Murphy’s sign Cholangiopancreatography (cholecystitis)

Answer 43

T. saginata

Question 44

Larval maturation of T. saginata in small intestine

Answer 44

12 weeks

Question 45

Drug that may cause blindness in px w ocular cysticercosis

Answer 45

Praziquantel