Title of article :
Protective immunity of Nile tilapia against Ichthyophthirius multifiliis post-immunization with live theronts and sonicated trophonts
Author/Authors :
Xu، نويسنده , , De-Hai and Klesius، نويسنده , , Phillip H. and Shoemaker، نويسنده , , Craig A.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
4
From page :
124
To page :
127
Abstract :
Two immunization trials were conducted to evaluate host protection of Nile tilapia, Oreochromis niloticus against Ichthyophthirius multifiliis (Ich). Immunizations were done with live theronts or sonicated trophonts by bath immersion and intraperitoneal (IP) injection. The immunized fish were challenged with theronts 21 days post-immunization in trial I and 180 days post-immunization in trial II. The serum anti-Ich antibody and cumulative mortalities of tilapia were determined after theront challenge. Serum anti-Ich antibody was significantly higher (P < 0.05) in tilapia immunized with live theronts by immersion or IP injection or with sonicated trophonts administered by IP injection than tilapia immunized with sonicated trophonts by immersion, with bovine serum albumin by IP injection, or non-immunized controls. Host protection was acquired in fish immunized with live theronts by immersion or IP injection. Tilapia immunized with sonicated trophonts by IP injection were partially protected with a 57–77% survival in both trials. At 180 days post-immunization, serum antibody titers had declined in immunized fish yet they were still able to survive challenge. The protection appears not to be solely depending on serum antibody response against Ich.
Keywords :
Protective immunity , Live theront , Nile tilapia , Antibody titer , Fish survival , Ichthyophthirius multifiliis
Journal title :
Fish and Shellfish Immunology
Serial Year :
2008
Journal title :
Fish and Shellfish Immunology
Record number :
2108126
Link To Document :
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