Rna Viruses

Essay specific features

 

Issue:

Science

 

Written by:

Marion M

 

Date added:

October 4, 2010

 

Level:

University

 

Grade:

A

 

No of pages / words:

6 / 1628

 

Was viewed:

7473 times

 

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Essay content:

Samples: pharyngeal and nasal exudates, nasal and pharyngeal washing, necroptic fragments 2. Influenza antigens may be demonstrated within the epithelial cells using fluorescent antibodies. 3. Isolation: on embrionated egg (in amniotic or alantoidian liquid) or cell culture 4. Identification is made mainly by hemagglutinoinhibation with specific serum using cock (rooster) erythrocytes...
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Serologic tests Are based on the at least four-fold rising of antibodies titer in the serum collected in convalescence. Hemagglutinoinhibation (HIA) -place diluted serum in a plate with wells -place standard antigens (A or B from one of the circulating variants N1H1, N1H2, N1H3, N2H1, N2H2, N2H3) -incubate for 60 minutes -place a suspension of cock erythrocytes -incubate for 1 hour and read The principle of the reaction: Influenza viruses have hemagglutinin antigens (H) so that if a suspension of viral antigen is placed in contact with erythrocytes the erythrocytes will be agglutinated...
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