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Original Articles

Development of an Indirect ELISA to Detect Humoral Response to Strep to coc cus iniae Infection of Nile Tilapia, Oreochromis niloticus

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Pages 35-44 | Published online: 14 Aug 2009
 

Abstract

The humoral an ti body of Nile tilapia, Oreochromis niloticus, to Strep to coc cus iniae in fec tion was mea sured in two groups by an in di rect en zyme-linked immunoassay (ELISA). One treat ment group was ex per i men tally in oc u lated with S. iniae, and the other con sisted of a non-in oc u lated con trol. The an ti body re sponse of the ex per i men tal infected group was sig nif i cantly dif fer ent from the non-in fected tilapia. The in di rect ELISA uti lized goat anti-tilapia IgM and a com mer cially avail able rab bit anti-goat IgG en zyme con ju gate. The spec i fic ity of the an ti body re sponse was di rected against cell-free sonicated an ti gen prepa ra tion from whole S. iniae ARS-98-60 cells. The ELISA re sults were highly cor re lated with the ag glu ti na tion re sults for tilapia anti- S. iniae an ti body.

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