Figure 3.
Virulence of vAh T6SS mutants in channel catfish fingerlings. (A) Percent mortalities in catfish fingerlings experimentally infected with vAh T6SS mutants and vAh wild type (WT) strain ML09-119. (B) Percent survival in catfish fingerlings surviving infection with T6SS mutants and re-challenged with vAh WT at 21 d post-infection. Data are the mean ± SE of three replicate tanks. Significant differences between challenged and non-vaccinated treatments are indicated with asterisks (p < 0.05).