Display results as :

Rechercher Advanced Search

Latest topics
» Virology MCQs 1-25
Casoni's Test EmptyWed Oct 22, 2014 6:51 am by Johnsnow

» protozoa inactivation
Casoni's Test EmptyWed Jun 29, 2011 4:28 pm by Guest

» Contributions of louis pasteur
Casoni's Test EmptySun Jun 07, 2009 6:52 pm by arsham

» Immuno prophylaxis of tetanus
Casoni's Test EmptySat Jun 06, 2009 11:16 pm by sakia_fazal

» pathogenecity of CLOSTRIDIUM PERFINGES
Casoni's Test EmptySat Jun 06, 2009 11:03 pm by sakia_fazal

» naglers reaction
Casoni's Test EmptySat Jun 06, 2009 10:53 pm by sakia_fazal

Casoni's Test EmptySat Jun 06, 2009 9:27 pm by sakia_fazal

» Trichomonas vaginalis
Casoni's Test EmptySat Jun 06, 2009 6:31 pm by sakia_fazal

» instestinal ameobiasis
Casoni's Test EmptySat Jun 06, 2009 4:49 pm by sakia_fazal


Casoni's Test Empty
free forum

Casoni's Test

Go down

Casoni's Test Empty Casoni's Test

Post  sudheerkher on Wed Jan 14, 2009 3:09 pm

Intradermal test, used for diagnosis of hydatid cyst disease caused by Echinococccus granulosus (Dog tapeworm). Introduced by Casoni in 1911.

Antigen used – Hydatid fluid collected from animal/human cyst and sterilised by Seitz filtration.

Control – Sterile saline.

Principle of the test – Immediate type of hypersensitivity primarily. Type IV Delayed hypersensitivity also plays a part.

Test – 0.2 ml of antigen injected intradermally on forearm and equal volume of saline injected on the other forearm. Observations made for next 30 mins and after 1 to 2 days.

Positive test –Appearance of wheal within 30 minutes on test forearm about 5 cms in diameter, with multiple pseudopodia like projections, fading in about an hour. There must not be any such a reaction on the control side.

Secondary reaction consisting of oedema and induration (Type IV – Tuberculin type Delayed type of hypersensitivity) after 8 hrs.

The test is very sensitive, but not specific. False positive reactions known to occur in other related parasitic infections.

Precaution – Being a type I hypersensitivity reaction, anaphylactic reaction tray must be kept ready before carrying out the test.


Posts : 65
Join date : 2008-11-12
Age : 70
Location : Ajman, UAE

View user profile

Back to top Go down

Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum