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LA VACCINATION NATHALIE CLOUTIER UNIVERSITÉ LAVAL 27 MARS 2009
LA VACCINATION INTRODUIT DANS LE SYSTÈME DES ANTIGÈNES ISSUS D’UN MICROORGANISME.
CES ANTIGÈNES SONT TRANSPORTÉS VERS UN GANGLION LYMPHATIQUE.
UN LYMPHOCYTE B SPÉCIFIQUE DÉTECTE CES ANTIGÈNES.
LE LYMPHOCYTE B SPÉCIFIQUE SE MULTIPLIE ET SE DIFFÉRENCIE EN UN PLASMOCYTE SÉCRÉTEUR D’ANTICORPS.
L’ANTIGÈNE EST ÉLIMINÉ PAR CES ANTICORPS ET IL DISPARAÎT PROGRESSIVEMENT.
LES ANTICORPS DISPARAISSENT ET QUELQUES LYMPHOCYTES B SPÉCIFIQUES RESTENT DANS LE GANGLION EN TANT QUE LYMPHOCYTES B MÉMOIRES.
SI LE PATHOGÈNE AUQUEL L’INDIVIDU EST IMMUNISÉ INFECTAIT LE SYSTÈME, LES LYMPHOCYTES B MÉMOIRES SE MULTIPLIERAIENT ET PRODUIRAIENT RAPIDEMENT DES ANTICORPS.
CE PATHOGÈNE SERAIT RAPIDEMENT ÉLIMINÉ PAR LE SYSTÈME IMMUNITAIRE.
LES ANTICORPS DISPARAÎTRAIENT À NOUVEAU ET QUELQUES LYMPHOCYTES B MÉMOIRES RETOURNERAIENT DANS LE GANGLION LYMPHATIQUE JUSQU’À UNE FUTURE INFECTION.

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