One of the plasmid vaccines, pcDNA3-IHNV-G, pcDNA3-SHRV-G,
pcDNA3-SVCV-G, or pcDNA3, was used to vaccinate the fish by intramuscular
injection. PBS-injected fish were used as challenge controls. Plasmid DNA concentrations
were adjusted to 10 mg/25 ml by dilution in PBS, pH 7.4, and the
DNA concentration was confirmed by spectrophotometry. The fish (mean
weight, 0.56 g) were anesthetized in 0.1% tricane methanesulfonate (MS-222;
Finquel), injected intramuscularly with 25 ml of the corresponding plasmid or
PBS, and placed in 25-liter tanks with 50 fish per tank. A total of 20 tanks were
used: 4 for pcDNA3-, 4 for pcDNA3-IHNV-G-, 4 for pcDNA3-SHRV-G-, 4 for
pcDNA3-SVCV-G-, and 4 for PBS-injected fish. Tank locations were randomized
to avoid possible effects of tank position
One of the plasmid vaccines, pcDNA3-IHNV-G, pcDNA3-SHRV-G,pcDNA3-SVCV-G, or pcDNA3, was used to vaccinate the fish by intramuscularinjection. PBS-injected fish were used as challenge controls. Plasmid DNA concentrationswere adjusted to 10 mg/25 ml by dilution in PBS, pH 7.4, and theDNA concentration was confirmed by spectrophotometry. The fish (meanweight, 0.56 g) were anesthetized in 0.1% tricane methanesulfonate (MS-222;Finquel), injected intramuscularly with 25 ml of the corresponding plasmid orPBS, and placed in 25-liter tanks with 50 fish per tank. A total of 20 tanks wereused: 4 for pcDNA3-, 4 for pcDNA3-IHNV-G-, 4 for pcDNA3-SHRV-G-, 4 forpcDNA3-SVCV-G-, and 4 for PBS-injected fish. Tank locations were randomizedto avoid possible effects of tank position
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