Echinococcus granulosus

Question 1

Dead end intermediate host mean ??

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Answer 1

The host which if infected once never transmits the agent to others

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Question 2

Dead end intermediate host in Echinococcus granulosus ??

Answer 2

Man

Question 3

Why man Dead end I host ??

Answer 3

Cyst which is formed in human must be ingested by dog/fox but there is least chance to ingest human tissue by other animals

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Question 4

Hydatid cysts definition?

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Answer 4

The larval stage of E g in man settles in various tissues & develops into a large fluid filled cyst

Question 4

What is produced from the germinal layer of hydatid cyst ??

Answer 4

Protoscoleces

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Question 5

Hydatid cyst structure ??

Answer 5

1. Outer cuticular layer - Ectocyst
2. Inner / Germinal layer - Endocyst

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Question 6

Thick layer ??

Answer 6

Outer cuticular layer

Question 7

Thin layer ???

Answer 7

inner
germinal
endocyst

Question 8

Vital layer of cyst ??

Answer 8

Inner/Germinal layer

Question 9

Why inner / germinal alyer of hydatid cyst is vital layer ??

Answer 9

1. Form the outer layer
2. Secrete specific hydatid fluid
3. Gives rise to Brood capsules with scolex

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Question 10

Optimum intermediate host of E g ??

Answer 10

Sheep

Question 11

Optimum definitive host of E G&raquo_space;??

Answer 11

Dog

Question 12

Specimen for laboratory diagnosis of E g ??

Answer 12

1. Serum
2. Hydatid fluid
3. Fine needle biopsy material for PCR

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Question 13

Serologic test for E g ??

Answer 13

1. Indirect Hemagglutination Test-IHAT
2. ELISA
3. Immunoelectrophoresis test
4. Latex agglutination test

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Question 14

PCR application ??

Answer 14

Detect Picogram quantities of E DNA in fine needle biopsy material

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Question 15

Exploratory cyst puncture ???

Answer 15

Withdrawing a few mililiters of hydarid cyst

Question 15

Chest Xray outcome in hydatid cyst ??

Answer 15

Pulmonary lesions , irregular , round masses of uniform density devoid of ccalcification

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Question 16

CT MRI ??

Answer 16

Simple fluid filled cyst / daughter cyst + hydatid sand

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Question 17

Detection of renal hydarid cyst ??

Answer 17

IV pyelogram

Question 18

Blood examination in hydatid cyst ??

Answer 18

Eosinophilia
20-25%

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Question 19

Complications of Hydatid cyst ??

Answer 19

1. Hepatic dysfunction
2. Bloody sputum
3. Headache
4. Focal neurologic sign
5. Fatal anaphylactic shock

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Question 20

Casoni test ??

Answer 20

Immediate hypersensitivity skin test by casoni in 1911

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Question 21

Casoni test procedure ??

Answer 21

0.2 ml sterile hydatid fluid - Seitz filter
0.2 ml sterile normal saline on other arm for control