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Vaccimonitor

Print version ISSN 1025-028XOn-line version ISSN 1025-0298

Vaccimonitor vol.15 no.3 Ciudad de la Habana Sept.-Dec. 2006

 

ARTICULOS ORIGINALES

 

Producción de un antisuero específico contra la cepa A/Johannesburg/33/94 (H3N2), y su utilidad en la caracterización de aislamientos de virus de influenza en ratas Wistar.

 

Production of a specific antiserum against strain A/Johannesburg/33/94 (H3N2), and its usefulness in
characterizing isolations of Influenza virus in Wistar rats.

Suset Oropesa, Francisco Calvi, Bárbara Hernández, Jorge Cantillo, Omayda Pérez, Irais Atencio, Angel Goyenechea

Instituto de Medicina Tropical Pedro Kourí (IPK). Novia del Mediodía. Km. 6 ½. La Lisa. Ciudad de La Habana. Cuba. Laboratorio Nacional de Influenza.

E-mail: s.oro@ipk.sld.cu, soro@infomed.sld.cu


RESUMEN

Se obtuvo un antisuero policlonal con alto título, alta especificidad y sensibilidad, contra la hemaglutinina de la cepa de influenza A/Johannesburg/33/94 que pertenece al subtipo A (H3N2). Se describe el proceso de obtención del antígeno o inmunógeno, el esquema de inmunización y su aplicación a las ratas Wistar como modelo animal; y se validó mediante la técnica de inhibición de la hemaglutinación (IH). El antisuero obtenido fue tratado con enzima destructora de receptores de producción nacional (EDR/IPK) para la eliminación de inhibidores inespecíficos de la IH. La validación se realizó frente a un panel que incluyó 9 cepas de referencia de influenza de los subtipos A(H3N2), A(H1N1) y el tipo B. No se detectaron reacciones inespecíficas frente a cepas A(H1N1) y del tipo B. Se determinó el tipo y subtipo de aislamientos autóctonos con resultados satisfactorios.

Palabras claves: Virus influenza, antisueros policlonales, caracterización antigénica, inhibición de la hemaglutinación.


ABSTRACT

A polyclonal antiserum with high titer, great specificity and sensitivity was obtained against the hemagglutinin of Influenza A/Johannesburg/33/94, belonging to subtype A (H3N2). The obtaining process of the antigen or immunogen, the immunization schedule and its administration to Wistar rats as animal model are described. All of these were validated by the hemagglutinin inhibition technique. The antiserum obtained was treated with receptor-destroying enzymes of national production (EDR/IPK) in order to eliminate the unspecific inhibitors of the hemagglutinin inhibition. Validation was carried out in front of a panel including 9 influenza reference strains belonging to subtypes A(H3N2), A(H1N1), and to type B. No unspecific reactions against strains A(H1N1) and of type B were detected. Five autochthonous isolates were satisfactorily typed and subtyped.

Keywords: Influenza virus, polyclonal antisera, antigenic characterization, hemagglutination inhibition.


 

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